Roll Observatory packages and add a roll script

packages/analyzer/test/generated/ast_test.dart

+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library engine.ast_test;
+
+import 'package:analyzer/src/generated/ast.dart';
+import 'package:analyzer/src/generated/java_core.dart';
+import 'package:analyzer/src/generated/java_engine.dart' show Predicate;
+import 'package:analyzer/src/generated/java_engine.dart';
+import 'package:analyzer/src/generated/scanner.dart';
+import 'package:analyzer/src/generated/testing/ast_factory.dart';
+import 'package:analyzer/src/generated/testing/token_factory.dart';
+import 'package:unittest/unittest.dart';
+
+import '../reflective_tests.dart';
+import '../utils.dart';
+import 'parser_test.dart' show ParserTestCase;
+import 'test_support.dart';
+
+main() {
+  initializeTestEnvironment();
+  runReflectiveTests(BreadthFirstVisitorTest);
+  runReflectiveTests(ClassDeclarationTest);
+  runReflectiveTests(ClassTypeAliasTest);
+  runReflectiveTests(ConstantEvaluatorTest);
+  runReflectiveTests(ConstructorDeclarationTest);
+  runReflectiveTests(FieldFormalParameterTest);
+  runReflectiveTests(IndexExpressionTest);
+  runReflectiveTests(NodeListTest);
+  runReflectiveTests(NodeLocatorTest);
+  runReflectiveTests(SimpleIdentifierTest);
+  runReflectiveTests(SimpleStringLiteralTest);
+  runReflectiveTests(StringInterpolationTest);
+  runReflectiveTests(ToSourceVisitorTest);
+  runReflectiveTests(VariableDeclarationTest);
+}
+
+class AssignmentKind extends Enum<AssignmentKind> {
+  static const AssignmentKind BINARY = const AssignmentKind('BINARY', 0);
+
+  static const AssignmentKind COMPOUND_LEFT =
+      const AssignmentKind('COMPOUND_LEFT', 1);
+
+  static const AssignmentKind COMPOUND_RIGHT =
+      const AssignmentKind('COMPOUND_RIGHT', 2);
+
+  static const AssignmentKind POSTFIX_INC =
+      const AssignmentKind('POSTFIX_INC', 3);
+
+  static const AssignmentKind PREFIX_DEC =
+      const AssignmentKind('PREFIX_DEC', 4);
+
+  static const AssignmentKind PREFIX_INC =
+      const AssignmentKind('PREFIX_INC', 5);
+
+  static const AssignmentKind PREFIX_NOT =
+      const AssignmentKind('PREFIX_NOT', 6);
+
+  static const AssignmentKind SIMPLE_LEFT =
+      const AssignmentKind('SIMPLE_LEFT', 7);
+
+  static const AssignmentKind SIMPLE_RIGHT =
+      const AssignmentKind('SIMPLE_RIGHT', 8);
+
+  static const AssignmentKind NONE = const AssignmentKind('NONE', 9);
+
+  static const List<AssignmentKind> values = const [
+    BINARY,
+    COMPOUND_LEFT,
+    COMPOUND_RIGHT,
+    POSTFIX_INC,
+    PREFIX_DEC,
+    PREFIX_INC,
+    PREFIX_NOT,
+    SIMPLE_LEFT,
+    SIMPLE_RIGHT,
+    NONE
+  ];
+
+  const AssignmentKind(String name, int ordinal) : super(name, ordinal);
+}
+
+class BreadthFirstVisitor_BreadthFirstVisitorTest_testIt
+    extends BreadthFirstVisitor<Object> {
+  List<AstNode> nodes;
+
+  BreadthFirstVisitor_BreadthFirstVisitorTest_testIt(this.nodes) : super();
+
+  @override
+  Object visitNode(AstNode node) {
+    nodes.add(node);
+    return super.visitNode(node);
+  }
+}
+
+@reflectiveTest
+class BreadthFirstVisitorTest extends ParserTestCase {
+  void test_it() {
+    String source = r'''
+class A {
+  bool get g => true;
+}
+class B {
+  int f() {
+    num q() {
+      return 3;
+    }
+  return q() + 4;
+  }
+}
+A f(var p) {
+  if ((p as A).g) {
+    return p;
+  } else {
+    return null;
+  }
+}''';
+    CompilationUnit unit = ParserTestCase.parseCompilationUnit(source);
+    List<AstNode> nodes = new List<AstNode>();
+    BreadthFirstVisitor<Object> visitor =
+        new BreadthFirstVisitor_BreadthFirstVisitorTest_testIt(nodes);
+    visitor.visitAllNodes(unit);
+    expect(nodes, hasLength(59));
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is CompilationUnit, CompilationUnit, nodes[0]);
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is ClassDeclaration, ClassDeclaration, nodes[2]);
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is FunctionDeclaration, FunctionDeclaration, nodes[3]);
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is FunctionDeclarationStatement,
+        FunctionDeclarationStatement,
+        nodes[27]);
+    EngineTestCase.assertInstanceOf(
+        (obj) => obj is IntegerLiteral, IntegerLiteral, nodes[58]);
+    //3
+  }
+}
+
+@reflectiveTest
+class ClassDeclarationTest extends ParserTestCase {
+  void test_getConstructor() {
+    List<ConstructorInitializer> initializers =
+        new List<ConstructorInitializer>();
+    ConstructorDeclaration defaultConstructor = AstFactory
+        .constructorDeclaration(AstFactory.identifier3("Test"), null,
+            AstFactory.formalParameterList(), initializers);
+    ConstructorDeclaration aConstructor = AstFactory.constructorDeclaration(
+        AstFactory.identifier3("Test"),
+        "a",
+        AstFactory.formalParameterList(),
+        initializers);
+    ConstructorDeclaration bConstructor = AstFactory.constructorDeclaration(
+        AstFactory.identifier3("Test"),
+        "b",
+        AstFactory.formalParameterList(),
+        initializers);
+    ClassDeclaration clazz = AstFactory.classDeclaration(null, "Test", null,
+        null, null, null, [defaultConstructor, aConstructor, bConstructor]);
+    expect(clazz.getConstructor(null), same(defaultConstructor));
+    expect(clazz.getConstructor("a"), same(aConstructor));
+    expect(clazz.getConstructor("b"), same(bConstructor));
+    expect(clazz.getConstructor("noSuchConstructor"), same(null));
+  }
+
+  void test_getField() {
+    VariableDeclaration aVar = AstFactory.variableDeclaration("a");
+    VariableDeclaration bVar = AstFactory.variableDeclaration("b");
+    VariableDeclaration cVar = AstFactory.variableDeclaration("c");
+    ClassDeclaration clazz =
+        AstFactory.classDeclaration(null, "Test", null, null, null, null, [
+      AstFactory.fieldDeclaration2(false, null, [aVar]),
+      AstFactory.fieldDeclaration2(false, null, [bVar, cVar])
+    ]);
+    expect(clazz.getField("a"), same(aVar));
+    expect(clazz.getField("b"), same(bVar));
+    expect(clazz.getField("c"), same(cVar));
+    expect(clazz.getField("noSuchField"), same(null));
+  }
+
+  void test_getMethod() {
+    MethodDeclaration aMethod = AstFactory.methodDeclaration(null, null, null,
+        null, AstFactory.identifier3("a"), AstFactory.formalParameterList());
+    MethodDeclaration bMethod = AstFactory.methodDeclaration(null, null, null,
+        null, AstFactory.identifier3("b"), AstFactory.formalParameterList());
+    ClassDeclaration clazz = AstFactory.classDeclaration(
+        null, "Test", null, null, null, null, [aMethod, bMethod]);
+    expect(clazz.getMethod("a"), same(aMethod));
+    expect(clazz.getMethod("b"), same(bMethod));
+    expect(clazz.getMethod("noSuchMethod"), same(null));
+  }
+
+  void test_isAbstract() {
+    expect(
+        AstFactory
+            .classDeclaration(null, "A", null, null, null, null)
+            .isAbstract,
+        isFalse);
+    expect(
+        AstFactory
+            .classDeclaration(Keyword.ABSTRACT, "B", null, null, null, null)
+            .isAbstract,
+        isTrue);
+  }
+}
+
+@reflectiveTest
+class ClassTypeAliasTest extends ParserTestCase {
+  void test_isAbstract() {
+    expect(
+        AstFactory.classTypeAlias("A", null, null, null, null, null).isAbstract,
+        isFalse);
+    expect(
+        AstFactory
+            .classTypeAlias("B", null, Keyword.ABSTRACT, null, null, null)
+            .isAbstract,
+        isTrue);
+  }
+}
+
+@reflectiveTest
+class ConstantEvaluatorTest extends ParserTestCase {
+  void fail_constructor() {
+    Object value = _getConstantValue("?");
+    expect(value, null);
+  }
+
+  void fail_identifier_class() {
+    Object value = _getConstantValue("?");
+    expect(value, null);
+  }
+
+  void fail_identifier_function() {
+    Object value = _getConstantValue("?");
+    expect(value, null);
+  }
+
+  void fail_identifier_static() {
+    Object value = _getConstantValue("?");
+    expect(value, null);
+  }
+
+  void fail_identifier_staticMethod() {
+    Object value = _getConstantValue("?");
+    expect(value, null);
+  }
+
+  void fail_identifier_topLevel() {
+    Object value = _getConstantValue("?");
+    expect(value, null);
+  }
+
+  void fail_identifier_typeParameter() {
+    Object value = _getConstantValue("?");
+    expect(value, null);
+  }
+
+  void test_binary_bitAnd() {
+    Object value = _getConstantValue("74 & 42");
+    EngineTestCase.assertInstanceOf((obj) => obj is int, int, value);
+    expect(value as int, 74 & 42);
+  }
+
+  void test_binary_bitOr() {
+    Object value = _getConstantValue("74 | 42");
+    EngineTestCase.assertInstanceOf((obj) => obj is int, int, value);
+    expect(value as int, 74 | 42);
+  }
+
+  void test_binary_bitXor() {
+    Object value = _getConstantValue("74 ^ 42");
+    EngineTestCase.assertInstanceOf((obj) => obj is int, int, value);
+    expect(value as int, 74 ^ 42);
+  }
+
+  void test_binary_divide_double() {
+    Object value = _getConstantValue("3.2 / 2.3");
+    expect(value, 3.2 / 2.3);
+  }
+
+  void test_binary_divide_integer() {
+    Object value = _getConstantValue("3 / 2");
+    expect(value, 1.5);
+  }
+
+  void test_binary_equal_boolean() {
+    Object value = _getConstantValue("true == false");
+    expect(value, false);
+  }
+
+  void test_binary_equal_integer() {
+    Object value = _getConstantValue("2 == 3");
+    expect(value, false);
+  }
+
+  void test_binary_equal_invalidLeft() {
+    Object value = _getConstantValue("a == 3");
+    expect(value, ConstantEvaluator.NOT_A_CONSTANT);
+  }
+
+  void test_binary_equal_invalidRight() {
+    Object value = _getConstantValue("2 == a");
+    expect(value, ConstantEvaluator.NOT_A_CONSTANT);
+  }
+
+  void test_binary_equal_string() {
+    Object value = _getConstantValue("'a' == 'b'");
+    expect(value, false);
+  }
+
+  void test_binary_greaterThan() {
+    Object value = _getConstantValue("2 > 3");
+    expect(value, false);
+  }
+
+  void test_binary_greaterThanOrEqual() {
+    Object value = _getConstantValue("2 >= 3");
+    expect(value, false);
+  }
+
+  void test_binary_leftShift() {
+    Object value = _getConstantValue("16 << 2");
+    EngineTestCase.assertInstanceOf((obj) => obj is int, int, value);
+    expect(value as int, 64);
+  }
+
+  void test_binary_lessThan() {
+    Object value = _getConstantValue("2 < 3");
+    expect(value, true);
+  }
+
+  void test_binary_lessThanOrEqual() {
+    Object value = _getConstantValue("2 <= 3");
+    expect(value, true);
+  }
+
+  void test_binary_logicalAnd() {
+    Object value = _getConstantValue("true && false");
+    expect(value, false);
+  }
+
+  void test_binary_logicalOr() {
+    Object value = _getConstantValue("true || false");
+    expect(value, true);
+  }
+
+  void test_binary_minus_double() {
+    Object value = _getConstantValue("3.2 - 2.3");
+    expect(value, 3.2 - 2.3);
+  }
+
+  void test_binary_minus_integer() {
+    Object value = _getConstantValue("3 - 2");
+    expect(value, 1);
+  }
+
+  void test_binary_notEqual_boolean() {
+    Object value = _getConstantValue("true != false");
+    expect(value, true);
+  }
+
+  void test_binary_notEqual_integer() {
+    Object value = _getConstantValue("2 != 3");
+    expect(value, true);
+  }
+
+  void test_binary_notEqual_invalidLeft() {
+    Object value = _getConstantValue("a != 3");
+    expect(value, ConstantEvaluator.NOT_A_CONSTANT);
+  }
+
+  void test_binary_notEqual_invalidRight() {
+    Object value = _getConstantValue("2 != a");
+    expect(value, ConstantEvaluator.NOT_A_CONSTANT);
+  }
+
+  void test_binary_notEqual_string() {
+    Object value = _getConstantValue("'a' != 'b'");
+    expect(value, true);
+  }
+
+  void test_binary_plus_double() {
+    Object value = _getConstantValue("2.3 + 3.2");
+    expect(value, 2.3 + 3.2);
+  }
+
+  void test_binary_plus_integer() {
+    Object value = _getConstantValue("2 + 3");
+    expect(value, 5);
+  }
+
+  void test_binary_remainder_double() {
+    Object value = _getConstantValue("3.2 % 2.3");
+    expect(value, 3.2 % 2.3);
+  }
+
+  void test_binary_remainder_integer() {
+    Object value = _getConstantValue("8 % 3");
+    expect(value, 2);
+  }
+
+  void test_binary_rightShift() {
+    Object value = _getConstantValue("64 >> 2");
+    EngineTestCase.assertInstanceOf((obj) => obj is int, int, value);
+    expect(value as int, 16);
+  }
+
+  void test_binary_times_double() {
+    Object value = _getConstantValue("2.3 * 3.2");
+    expect(value, 2.3 * 3.2);
+  }
+
+  void test_binary_times_integer() {
+    Object value = _getConstantValue("2 * 3");
+    expect(value, 6);
+  }
+
+  void test_binary_truncatingDivide_double() {
+    Object value = _getConstantValue("3.2 ~/ 2.3");
+    EngineTestCase.assertInstanceOf((obj) => obj is int, int, value);
+    expect(value as int, 1);
+  }
+
+  void test_binary_truncatingDivide_integer() {
+    Object value = _getConstantValue("10 ~/ 3");
+    EngineTestCase.assertInstanceOf((obj) => obj is int, int, value);
+    expect(value as int, 3);
+  }
+
+  void test_literal_boolean_false() {
+    Object value = _getConstantValue("false");
+    expect(value, false);
+  }
+
+  void test_literal_boolean_true() {
+    Object value = _getConstantValue("true");
+    expect(value, true);
+  }
+
+  void test_literal_list() {
+    Object value = _getConstantValue("['a', 'b', 'c']");
+    EngineTestCase.assertInstanceOf((obj) => obj is List, List, value);
+    List list = value as List;
+    expect(list.length, 3);
+    expect(list[0], "a");
+    expect(list[1], "b");
+    expect(list[2], "c");
+  }
+
+  void test_literal_map() {
+    Object value = _getConstantValue("{'a' : 'm', 'b' : 'n', 'c' : 'o'}");
+    EngineTestCase.assertInstanceOf((obj) => obj is Map, Map, value);
+    Map map = value as Map;
+    expect(map.length, 3);
+    expect(map["a"], "m");
+    expect(map["b"], "n");
+    expect(map["c"], "o");
+  }
+
+  void test_literal_null() {
+    Object value = _getConstantValue("null");
+    expect(value, null);
+  }
+
+  void test_literal_number_double() {
+    Object value = _getConstantValue("3.45");
+    expect(value, 3.45);
+  }
+
+  void test_literal_number_integer() {
+    Object value = _getConstantValue("42");
+    expect(value, 42);
+  }
+
+  void test_literal_string_adjacent() {
+    Object value = _getConstantValue("'abc' 'def'");
+    expect(value, "abcdef");
+  }
+
+  void test_literal_string_interpolation_invalid() {
+    Object value = _getConstantValue("'a\${f()}c'");
+    expect(value, ConstantEvaluator.NOT_A_CONSTANT);
+  }
+
+  void test_literal_string_interpolation_valid() {
+    Object value = _getConstantValue("'a\${3}c'");
+    expect(value, "a3c");
+  }
+
+  void test_literal_string_simple() {
+    Object value = _getConstantValue("'abc'");
+    expect(value, "abc");
+  }
+
+  void test_parenthesizedExpression() {
+    Object value = _getConstantValue("('a')");
+    expect(value, "a");
+  }
+
+  void test_unary_bitNot() {
+    Object value = _getConstantValue("~42");
+    EngineTestCase.assertInstanceOf((obj) => obj is int, int, value);
+    expect(value as int, ~42);
+  }
+
+  void test_unary_logicalNot() {
+    Object value = _getConstantValue("!true");
+    expect(value, false);
+  }
+
+  void test_unary_negated_double() {
+    Object value = _getConstantValue("-42.3");
+    expect(value, -42.3);
+  }
+
+  void test_unary_negated_integer() {
+    Object value = _getConstantValue("-42");
+    expect(value, -42);
+  }
+
+  Object _getConstantValue(String source) =>
+      parseExpression(source).accept(new ConstantEvaluator());
+}
+
+@reflectiveTest
+class ConstructorDeclarationTest extends EngineTestCase {
+  void test_firstTokenAfterCommentAndMetadata_all_inverted() {
+    Token externalKeyword = TokenFactory.tokenFromKeyword(Keyword.EXTERNAL);
+    externalKeyword.offset = 14;
+    ConstructorDeclaration declaration = AstFactory.constructorDeclaration2(
+        Keyword.CONST,
+        Keyword.FACTORY,
+        AstFactory.identifier3('int'),
+        null,
+        null,
+        null,
+        null);
+    declaration.externalKeyword = externalKeyword;
+    declaration.constKeyword.offset = 8;
+    Token factoryKeyword = declaration.factoryKeyword;
+    factoryKeyword.offset = 0;
+    expect(declaration.firstTokenAfterCommentAndMetadata, factoryKeyword);
+  }
+
+  void test_firstTokenAfterCommentAndMetadata_all_normal() {
+    Token token = TokenFactory.tokenFromKeyword(Keyword.EXTERNAL);
+    token.offset = 0;
+    ConstructorDeclaration declaration = AstFactory.constructorDeclaration2(
+        Keyword.CONST,
+        Keyword.FACTORY,
+        AstFactory.identifier3('int'),
+        null,
+        null,
+        null,
+        null);
+    declaration.externalKeyword = token;
+    declaration.constKeyword.offset = 9;
+    declaration.factoryKeyword.offset = 15;
+    expect(declaration.firstTokenAfterCommentAndMetadata, token);
+  }
+
+  void test_firstTokenAfterCommentAndMetadata_constOnly() {
+    ConstructorDeclaration declaration = AstFactory.constructorDeclaration2(
+        Keyword.CONST,
+        null,
+        AstFactory.identifier3('int'),
+        null,
+        null,
+        null,
+        null);
+    expect(declaration.firstTokenAfterCommentAndMetadata,
+        declaration.constKeyword);
+  }
+
+  void test_firstTokenAfterCommentAndMetadata_externalOnly() {
+    Token externalKeyword = TokenFactory.tokenFromKeyword(Keyword.EXTERNAL);
+    ConstructorDeclaration declaration = AstFactory.constructorDeclaration2(
+        null, null, AstFactory.identifier3('int'), null, null, null, null);
+    declaration.externalKeyword = externalKeyword;
+    expect(declaration.firstTokenAfterCommentAndMetadata, externalKeyword);
+  }
+
+  void test_firstTokenAfterCommentAndMetadata_factoryOnly() {
+    ConstructorDeclaration declaration = AstFactory.constructorDeclaration2(
+        null,
+        Keyword.FACTORY,
+        AstFactory.identifier3('int'),
+        null,
+        null,
+        null,
+        null);
+    expect(declaration.firstTokenAfterCommentAndMetadata,
+        declaration.factoryKeyword);
+  }
+}
+
+@reflectiveTest
+class FieldFormalParameterTest extends EngineTestCase {
+  void test_endToken_noParameters() {
+    FieldFormalParameter parameter = AstFactory.fieldFormalParameter2('field');
+    expect(parameter.endToken, parameter.identifier.endToken);
+  }
+
+  void test_endToken_parameters() {
+    FieldFormalParameter parameter = AstFactory.fieldFormalParameter(
+        null, null, 'field', AstFactory.formalParameterList([]));
+    expect(parameter.endToken, parameter.parameters.endToken);
+  }
+}
+
+@reflectiveTest
+class IndexExpressionTest extends EngineTestCase {
+  void test_inGetterContext_assignment_compound_left() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    // a[b] += c
+    AstFactory.assignmentExpression(
+        expression, TokenType.PLUS_EQ, AstFactory.identifier3("c"));
+    expect(expression.inGetterContext(), isTrue);
+  }
+
+  void test_inGetterContext_assignment_simple_left() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    // a[b] = c
+    AstFactory.assignmentExpression(
+        expression, TokenType.EQ, AstFactory.identifier3("c"));
+    expect(expression.inGetterContext(), isFalse);
+  }
+
+  void test_inGetterContext_nonAssignment() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    // a[b] + c
+    AstFactory.binaryExpression(
+        expression, TokenType.PLUS, AstFactory.identifier3("c"));
+    expect(expression.inGetterContext(), isTrue);
+  }
+
+  void test_inSetterContext_assignment_compound_left() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    // a[b] += c
+    AstFactory.assignmentExpression(
+        expression, TokenType.PLUS_EQ, AstFactory.identifier3("c"));
+    expect(expression.inSetterContext(), isTrue);
+  }
+
+  void test_inSetterContext_assignment_compound_right() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    // c += a[b]
+    AstFactory.assignmentExpression(
+        AstFactory.identifier3("c"), TokenType.PLUS_EQ, expression);
+    expect(expression.inSetterContext(), isFalse);
+  }
+
+  void test_inSetterContext_assignment_simple_left() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    // a[b] = c
+    AstFactory.assignmentExpression(
+        expression, TokenType.EQ, AstFactory.identifier3("c"));
+    expect(expression.inSetterContext(), isTrue);
+  }
+
+  void test_inSetterContext_assignment_simple_right() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    // c = a[b]
+    AstFactory.assignmentExpression(
+        AstFactory.identifier3("c"), TokenType.EQ, expression);
+    expect(expression.inSetterContext(), isFalse);
+  }
+
+  void test_inSetterContext_nonAssignment() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    AstFactory.binaryExpression(
+        expression, TokenType.PLUS, AstFactory.identifier3("c"));
+    // a[b] + cc
+    expect(expression.inSetterContext(), isFalse);
+  }
+
+  void test_inSetterContext_postfix() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    AstFactory.postfixExpression(expression, TokenType.PLUS_PLUS);
+    // a[b]++
+    expect(expression.inSetterContext(), isTrue);
+  }
+
+  void test_inSetterContext_prefix_bang() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    // !a[b]
+    AstFactory.prefixExpression(TokenType.BANG, expression);
+    expect(expression.inSetterContext(), isFalse);
+  }
+
+  void test_inSetterContext_prefix_minusMinus() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    // --a[b]
+    AstFactory.prefixExpression(TokenType.MINUS_MINUS, expression);
+    expect(expression.inSetterContext(), isTrue);
+  }
+
+  void test_inSetterContext_prefix_plusPlus() {
+    IndexExpression expression = AstFactory.indexExpression(
+        AstFactory.identifier3("a"), AstFactory.identifier3("b"));
+    // ++a[b]
+    AstFactory.prefixExpression(TokenType.PLUS_PLUS, expression);
+    expect(expression.inSetterContext(), isTrue);
+  }
+}
+
+@reflectiveTest
+class NodeListTest extends EngineTestCase {
+  void test_add() {
+    AstNode parent = AstFactory.argumentList();
+    AstNode firstNode = AstFactory.booleanLiteral(true);
+    AstNode secondNode = AstFactory.booleanLiteral(false);
+    NodeList<AstNode> list = new NodeList<AstNode>(parent);
+    list.insert(0, secondNode);
+    list.insert(0, firstNode);
+    expect(list, hasLength(2));
+    expect(list[0], same(firstNode));
+    expect(list[1], same(secondNode));
+    expect(firstNode.parent, same(parent));
+    expect(secondNode.parent, same(parent));
+    AstNode thirdNode = AstFactory.booleanLiteral(false);
+    list.insert(1, thirdNode);
+    expect(list, hasLength(3));
+    expect(list[0], same(firstNode));
+    expect(list[1], same(thirdNode));
+    expect(list[2], same(secondNode));
+    expect(firstNode.parent, same(parent));
+    expect(secondNode.parent, same(parent));
+    expect(thirdNode.parent, same(parent));
+  }
+
+  void test_add_negative() {
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    try {
+      list.insert(-1, AstFactory.booleanLiteral(true));
+      fail("Expected IndexOutOfBoundsException");
+    } on RangeError {
+      // Expected
+    }
+  }
+
+  void test_add_tooBig() {
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    try {
+      list.insert(1, AstFactory.booleanLiteral(true));
+      fail("Expected IndexOutOfBoundsException");
+    } on RangeError {
+      // Expected
+    }
+  }
+
+  void test_addAll() {
+    AstNode parent = AstFactory.argumentList();
+    List<AstNode> firstNodes = new List<AstNode>();
+    AstNode firstNode = AstFactory.booleanLiteral(true);
+    AstNode secondNode = AstFactory.booleanLiteral(false);
+    firstNodes.add(firstNode);
+    firstNodes.add(secondNode);
+    NodeList<AstNode> list = new NodeList<AstNode>(parent);
+    list.addAll(firstNodes);
+    expect(list, hasLength(2));
+    expect(list[0], same(firstNode));
+    expect(list[1], same(secondNode));
+    expect(firstNode.parent, same(parent));
+    expect(secondNode.parent, same(parent));
+    List<AstNode> secondNodes = new List<AstNode>();
+    AstNode thirdNode = AstFactory.booleanLiteral(true);
+    AstNode fourthNode = AstFactory.booleanLiteral(false);
+    secondNodes.add(thirdNode);
+    secondNodes.add(fourthNode);
+    list.addAll(secondNodes);
+    expect(list, hasLength(4));
+    expect(list[0], same(firstNode));
+    expect(list[1], same(secondNode));
+    expect(list[2], same(thirdNode));
+    expect(list[3], same(fourthNode));
+    expect(firstNode.parent, same(parent));
+    expect(secondNode.parent, same(parent));
+    expect(thirdNode.parent, same(parent));
+    expect(fourthNode.parent, same(parent));
+  }
+
+  void test_creation() {
+    AstNode owner = AstFactory.argumentList();
+    NodeList<AstNode> list = new NodeList<AstNode>(owner);
+    expect(list, isNotNull);
+    expect(list, hasLength(0));
+    expect(list.owner, same(owner));
+  }
+
+  void test_get_negative() {
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    try {
+      list[-1];
+      fail("Expected IndexOutOfBoundsException");
+    } on RangeError {
+      // Expected
+    }
+  }
+
+  void test_get_tooBig() {
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    try {
+      list[1];
+      fail("Expected IndexOutOfBoundsException");
+    } on RangeError {
+      // Expected
+    }
+  }
+
+  void test_getBeginToken_empty() {
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    expect(list.beginToken, isNull);
+  }
+
+  void test_getBeginToken_nonEmpty() {
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    AstNode node =
+        AstFactory.parenthesizedExpression(AstFactory.booleanLiteral(true));
+    list.add(node);
+    expect(list.beginToken, same(node.beginToken));
+  }
+
+  void test_getEndToken_empty() {
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    expect(list.endToken, isNull);
+  }
+
+  void test_getEndToken_nonEmpty() {
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    AstNode node =
+        AstFactory.parenthesizedExpression(AstFactory.booleanLiteral(true));
+    list.add(node);
+    expect(list.endToken, same(node.endToken));
+  }
+
+  void test_indexOf() {
+    List<AstNode> nodes = new List<AstNode>();
+    AstNode firstNode = AstFactory.booleanLiteral(true);
+    AstNode secondNode = AstFactory.booleanLiteral(false);
+    AstNode thirdNode = AstFactory.booleanLiteral(true);
+    AstNode fourthNode = AstFactory.booleanLiteral(false);
+    nodes.add(firstNode);
+    nodes.add(secondNode);
+    nodes.add(thirdNode);
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    list.addAll(nodes);
+    expect(list, hasLength(3));
+    expect(list.indexOf(firstNode), 0);
+    expect(list.indexOf(secondNode), 1);
+    expect(list.indexOf(thirdNode), 2);
+    expect(list.indexOf(fourthNode), -1);
+    expect(list.indexOf(null), -1);
+  }
+
+  void test_remove() {
+    List<AstNode> nodes = new List<AstNode>();
+    AstNode firstNode = AstFactory.booleanLiteral(true);
+    AstNode secondNode = AstFactory.booleanLiteral(false);
+    AstNode thirdNode = AstFactory.booleanLiteral(true);
+    nodes.add(firstNode);
+    nodes.add(secondNode);
+    nodes.add(thirdNode);
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    list.addAll(nodes);
+    expect(list, hasLength(3));
+    expect(list.removeAt(1), same(secondNode));
+    expect(list, hasLength(2));
+    expect(list[0], same(firstNode));
+    expect(list[1], same(thirdNode));
+  }
+
+  void test_remove_negative() {
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    try {
+      list.removeAt(-1);
+      fail("Expected IndexOutOfBoundsException");
+    } on RangeError {
+      // Expected
+    }
+  }
+
+  void test_remove_tooBig() {
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    try {
+      list.removeAt(1);
+      fail("Expected IndexOutOfBoundsException");
+    } on RangeError {
+      // Expected
+    }
+  }
+
+  void test_set() {
+    List<AstNode> nodes = new List<AstNode>();
+    AstNode firstNode = AstFactory.booleanLiteral(true);
+    AstNode secondNode = AstFactory.booleanLiteral(false);
+    AstNode thirdNode = AstFactory.booleanLiteral(true);
+    nodes.add(firstNode);
+    nodes.add(secondNode);
+    nodes.add(thirdNode);
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    list.addAll(nodes);
+    expect(list, hasLength(3));
+    AstNode fourthNode = AstFactory.integer(0);
+    expect(javaListSet(list, 1, fourthNode), same(secondNode));
+    expect(list, hasLength(3));
+    expect(list[0], same(firstNode));
+    expect(list[1], same(fourthNode));
+    expect(list[2], same(thirdNode));
+  }
+
+  void test_set_negative() {
+    AstNode node = AstFactory.booleanLiteral(true);
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    try {
+      javaListSet(list, -1, node);
+      fail("Expected IndexOutOfBoundsException");
+    } on RangeError {
+      // Expected
+    }
+  }
+
+  void test_set_tooBig() {
+    AstNode node = AstFactory.booleanLiteral(true);
+    NodeList<AstNode> list = new NodeList<AstNode>(AstFactory.argumentList());
+    try {
+      javaListSet(list, 1, node);
+      fail("Expected IndexOutOfBoundsException");
+    } on RangeError {
+      // Expected
+    }
+  }
+}
+
+@reflectiveTest
+class NodeLocatorTest extends ParserTestCase {
+  void test_range() {
+    CompilationUnit unit =
+        ParserTestCase.parseCompilationUnit("library myLib;");
+    _assertLocate(
+        unit, 4, 10, (node) => node is LibraryDirective, LibraryDirective);
+  }
+
+  void test_searchWithin_null() {
+    NodeLocator locator = new NodeLocator(0, 0);
+    expect(locator.searchWithin(null), isNull);
+  }
+
+  void test_searchWithin_offset() {
+    CompilationUnit unit =
+        ParserTestCase.parseCompilationUnit("library myLib;");
+    _assertLocate(
+        unit, 10, 10, (node) => node is SimpleIdentifier, SimpleIdentifier);
+  }
+
+  void test_searchWithin_offsetAfterNode() {
+    CompilationUnit unit = ParserTestCase.parseCompilationUnit(r'''
+class A {}
+class B {}''');
+    NodeLocator locator = new NodeLocator(1024, 1024);
+    AstNode node = locator.searchWithin(unit.declarations[0]);
+    expect(node, isNull);
+  }
+
+  void test_searchWithin_offsetBeforeNode() {
+    CompilationUnit unit = ParserTestCase.parseCompilationUnit(r'''
+class A {}
+class B {}''');
+    NodeLocator locator = new NodeLocator(0, 0);
+    AstNode node = locator.searchWithin(unit.declarations[1]);
+    expect(node, isNull);
+  }
+
+  void _assertLocate(CompilationUnit unit, int start, int end,
+      Predicate<AstNode> predicate, Type expectedClass) {
+    NodeLocator locator = new NodeLocator(start, end);
+    AstNode node = locator.searchWithin(unit);
+    expect(node, isNotNull);
+    expect(locator.foundNode, same(node));
+    expect(node.offset <= start, isTrue, reason: "Node starts after range");
+    expect(node.offset + node.length > end, isTrue,
+        reason: "Node ends before range");
+    EngineTestCase.assertInstanceOf(predicate, expectedClass, node);
+  }
+}
+
+@reflectiveTest
+class SimpleIdentifierTest extends ParserTestCase {
+  void test_inDeclarationContext_catch_exception() {
+    SimpleIdentifier identifier =
+        AstFactory.catchClause("e").exceptionParameter;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_catch_stack() {
+    SimpleIdentifier identifier =
+        AstFactory.catchClause2("e", "s").stackTraceParameter;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_classDeclaration() {
+    SimpleIdentifier identifier =
+        AstFactory.classDeclaration(null, "C", null, null, null, null).name;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_classTypeAlias() {
+    SimpleIdentifier identifier =
+        AstFactory.classTypeAlias("C", null, null, null, null, null).name;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_constructorDeclaration() {
+    SimpleIdentifier identifier = AstFactory
+        .constructorDeclaration(AstFactory.identifier3("C"), "c", null, null)
+        .name;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_declaredIdentifier() {
+    DeclaredIdentifier declaredIdentifier = AstFactory.declaredIdentifier3("v");
+    SimpleIdentifier identifier = declaredIdentifier.identifier;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_enumConstantDeclaration() {
+    EnumDeclaration enumDeclaration =
+        AstFactory.enumDeclaration2('MyEnum', ['CONST']);
+    SimpleIdentifier identifier = enumDeclaration.constants[0].name;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_enumDeclaration() {
+    EnumDeclaration enumDeclaration =
+        AstFactory.enumDeclaration2('MyEnum', ['A', 'B', 'C']);
+    SimpleIdentifier identifier = enumDeclaration.name;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_fieldFormalParameter() {
+    SimpleIdentifier identifier =
+        AstFactory.fieldFormalParameter2("p").identifier;
+    expect(identifier.inDeclarationContext(), isFalse);
+  }
+
+  void test_inDeclarationContext_functionDeclaration() {
+    SimpleIdentifier identifier =
+        AstFactory.functionDeclaration(null, null, "f", null).name;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_functionTypeAlias() {
+    SimpleIdentifier identifier =
+        AstFactory.typeAlias(null, "F", null, null).name;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_label_false() {
+    SimpleIdentifier identifier =
+        AstFactory.namedExpression2("l", AstFactory.integer(0)).name.label;
+    expect(identifier.inDeclarationContext(), isFalse);
+  }
+
+  void test_inDeclarationContext_label_true() {
+    Label label = AstFactory.label2("l");
+    SimpleIdentifier identifier = label.label;
+    AstFactory.labeledStatement([label], AstFactory.emptyStatement());
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_methodDeclaration() {
+    SimpleIdentifier identifier = AstFactory.identifier3("m");
+    AstFactory.methodDeclaration2(
+        null, null, null, null, identifier, null, null);
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_prefix() {
+    SimpleIdentifier identifier =
+        AstFactory.importDirective3("uri", "pref").prefix;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_simpleFormalParameter() {
+    SimpleIdentifier identifier =
+        AstFactory.simpleFormalParameter3("p").identifier;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_typeParameter_bound() {
+    TypeName bound = AstFactory.typeName4("A");
+    SimpleIdentifier identifier = bound.name as SimpleIdentifier;
+    AstFactory.typeParameter2("E", bound);
+    expect(identifier.inDeclarationContext(), isFalse);
+  }
+
+  void test_inDeclarationContext_typeParameter_name() {
+    SimpleIdentifier identifier = AstFactory.typeParameter("E").name;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inDeclarationContext_variableDeclaration() {
+    SimpleIdentifier identifier = AstFactory.variableDeclaration("v").name;
+    expect(identifier.inDeclarationContext(), isTrue);
+  }
+
+  void test_inGetterContext() {
+    for (WrapperKind wrapper in WrapperKind.values) {
+      for (AssignmentKind assignment in AssignmentKind.values) {
+        SimpleIdentifier identifier = _createIdentifier(wrapper, assignment);
+        if (assignment == AssignmentKind.SIMPLE_LEFT &&
+            wrapper != WrapperKind.PREFIXED_LEFT &&
+            wrapper != WrapperKind.PROPERTY_LEFT) {
+          if (identifier.inGetterContext()) {
+            fail("Expected ${_topMostNode(identifier).toSource()} to be false");
+          }
+        } else {
+          if (!identifier.inGetterContext()) {
+            fail("Expected ${_topMostNode(identifier).toSource()} to be true");
+          }
+        }
+      }
+    }
+  }
+
+  void test_inGetterContext_forEachLoop() {
+    SimpleIdentifier identifier = AstFactory.identifier3("a");
+    Expression iterator = AstFactory.listLiteral();
+    Statement body = AstFactory.block();
+    AstFactory.forEachStatement2(identifier, iterator, body);
+    expect(identifier.inGetterContext(), isFalse);
+  }
+
+  void test_inReferenceContext() {
+    SimpleIdentifier identifier = AstFactory.identifier3("id");
+    AstFactory.namedExpression(
+        AstFactory.label(identifier), AstFactory.identifier3("_"));
+    expect(identifier.inGetterContext(), isFalse);
+    expect(identifier.inSetterContext(), isFalse);
+  }
+
+  void test_inSetterContext() {
+    for (WrapperKind wrapper in WrapperKind.values) {
+      for (AssignmentKind assignment in AssignmentKind.values) {
+        SimpleIdentifier identifier = _createIdentifier(wrapper, assignment);
+        if (wrapper == WrapperKind.PREFIXED_LEFT ||
+            wrapper == WrapperKind.PROPERTY_LEFT ||
+            assignment == AssignmentKind.BINARY ||
+            assignment == AssignmentKind.COMPOUND_RIGHT ||
+            assignment == AssignmentKind.PREFIX_NOT ||
+            assignment == AssignmentKind.SIMPLE_RIGHT ||
+            assignment == AssignmentKind.NONE) {
+          if (identifier.inSetterContext()) {
+            fail("Expected ${_topMostNode(identifier).toSource()} to be false");
+          }
+        } else {
+          if (!identifier.inSetterContext()) {
+            fail("Expected ${_topMostNode(identifier).toSource()} to be true");
+          }
+        }
+      }
+    }
+  }
+
+  void test_inSetterContext_forEachLoop() {
+    SimpleIdentifier identifier = AstFactory.identifier3("a");
+    Expression iterator = AstFactory.listLiteral();
+    Statement body = AstFactory.block();
+    AstFactory.forEachStatement2(identifier, iterator, body);
+    expect(identifier.inSetterContext(), isTrue);
+  }
+
+  void test_isQualified_inMethodInvocation_noTarget() {
+    MethodInvocation invocation =
+        AstFactory.methodInvocation2("test", [AstFactory.identifier3("arg0")]);
+    SimpleIdentifier identifier = invocation.methodName;
+    expect(identifier.isQualified, isFalse);
+  }
+
+  void test_isQualified_inMethodInvocation_withTarget() {
+    MethodInvocation invocation = AstFactory.methodInvocation(
+        AstFactory.identifier3("target"),
+        "test",
+        [AstFactory.identifier3("arg0")]);
+    SimpleIdentifier identifier = invocation.methodName;
+    expect(identifier.isQualified, isTrue);
+  }
+
+  void test_isQualified_inPrefixedIdentifier_name() {
+    SimpleIdentifier identifier = AstFactory.identifier3("test");
+    AstFactory.identifier4("prefix", identifier);
+    expect(identifier.isQualified, isTrue);
+  }
+
+  void test_isQualified_inPrefixedIdentifier_prefix() {
+    SimpleIdentifier identifier = AstFactory.identifier3("test");
+    AstFactory.identifier(identifier, AstFactory.identifier3("name"));
+    expect(identifier.isQualified, isFalse);
+  }
+
+  void test_isQualified_inPropertyAccess_name() {
+    SimpleIdentifier identifier = AstFactory.identifier3("test");
+    AstFactory.propertyAccess(AstFactory.identifier3("target"), identifier);
+    expect(identifier.isQualified, isTrue);
+  }
+
+  void test_isQualified_inPropertyAccess_target() {
+    SimpleIdentifier identifier = AstFactory.identifier3("test");
+    AstFactory.propertyAccess(identifier, AstFactory.identifier3("name"));
+    expect(identifier.isQualified, isFalse);
+  }
+
+  void test_isQualified_inReturnStatement() {
+    SimpleIdentifier identifier = AstFactory.identifier3("test");
+    AstFactory.returnStatement2(identifier);
+    expect(identifier.isQualified, isFalse);
+  }
+
+  SimpleIdentifier _createIdentifier(
+      WrapperKind wrapper, AssignmentKind assignment) {
+    SimpleIdentifier identifier = AstFactory.identifier3("a");
+    Expression expression = identifier;
+    while (true) {
+      if (wrapper == WrapperKind.PREFIXED_LEFT) {
+        expression =
+            AstFactory.identifier(identifier, AstFactory.identifier3("_"));
+      } else if (wrapper == WrapperKind.PREFIXED_RIGHT) {
+        expression =
+            AstFactory.identifier(AstFactory.identifier3("_"), identifier);
+      } else if (wrapper == WrapperKind.PROPERTY_LEFT) {
+        expression = AstFactory.propertyAccess2(expression, "_");
+      } else if (wrapper == WrapperKind.PROPERTY_RIGHT) {
+        expression =
+            AstFactory.propertyAccess(AstFactory.identifier3("_"), identifier);
+      } else if (wrapper == WrapperKind.NONE) {}
+      break;
+    }
+    while (true) {
+      if (assignment == AssignmentKind.BINARY) {
+        AstFactory.binaryExpression(
+            expression, TokenType.PLUS, AstFactory.identifier3("_"));
+      } else if (assignment == AssignmentKind.COMPOUND_LEFT) {
+        AstFactory.assignmentExpression(
+            expression, TokenType.PLUS_EQ, AstFactory.identifier3("_"));
+      } else if (assignment == AssignmentKind.COMPOUND_RIGHT) {
+        AstFactory.assignmentExpression(
+            AstFactory.identifier3("_"), TokenType.PLUS_EQ, expression);
+      } else if (assignment == AssignmentKind.POSTFIX_INC) {
+        AstFactory.postfixExpression(expression, TokenType.PLUS_PLUS);
+      } else if (assignment == AssignmentKind.PREFIX_DEC) {
+        AstFactory.prefixExpression(TokenType.MINUS_MINUS, expression);
+      } else if (assignment == AssignmentKind.PREFIX_INC) {
+        AstFactory.prefixExpression(TokenType.PLUS_PLUS, expression);
+      } else if (assignment == AssignmentKind.PREFIX_NOT) {
+        AstFactory.prefixExpression(TokenType.BANG, expression);
+      } else if (assignment == AssignmentKind.SIMPLE_LEFT) {
+        AstFactory.assignmentExpression(
+            expression, TokenType.EQ, AstFactory.identifier3("_"));
+      } else if (assignment == AssignmentKind.SIMPLE_RIGHT) {
+        AstFactory.assignmentExpression(
+            AstFactory.identifier3("_"), TokenType.EQ, expression);
+      } else if (assignment == AssignmentKind.NONE) {}
+      break;
+    }
+    return identifier;
+  }
+
+  /**
+   * Return the top-most node in the AST structure containing the given identifier.
+   *
+   * @param identifier the identifier in the AST structure being traversed
+   * @return the root of the AST structure containing the identifier
+   */
+  AstNode _topMostNode(SimpleIdentifier identifier) {
+    AstNode child = identifier;
+    AstNode parent = identifier.parent;
+    while (parent != null) {
+      child = parent;
+      parent = parent.parent;
+    }
+    return child;
+  }
+}
+
+@reflectiveTest
+class SimpleStringLiteralTest extends ParserTestCase {
+  void test_contentsEnd() {
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("'X'"), "X")
+            .contentsEnd,
+        2);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString('"X"'), "X")
+            .contentsEnd,
+        2);
+
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString('"""X"""'), "X")
+            .contentsEnd,
+        4);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("'''X'''"), "X")
+            .contentsEnd,
+        4);
+    expect(
+        new SimpleStringLiteral(
+            TokenFactory.tokenFromString("'''  \nX'''"), "X").contentsEnd,
+        7);
+
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r'X'"), "X")
+            .contentsEnd,
+        3);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString('r"X"'), "X")
+            .contentsEnd,
+        3);
+
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString('r"""X"""'), "X")
+            .contentsEnd,
+        5);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r'''X'''"), "X")
+            .contentsEnd,
+        5);
+    expect(
+        new SimpleStringLiteral(
+            TokenFactory.tokenFromString("r'''  \nX'''"), "X").contentsEnd,
+        8);
+  }
+
+  void test_contentsOffset() {
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("'X'"), "X")
+            .contentsOffset,
+        1);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("\"X\""), "X")
+            .contentsOffset,
+        1);
+    expect(
+        new SimpleStringLiteral(
+            TokenFactory.tokenFromString("\"\"\"X\"\"\""), "X").contentsOffset,
+        3);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("'''X'''"), "X")
+            .contentsOffset,
+        3);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r'X'"), "X")
+            .contentsOffset,
+        2);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r\"X\""), "X")
+            .contentsOffset,
+        2);
+    expect(
+        new SimpleStringLiteral(
+            TokenFactory.tokenFromString("r\"\"\"X\"\"\""), "X").contentsOffset,
+        4);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r'''X'''"), "X")
+            .contentsOffset,
+        4);
+    // leading whitespace
+    expect(
+        new SimpleStringLiteral(
+            TokenFactory.tokenFromString("''' \ \nX''"), "X").contentsOffset,
+        6);
+    expect(
+        new SimpleStringLiteral(
+            TokenFactory.tokenFromString('r""" \ \nX"""'), "X").contentsOffset,
+        7);
+  }
+
+  void test_isMultiline() {
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("'X'"), "X")
+            .isMultiline,
+        isFalse);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r'X'"), "X")
+            .isMultiline,
+        isFalse);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("\"X\""), "X")
+            .isMultiline,
+        isFalse);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r\"X\""), "X")
+            .isMultiline,
+        isFalse);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("'''X'''"), "X")
+            .isMultiline,
+        isTrue);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r'''X'''"), "X")
+            .isMultiline,
+        isTrue);
+    expect(
+        new SimpleStringLiteral(
+            TokenFactory.tokenFromString("\"\"\"X\"\"\""), "X").isMultiline,
+        isTrue);
+    expect(
+        new SimpleStringLiteral(
+            TokenFactory.tokenFromString("r\"\"\"X\"\"\""), "X").isMultiline,
+        isTrue);
+  }
+
+  void test_isRaw() {
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("'X'"), "X").isRaw,
+        isFalse);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("\"X\""), "X")
+            .isRaw,
+        isFalse);
+    expect(
+        new SimpleStringLiteral(
+            TokenFactory.tokenFromString("\"\"\"X\"\"\""), "X").isRaw,
+        isFalse);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("'''X'''"), "X")
+            .isRaw,
+        isFalse);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r'X'"), "X")
+            .isRaw,
+        isTrue);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r\"X\""), "X")
+            .isRaw,
+        isTrue);
+    expect(
+        new SimpleStringLiteral(
+            TokenFactory.tokenFromString("r\"\"\"X\"\"\""), "X").isRaw,
+        isTrue);
+    expect(
+        new SimpleStringLiteral(TokenFactory.tokenFromString("r'''X'''"), "X")
+            .isRaw,
+        isTrue);
+  }
+
+  void test_isSingleQuoted() {
+    // '
+    {
+      var token = TokenFactory.tokenFromString("'X'");
+      var node = new SimpleStringLiteral(token, null);
+      expect(node.isSingleQuoted, isTrue);
+    }
+    // '''
+    {
+      var token = TokenFactory.tokenFromString("'''X'''");
+      var node = new SimpleStringLiteral(token, null);
+      expect(node.isSingleQuoted, isTrue);
+    }
+    // "
+    {
+      var token = TokenFactory.tokenFromString('"X"');
+      var node = new SimpleStringLiteral(token, null);
+      expect(node.isSingleQuoted, isFalse);
+    }
+    // """
+    {
+      var token = TokenFactory.tokenFromString('"""X"""');
+      var node = new SimpleStringLiteral(token, null);
+      expect(node.isSingleQuoted, isFalse);
+    }
+  }
+
+  void test_isSingleQuoted_raw() {
+    // r'
+    {
+      var token = TokenFactory.tokenFromString("r'X'");
+      var node = new SimpleStringLiteral(token, null);
+      expect(node.isSingleQuoted, isTrue);
+    }
+    // r'''
+    {
+      var token = TokenFactory.tokenFromString("r'''X'''");
+      var node = new SimpleStringLiteral(token, null);
+      expect(node.isSingleQuoted, isTrue);
+    }
+    // r"
+    {
+      var token = TokenFactory.tokenFromString('r"X"');
+      var node = new SimpleStringLiteral(token, null);
+      expect(node.isSingleQuoted, isFalse);
+    }
+    // r"""
+    {
+      var token = TokenFactory.tokenFromString('r"""X"""');
+      var node = new SimpleStringLiteral(token, null);
+      expect(node.isSingleQuoted, isFalse);
+    }
+  }
+
+  void test_simple() {
+    Token token = TokenFactory.tokenFromString("'value'");
+    SimpleStringLiteral stringLiteral = new SimpleStringLiteral(token, "value");
+    expect(stringLiteral.literal, same(token));
+    expect(stringLiteral.beginToken, same(token));
+    expect(stringLiteral.endToken, same(token));
+    expect(stringLiteral.value, "value");
+  }
+}
+
+@reflectiveTest
+class StringInterpolationTest extends ParserTestCase {
+  void test_contentsOffsetEnd() {
+    AstFactory.interpolationExpression(AstFactory.identifier3('bb'));
+    // 'a${bb}ccc'
+    {
+      var ae = AstFactory.interpolationString("'a", "a");
+      var cToken = new StringToken(TokenType.STRING, "ccc'", 10);
+      var cElement = new InterpolationString(cToken, 'ccc');
+      StringInterpolation node = AstFactory.string([ae, ae, cElement]);
+      expect(node.contentsOffset, 1);
+      expect(node.contentsEnd, 10 + 4 - 1);
+    }
+    // '''a${bb}ccc'''
+    {
+      var ae = AstFactory.interpolationString("'''a", "a");
+      var cToken = new StringToken(TokenType.STRING, "ccc'''", 10);
+      var cElement = new InterpolationString(cToken, 'ccc');
+      StringInterpolation node = AstFactory.string([ae, ae, cElement]);
+      expect(node.contentsOffset, 3);
+      expect(node.contentsEnd, 10 + 4 - 1);
+    }
+    // """a${bb}ccc"""
+    {
+      var ae = AstFactory.interpolationString('"""a', "a");
+      var cToken = new StringToken(TokenType.STRING, 'ccc"""', 10);
+      var cElement = new InterpolationString(cToken, 'ccc');
+      StringInterpolation node = AstFactory.string([ae, ae, cElement]);
+      expect(node.contentsOffset, 3);
+      expect(node.contentsEnd, 10 + 4 - 1);
+    }
+    // r'a${bb}ccc'
+    {
+      var ae = AstFactory.interpolationString("r'a", "a");
+      var cToken = new StringToken(TokenType.STRING, "ccc'", 10);
+      var cElement = new InterpolationString(cToken, 'ccc');
+      StringInterpolation node = AstFactory.string([ae, ae, cElement]);
+      expect(node.contentsOffset, 2);
+      expect(node.contentsEnd, 10 + 4 - 1);
+    }
+    // r'''a${bb}ccc'''
+    {
+      var ae = AstFactory.interpolationString("r'''a", "a");
+      var cToken = new StringToken(TokenType.STRING, "ccc'''", 10);
+      var cElement = new InterpolationString(cToken, 'ccc');
+      StringInterpolation node = AstFactory.string([ae, ae, cElement]);
+      expect(node.contentsOffset, 4);
+      expect(node.contentsEnd, 10 + 4 - 1);
+    }
+    // r"""a${bb}ccc"""
+    {
+      var ae = AstFactory.interpolationString('r"""a', "a");
+      var cToken = new StringToken(TokenType.STRING, 'ccc"""', 10);
+      var cElement = new InterpolationString(cToken, 'ccc');
+      StringInterpolation node = AstFactory.string([ae, ae, cElement]);
+      expect(node.contentsOffset, 4);
+      expect(node.contentsEnd, 10 + 4 - 1);
+    }
+  }
+
+  void test_isMultiline() {
+    var b = AstFactory.interpolationExpression(AstFactory.identifier3('bb'));
+    // '
+    {
+      var a = AstFactory.interpolationString("'a", "a");
+      var c = AstFactory.interpolationString("ccc'", "ccc");
+      StringInterpolation node = AstFactory.string([a, b, c]);
+      expect(node.isMultiline, isFalse);
+    }
+    // '''
+    {
+      var a = AstFactory.interpolationString("'''a", "a");
+      var c = AstFactory.interpolationString("ccc'''", "ccc");
+      StringInterpolation node = AstFactory.string([a, b, c]);
+      expect(node.isMultiline, isTrue);
+    }
+    // "
+    {
+      var a = AstFactory.interpolationString('"a', "a");
+      var c = AstFactory.interpolationString('ccc"', "ccc");
+      StringInterpolation node = AstFactory.string([a, b, c]);
+      expect(node.isMultiline, isFalse);
+    }
+    // """
+    {
+      var a = AstFactory.interpolationString('"""a', "a");
+      var c = AstFactory.interpolationString('ccc"""', "ccc");
+      StringInterpolation node = AstFactory.string([a, b, c]);
+      expect(node.isMultiline, isTrue);
+    }
+  }
+
+  void test_isRaw() {
+    StringInterpolation node = AstFactory.string();
+    expect(node.isRaw, isFalse);
+  }
+
+  void test_isSingleQuoted() {
+    var b = AstFactory.interpolationExpression(AstFactory.identifier3('bb'));
+    // "
+    {
+      var a = AstFactory.interpolationString('"a', "a");
+      var c = AstFactory.interpolationString('ccc"', "ccc");
+      StringInterpolation node = AstFactory.string([a, b, c]);
+      expect(node.isSingleQuoted, isFalse);
+    }
+    // """
+    {
+      var a = AstFactory.interpolationString('"""a', "a");
+      var c = AstFactory.interpolationString('ccc"""', "ccc");
+      StringInterpolation node = AstFactory.string([a, b, c]);
+      expect(node.isSingleQuoted, isFalse);
+    }
+    // '
+    {
+      var a = AstFactory.interpolationString("'a", "a");
+      var c = AstFactory.interpolationString("ccc'", "ccc");
+      StringInterpolation node = AstFactory.string([a, b, c]);
+      expect(node.isSingleQuoted, isTrue);
+    }
+    // '''
+    {
+      var a = AstFactory.interpolationString("'''a", "a");
+      var c = AstFactory.interpolationString("ccc'''", "ccc");
+      StringInterpolation node = AstFactory.string([a, b, c]);
+      expect(node.isSingleQuoted, isTrue);
+    }
+  }
+}
+
+@reflectiveTest
+class ToSourceVisitorTest extends EngineTestCase {
+  void test_visitAdjacentStrings() {
+    _assertSource(
+        "'a' 'b'",
+        AstFactory.adjacentStrings(
+            [AstFactory.string2("a"), AstFactory.string2("b")]));
+  }
+
+  void test_visitAnnotation_constant() {
+    _assertSource("@A", AstFactory.annotation(AstFactory.identifier3("A")));
+  }
+
+  void test_visitAnnotation_constructor() {
+    _assertSource(
+        "@A.c()",
+        AstFactory.annotation2(AstFactory.identifier3("A"),
+            AstFactory.identifier3("c"), AstFactory.argumentList()));
+  }
+
+  void test_visitArgumentList() {
+    _assertSource(
+        "(a, b)",
+        AstFactory.argumentList(
+            [AstFactory.identifier3("a"), AstFactory.identifier3("b")]));
+  }
+
+  void test_visitAsExpression() {
+    _assertSource(
+        "e as T",
+        AstFactory.asExpression(
+            AstFactory.identifier3("e"), AstFactory.typeName4("T")));
+  }
+
+  void test_visitAssertStatement() {
+    _assertSource(
+        "assert (a);", AstFactory.assertStatement(AstFactory.identifier3("a")));
+  }
+
+  void test_visitAssignmentExpression() {
+    _assertSource(
+        "a = b",
+        AstFactory.assignmentExpression(AstFactory.identifier3("a"),
+            TokenType.EQ, AstFactory.identifier3("b")));
+  }
+
+  void test_visitAwaitExpression() {
+    _assertSource(
+        "await e", AstFactory.awaitExpression(AstFactory.identifier3("e")));
+  }
+
+  void test_visitBinaryExpression() {
+    _assertSource(
+        "a + b",
+        AstFactory.binaryExpression(AstFactory.identifier3("a"), TokenType.PLUS,
+            AstFactory.identifier3("b")));
+  }
+
+  void test_visitBlock_empty() {
+    _assertSource("{}", AstFactory.block());
+  }
+
+  void test_visitBlock_nonEmpty() {
+    _assertSource(
+        "{break; break;}",
+        AstFactory
+            .block([AstFactory.breakStatement(), AstFactory.breakStatement()]));
+  }
+
+  void test_visitBlockFunctionBody_async() {
+    _assertSource("async {}", AstFactory.asyncBlockFunctionBody());
+  }
+
+  void test_visitBlockFunctionBody_async_star() {
+    _assertSource("async* {}", AstFactory.asyncGeneratorBlockFunctionBody());
+  }
+
+  void test_visitBlockFunctionBody_simple() {
+    _assertSource("{}", AstFactory.blockFunctionBody2());
+  }
+
+  void test_visitBlockFunctionBody_sync() {
+    _assertSource("sync {}", AstFactory.syncBlockFunctionBody());
+  }
+
+  void test_visitBlockFunctionBody_sync_star() {
+    _assertSource("sync* {}", AstFactory.syncGeneratorBlockFunctionBody());
+  }
+
+  void test_visitBooleanLiteral_false() {
+    _assertSource("false", AstFactory.booleanLiteral(false));
+  }
+
+  void test_visitBooleanLiteral_true() {
+    _assertSource("true", AstFactory.booleanLiteral(true));
+  }
+
+  void test_visitBreakStatement_label() {
+    _assertSource("break l;", AstFactory.breakStatement2("l"));
+  }
+
+  void test_visitBreakStatement_noLabel() {
+    _assertSource("break;", AstFactory.breakStatement());
+  }
+
+  void test_visitCascadeExpression_field() {
+    _assertSource(
+        "a..b..c",
+        AstFactory.cascadeExpression(AstFactory.identifier3("a"), [
+          AstFactory.cascadedPropertyAccess("b"),
+          AstFactory.cascadedPropertyAccess("c")
+        ]));
+  }
+
+  void test_visitCascadeExpression_index() {
+    _assertSource(
+        "a..[0]..[1]",
+        AstFactory.cascadeExpression(AstFactory.identifier3("a"), [
+          AstFactory.cascadedIndexExpression(AstFactory.integer(0)),
+          AstFactory.cascadedIndexExpression(AstFactory.integer(1))
+        ]));
+  }
+
+  void test_visitCascadeExpression_method() {
+    _assertSource(
+        "a..b()..c()",
+        AstFactory.cascadeExpression(AstFactory.identifier3("a"), [
+          AstFactory.cascadedMethodInvocation("b"),
+          AstFactory.cascadedMethodInvocation("c")
+        ]));
+  }
+
+  void test_visitCatchClause_catch_noStack() {
+    _assertSource("catch (e) {}", AstFactory.catchClause("e"));
+  }
+
+  void test_visitCatchClause_catch_stack() {
+    _assertSource("catch (e, s) {}", AstFactory.catchClause2("e", "s"));
+  }
+
+  void test_visitCatchClause_on() {
+    _assertSource(
+        "on E {}", AstFactory.catchClause3(AstFactory.typeName4("E")));
+  }
+
+  void test_visitCatchClause_on_catch() {
+    _assertSource("on E catch (e) {}",
+        AstFactory.catchClause4(AstFactory.typeName4("E"), "e"));
+  }
+
+  void test_visitClassDeclaration_abstract() {
+    _assertSource(
+        "abstract class C {}",
+        AstFactory.classDeclaration(
+            Keyword.ABSTRACT, "C", null, null, null, null));
+  }
+
+  void test_visitClassDeclaration_empty() {
+    _assertSource("class C {}",
+        AstFactory.classDeclaration(null, "C", null, null, null, null));
+  }
+
+  void test_visitClassDeclaration_extends() {
+    _assertSource(
+        "class C extends A {}",
+        AstFactory.classDeclaration(null, "C", null,
+            AstFactory.extendsClause(AstFactory.typeName4("A")), null, null));
+  }
+
+  void test_visitClassDeclaration_extends_implements() {
+    _assertSource(
+        "class C extends A implements B {}",
+        AstFactory.classDeclaration(
+            null,
+            "C",
+            null,
+            AstFactory.extendsClause(AstFactory.typeName4("A")),
+            null,
+            AstFactory.implementsClause([AstFactory.typeName4("B")])));
+  }
+
+  void test_visitClassDeclaration_extends_with() {
+    _assertSource(
+        "class C extends A with M {}",
+        AstFactory.classDeclaration(
+            null,
+            "C",
+            null,
+            AstFactory.extendsClause(AstFactory.typeName4("A")),
+            AstFactory.withClause([AstFactory.typeName4("M")]),
+            null));
+  }
+
+  void test_visitClassDeclaration_extends_with_implements() {
+    _assertSource(
+        "class C extends A with M implements B {}",
+        AstFactory.classDeclaration(
+            null,
+            "C",
+            null,
+            AstFactory.extendsClause(AstFactory.typeName4("A")),
+            AstFactory.withClause([AstFactory.typeName4("M")]),
+            AstFactory.implementsClause([AstFactory.typeName4("B")])));
+  }
+
+  void test_visitClassDeclaration_implements() {
+    _assertSource(
+        "class C implements B {}",
+        AstFactory.classDeclaration(null, "C", null, null, null,
+            AstFactory.implementsClause([AstFactory.typeName4("B")])));
+  }
+
+  void test_visitClassDeclaration_multipleMember() {
+    _assertSource(
+        "class C {var a; var b;}",
+        AstFactory.classDeclaration(null, "C", null, null, null, null, [
+          AstFactory.fieldDeclaration2(
+              false, Keyword.VAR, [AstFactory.variableDeclaration("a")]),
+          AstFactory.fieldDeclaration2(
+              false, Keyword.VAR, [AstFactory.variableDeclaration("b")])
+        ]));
+  }
+
+  void test_visitClassDeclaration_parameters() {
+    _assertSource(
+        "class C<E> {}",
+        AstFactory.classDeclaration(
+            null, "C", AstFactory.typeParameterList(["E"]), null, null, null));
+  }
+
+  void test_visitClassDeclaration_parameters_extends() {
+    _assertSource(
+        "class C<E> extends A {}",
+        AstFactory.classDeclaration(
+            null,
+            "C",
+            AstFactory.typeParameterList(["E"]),
+            AstFactory.extendsClause(AstFactory.typeName4("A")),
+            null,
+            null));
+  }
+
+  void test_visitClassDeclaration_parameters_extends_implements() {
+    _assertSource(
+        "class C<E> extends A implements B {}",
+        AstFactory.classDeclaration(
+            null,
+            "C",
+            AstFactory.typeParameterList(["E"]),
+            AstFactory.extendsClause(AstFactory.typeName4("A")),
+            null,
+            AstFactory.implementsClause([AstFactory.typeName4("B")])));
+  }
+
+  void test_visitClassDeclaration_parameters_extends_with() {
+    _assertSource(
+        "class C<E> extends A with M {}",
+        AstFactory.classDeclaration(
+            null,
+            "C",
+            AstFactory.typeParameterList(["E"]),
+            AstFactory.extendsClause(AstFactory.typeName4("A")),
+            AstFactory.withClause([AstFactory.typeName4("M")]),
+            null));
+  }
+
+  void test_visitClassDeclaration_parameters_extends_with_implements() {
+    _assertSource(
+        "class C<E> extends A with M implements B {}",
+        AstFactory.classDeclaration(
+            null,
+            "C",
+            AstFactory.typeParameterList(["E"]),
+            AstFactory.extendsClause(AstFactory.typeName4("A")),
+            AstFactory.withClause([AstFactory.typeName4("M")]),
+            AstFactory.implementsClause([AstFactory.typeName4("B")])));
+  }
+
+  void test_visitClassDeclaration_parameters_implements() {
+    _assertSource(
+        "class C<E> implements B {}",
+        AstFactory.classDeclaration(
+            null,
+            "C",
+            AstFactory.typeParameterList(["E"]),
+            null,
+            null,
+            AstFactory.implementsClause([AstFactory.typeName4("B")])));
+  }
+
+  void test_visitClassDeclaration_singleMember() {
+    _assertSource(
+        "class C {var a;}",
+        AstFactory.classDeclaration(null, "C", null, null, null, null, [
+          AstFactory.fieldDeclaration2(
+              false, Keyword.VAR, [AstFactory.variableDeclaration("a")])
+        ]));
+  }
+
+  void test_visitClassDeclaration_withMetadata() {
+    ClassDeclaration declaration =
+        AstFactory.classDeclaration(null, "C", null, null, null, null);
+    declaration.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated class C {}", declaration);
+  }
+
+  void test_visitClassTypeAlias_abstract() {
+    _assertSource(
+        "abstract class C = S with M1;",
+        AstFactory.classTypeAlias(
+            "C",
+            null,
+            Keyword.ABSTRACT,
+            AstFactory.typeName4("S"),
+            AstFactory.withClause([AstFactory.typeName4("M1")]),
+            null));
+  }
+
+  void test_visitClassTypeAlias_abstract_implements() {
+    _assertSource(
+        "abstract class C = S with M1 implements I;",
+        AstFactory.classTypeAlias(
+            "C",
+            null,
+            Keyword.ABSTRACT,
+            AstFactory.typeName4("S"),
+            AstFactory.withClause([AstFactory.typeName4("M1")]),
+            AstFactory.implementsClause([AstFactory.typeName4("I")])));
+  }
+
+  void test_visitClassTypeAlias_generic() {
+    _assertSource(
+        "class C<E> = S<E> with M1<E>;",
+        AstFactory.classTypeAlias(
+            "C",
+            AstFactory.typeParameterList(["E"]),
+            null,
+            AstFactory.typeName4("S", [AstFactory.typeName4("E")]),
+            AstFactory.withClause([
+              AstFactory.typeName4("M1", [AstFactory.typeName4("E")])
+            ]),
+            null));
+  }
+
+  void test_visitClassTypeAlias_implements() {
+    _assertSource(
+        "class C = S with M1 implements I;",
+        AstFactory.classTypeAlias(
+            "C",
+            null,
+            null,
+            AstFactory.typeName4("S"),
+            AstFactory.withClause([AstFactory.typeName4("M1")]),
+            AstFactory.implementsClause([AstFactory.typeName4("I")])));
+  }
+
+  void test_visitClassTypeAlias_minimal() {
+    _assertSource(
+        "class C = S with M1;",
+        AstFactory.classTypeAlias("C", null, null, AstFactory.typeName4("S"),
+            AstFactory.withClause([AstFactory.typeName4("M1")]), null));
+  }
+
+  void test_visitClassTypeAlias_parameters_abstract() {
+    _assertSource(
+        "abstract class C<E> = S with M1;",
+        AstFactory.classTypeAlias(
+            "C",
+            AstFactory.typeParameterList(["E"]),
+            Keyword.ABSTRACT,
+            AstFactory.typeName4("S"),
+            AstFactory.withClause([AstFactory.typeName4("M1")]),
+            null));
+  }
+
+  void test_visitClassTypeAlias_parameters_abstract_implements() {
+    _assertSource(
+        "abstract class C<E> = S with M1 implements I;",
+        AstFactory.classTypeAlias(
+            "C",
+            AstFactory.typeParameterList(["E"]),
+            Keyword.ABSTRACT,
+            AstFactory.typeName4("S"),
+            AstFactory.withClause([AstFactory.typeName4("M1")]),
+            AstFactory.implementsClause([AstFactory.typeName4("I")])));
+  }
+
+  void test_visitClassTypeAlias_parameters_implements() {
+    _assertSource(
+        "class C<E> = S with M1 implements I;",
+        AstFactory.classTypeAlias(
+            "C",
+            AstFactory.typeParameterList(["E"]),
+            null,
+            AstFactory.typeName4("S"),
+            AstFactory.withClause([AstFactory.typeName4("M1")]),
+            AstFactory.implementsClause([AstFactory.typeName4("I")])));
+  }
+
+  void test_visitClassTypeAlias_withMetadata() {
+    ClassTypeAlias declaration = AstFactory.classTypeAlias(
+        "C",
+        null,
+        null,
+        AstFactory.typeName4("S"),
+        AstFactory.withClause([AstFactory.typeName4("M1")]),
+        null);
+    declaration.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated class C = S with M1;", declaration);
+  }
+
+  void test_visitComment() {
+    _assertSource(
+        "",
+        Comment.createBlockComment(
+            <Token>[TokenFactory.tokenFromString("/* comment */")]));
+  }
+
+  void test_visitCommentReference() {
+    _assertSource("", new CommentReference(null, AstFactory.identifier3("a")));
+  }
+
+  void test_visitCompilationUnit_declaration() {
+    _assertSource(
+        "var a;",
+        AstFactory.compilationUnit2([
+          AstFactory.topLevelVariableDeclaration2(
+              Keyword.VAR, [AstFactory.variableDeclaration("a")])
+        ]));
+  }
+
+  void test_visitCompilationUnit_directive() {
+    _assertSource("library l;",
+        AstFactory.compilationUnit3([AstFactory.libraryDirective2("l")]));
+  }
+
+  void test_visitCompilationUnit_directive_declaration() {
+    _assertSource(
+        "library l; var a;",
+        AstFactory.compilationUnit4([
+          AstFactory.libraryDirective2("l")
+        ], [
+          AstFactory.topLevelVariableDeclaration2(
+              Keyword.VAR, [AstFactory.variableDeclaration("a")])
+        ]));
+  }
+
+  void test_visitCompilationUnit_empty() {
+    _assertSource("", AstFactory.compilationUnit());
+  }
+
+  void test_visitCompilationUnit_script() {
+    _assertSource(
+        "!#/bin/dartvm", AstFactory.compilationUnit5("!#/bin/dartvm"));
+  }
+
+  void test_visitCompilationUnit_script_declaration() {
+    _assertSource(
+        "!#/bin/dartvm var a;",
+        AstFactory.compilationUnit6("!#/bin/dartvm", [
+          AstFactory.topLevelVariableDeclaration2(
+              Keyword.VAR, [AstFactory.variableDeclaration("a")])
+        ]));
+  }
+
+  void test_visitCompilationUnit_script_directive() {
+    _assertSource(
+        "!#/bin/dartvm library l;",
+        AstFactory.compilationUnit7(
+            "!#/bin/dartvm", [AstFactory.libraryDirective2("l")]));
+  }
+
+  void test_visitCompilationUnit_script_directives_declarations() {
+    _assertSource(
+        "!#/bin/dartvm library l; var a;",
+        AstFactory.compilationUnit8("!#/bin/dartvm", [
+          AstFactory.libraryDirective2("l")
+        ], [
+          AstFactory.topLevelVariableDeclaration2(
+              Keyword.VAR, [AstFactory.variableDeclaration("a")])
+        ]));
+  }
+
+  void test_visitConditionalExpression() {
+    _assertSource(
+        "a ? b : c",
+        AstFactory.conditionalExpression(AstFactory.identifier3("a"),
+            AstFactory.identifier3("b"), AstFactory.identifier3("c")));
+  }
+
+  void test_visitConstructorDeclaration_const() {
+    _assertSource(
+        "const C() {}",
+        AstFactory.constructorDeclaration2(
+            Keyword.CONST,
+            null,
+            AstFactory.identifier3("C"),
+            null,
+            AstFactory.formalParameterList(),
+            null,
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitConstructorDeclaration_external() {
+    _assertSource(
+        "external C();",
+        AstFactory.constructorDeclaration(AstFactory.identifier3("C"), null,
+            AstFactory.formalParameterList(), null));
+  }
+
+  void test_visitConstructorDeclaration_minimal() {
+    _assertSource(
+        "C() {}",
+        AstFactory.constructorDeclaration2(
+            null,
+            null,
+            AstFactory.identifier3("C"),
+            null,
+            AstFactory.formalParameterList(),
+            null,
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitConstructorDeclaration_multipleInitializers() {
+    _assertSource(
+        "C() : a = b, c = d {}",
+        AstFactory.constructorDeclaration2(
+            null,
+            null,
+            AstFactory.identifier3("C"),
+            null,
+            AstFactory.formalParameterList(),
+            [
+              AstFactory.constructorFieldInitializer(
+                  false, "a", AstFactory.identifier3("b")),
+              AstFactory.constructorFieldInitializer(
+                  false, "c", AstFactory.identifier3("d"))
+            ],
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitConstructorDeclaration_multipleParameters() {
+    _assertSource(
+        "C(var a, var b) {}",
+        AstFactory.constructorDeclaration2(
+            null,
+            null,
+            AstFactory.identifier3("C"),
+            null,
+            AstFactory.formalParameterList([
+              AstFactory.simpleFormalParameter(Keyword.VAR, "a"),
+              AstFactory.simpleFormalParameter(Keyword.VAR, "b")
+            ]),
+            null,
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitConstructorDeclaration_named() {
+    _assertSource(
+        "C.m() {}",
+        AstFactory.constructorDeclaration2(
+            null,
+            null,
+            AstFactory.identifier3("C"),
+            "m",
+            AstFactory.formalParameterList(),
+            null,
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitConstructorDeclaration_singleInitializer() {
+    _assertSource(
+        "C() : a = b {}",
+        AstFactory.constructorDeclaration2(
+            null,
+            null,
+            AstFactory.identifier3("C"),
+            null,
+            AstFactory.formalParameterList(),
+            [
+              AstFactory.constructorFieldInitializer(
+                  false, "a", AstFactory.identifier3("b"))
+            ],
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitConstructorDeclaration_withMetadata() {
+    ConstructorDeclaration declaration = AstFactory.constructorDeclaration2(
+        null,
+        null,
+        AstFactory.identifier3("C"),
+        null,
+        AstFactory.formalParameterList(),
+        null,
+        AstFactory.blockFunctionBody2());
+    declaration.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated C() {}", declaration);
+  }
+
+  void test_visitConstructorFieldInitializer_withoutThis() {
+    _assertSource(
+        "a = b",
+        AstFactory.constructorFieldInitializer(
+            false, "a", AstFactory.identifier3("b")));
+  }
+
+  void test_visitConstructorFieldInitializer_withThis() {
+    _assertSource(
+        "this.a = b",
+        AstFactory.constructorFieldInitializer(
+            true, "a", AstFactory.identifier3("b")));
+  }
+
+  void test_visitConstructorName_named_prefix() {
+    _assertSource("p.C.n",
+        AstFactory.constructorName(AstFactory.typeName4("p.C.n"), null));
+  }
+
+  void test_visitConstructorName_unnamed_noPrefix() {
+    _assertSource(
+        "C", AstFactory.constructorName(AstFactory.typeName4("C"), null));
+  }
+
+  void test_visitConstructorName_unnamed_prefix() {
+    _assertSource(
+        "p.C",
+        AstFactory.constructorName(
+            AstFactory.typeName3(AstFactory.identifier5("p", "C")), null));
+  }
+
+  void test_visitContinueStatement_label() {
+    _assertSource("continue l;", AstFactory.continueStatement("l"));
+  }
+
+  void test_visitContinueStatement_noLabel() {
+    _assertSource("continue;", AstFactory.continueStatement());
+  }
+
+  void test_visitDefaultFormalParameter_named_noValue() {
+    _assertSource(
+        "p",
+        AstFactory.namedFormalParameter(
+            AstFactory.simpleFormalParameter3("p"), null));
+  }
+
+  void test_visitDefaultFormalParameter_named_value() {
+    _assertSource(
+        "p : 0",
+        AstFactory.namedFormalParameter(
+            AstFactory.simpleFormalParameter3("p"), AstFactory.integer(0)));
+  }
+
+  void test_visitDefaultFormalParameter_positional_noValue() {
+    _assertSource(
+        "p",
+        AstFactory.positionalFormalParameter(
+            AstFactory.simpleFormalParameter3("p"), null));
+  }
+
+  void test_visitDefaultFormalParameter_positional_value() {
+    _assertSource(
+        "p = 0",
+        AstFactory.positionalFormalParameter(
+            AstFactory.simpleFormalParameter3("p"), AstFactory.integer(0)));
+  }
+
+  void test_visitDoStatement() {
+    _assertSource(
+        "do {} while (c);",
+        AstFactory.doStatement(
+            AstFactory.block(), AstFactory.identifier3("c")));
+  }
+
+  void test_visitDoubleLiteral() {
+    _assertSource("4.2", AstFactory.doubleLiteral(4.2));
+  }
+
+  void test_visitEmptyFunctionBody() {
+    _assertSource(";", AstFactory.emptyFunctionBody());
+  }
+
+  void test_visitEmptyStatement() {
+    _assertSource(";", AstFactory.emptyStatement());
+  }
+
+  void test_visitEnumDeclaration_multiple() {
+    _assertSource(
+        "enum E {ONE, TWO}", AstFactory.enumDeclaration2("E", ["ONE", "TWO"]));
+  }
+
+  void test_visitEnumDeclaration_single() {
+    _assertSource("enum E {ONE}", AstFactory.enumDeclaration2("E", ["ONE"]));
+  }
+
+  void test_visitExportDirective_combinator() {
+    _assertSource(
+        "export 'a.dart' show A;",
+        AstFactory.exportDirective2("a.dart", [
+          AstFactory.showCombinator([AstFactory.identifier3("A")])
+        ]));
+  }
+
+  void test_visitExportDirective_combinators() {
+    _assertSource(
+        "export 'a.dart' show A hide B;",
+        AstFactory.exportDirective2("a.dart", [
+          AstFactory.showCombinator([AstFactory.identifier3("A")]),
+          AstFactory.hideCombinator([AstFactory.identifier3("B")])
+        ]));
+  }
+
+  void test_visitExportDirective_minimal() {
+    _assertSource("export 'a.dart';", AstFactory.exportDirective2("a.dart"));
+  }
+
+  void test_visitExportDirective_withMetadata() {
+    ExportDirective directive = AstFactory.exportDirective2("a.dart");
+    directive.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated export 'a.dart';", directive);
+  }
+
+  void test_visitExpressionFunctionBody_async() {
+    _assertSource("async => a;",
+        AstFactory.asyncExpressionFunctionBody(AstFactory.identifier3("a")));
+  }
+
+  void test_visitExpressionFunctionBody_simple() {
+    _assertSource("=> a;",
+        AstFactory.expressionFunctionBody(AstFactory.identifier3("a")));
+  }
+
+  void test_visitExpressionStatement() {
+    _assertSource(
+        "a;", AstFactory.expressionStatement(AstFactory.identifier3("a")));
+  }
+
+  void test_visitExtendsClause() {
+    _assertSource(
+        "extends C", AstFactory.extendsClause(AstFactory.typeName4("C")));
+  }
+
+  void test_visitFieldDeclaration_instance() {
+    _assertSource(
+        "var a;",
+        AstFactory.fieldDeclaration2(
+            false, Keyword.VAR, [AstFactory.variableDeclaration("a")]));
+  }
+
+  void test_visitFieldDeclaration_static() {
+    _assertSource(
+        "static var a;",
+        AstFactory.fieldDeclaration2(
+            true, Keyword.VAR, [AstFactory.variableDeclaration("a")]));
+  }
+
+  void test_visitFieldDeclaration_withMetadata() {
+    FieldDeclaration declaration = AstFactory.fieldDeclaration2(
+        false, Keyword.VAR, [AstFactory.variableDeclaration("a")]);
+    declaration.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated var a;", declaration);
+  }
+
+  void test_visitFieldFormalParameter_functionTyped() {
+    _assertSource(
+        "A this.a(b)",
+        AstFactory.fieldFormalParameter(
+            null,
+            AstFactory.typeName4("A"),
+            "a",
+            AstFactory.formalParameterList(
+                [AstFactory.simpleFormalParameter3("b")])));
+  }
+
+  void test_visitFieldFormalParameter_functionTyped_typeParameters() {
+    _assertSource(
+        "A this.a<E, F>(b)",
+        new FieldFormalParameter(
+            null,
+            null,
+            null,
+            AstFactory.typeName4('A'),
+            TokenFactory.tokenFromKeyword(Keyword.THIS),
+            TokenFactory.tokenFromType(TokenType.PERIOD),
+            AstFactory.identifier3('a'),
+            AstFactory.typeParameterList(['E', 'F']),
+            AstFactory.formalParameterList(
+                [AstFactory.simpleFormalParameter3("b")])));
+  }
+
+  void test_visitFieldFormalParameter_keyword() {
+    _assertSource(
+        "var this.a", AstFactory.fieldFormalParameter(Keyword.VAR, null, "a"));
+  }
+
+  void test_visitFieldFormalParameter_keywordAndType() {
+    _assertSource(
+        "final A this.a",
+        AstFactory.fieldFormalParameter(
+            Keyword.FINAL, AstFactory.typeName4("A"), "a"));
+  }
+
+  void test_visitFieldFormalParameter_type() {
+    _assertSource("A this.a",
+        AstFactory.fieldFormalParameter(null, AstFactory.typeName4("A"), "a"));
+  }
+
+  void test_visitForEachStatement_declared() {
+    _assertSource(
+        "for (var a in b) {}",
+        AstFactory.forEachStatement(AstFactory.declaredIdentifier3("a"),
+            AstFactory.identifier3("b"), AstFactory.block()));
+  }
+
+  void test_visitForEachStatement_variable() {
+    _assertSource(
+        "for (a in b) {}",
+        new ForEachStatement.withReference(
+            null,
+            TokenFactory.tokenFromKeyword(Keyword.FOR),
+            TokenFactory.tokenFromType(TokenType.OPEN_PAREN),
+            AstFactory.identifier3("a"),
+            TokenFactory.tokenFromKeyword(Keyword.IN),
+            AstFactory.identifier3("b"),
+            TokenFactory.tokenFromType(TokenType.CLOSE_PAREN),
+            AstFactory.block()));
+  }
+
+  void test_visitForEachStatement_variable_await() {
+    _assertSource(
+        "await for (a in b) {}",
+        new ForEachStatement.withReference(
+            TokenFactory.tokenFromString("await"),
+            TokenFactory.tokenFromKeyword(Keyword.FOR),
+            TokenFactory.tokenFromType(TokenType.OPEN_PAREN),
+            AstFactory.identifier3("a"),
+            TokenFactory.tokenFromKeyword(Keyword.IN),
+            AstFactory.identifier3("b"),
+            TokenFactory.tokenFromType(TokenType.CLOSE_PAREN),
+            AstFactory.block()));
+  }
+
+  void test_visitFormalParameterList_empty() {
+    _assertSource("()", AstFactory.formalParameterList());
+  }
+
+  void test_visitFormalParameterList_n() {
+    _assertSource(
+        "({a : 0})",
+        AstFactory.formalParameterList([
+          AstFactory.namedFormalParameter(
+              AstFactory.simpleFormalParameter3("a"), AstFactory.integer(0))
+        ]));
+  }
+
+  void test_visitFormalParameterList_nn() {
+    _assertSource(
+        "({a : 0, b : 1})",
+        AstFactory.formalParameterList([
+          AstFactory.namedFormalParameter(
+              AstFactory.simpleFormalParameter3("a"), AstFactory.integer(0)),
+          AstFactory.namedFormalParameter(
+              AstFactory.simpleFormalParameter3("b"), AstFactory.integer(1))
+        ]));
+  }
+
+  void test_visitFormalParameterList_p() {
+    _assertSource(
+        "([a = 0])",
+        AstFactory.formalParameterList([
+          AstFactory.positionalFormalParameter(
+              AstFactory.simpleFormalParameter3("a"), AstFactory.integer(0))
+        ]));
+  }
+
+  void test_visitFormalParameterList_pp() {
+    _assertSource(
+        "([a = 0, b = 1])",
+        AstFactory.formalParameterList([
+          AstFactory.positionalFormalParameter(
+              AstFactory.simpleFormalParameter3("a"), AstFactory.integer(0)),
+          AstFactory.positionalFormalParameter(
+              AstFactory.simpleFormalParameter3("b"), AstFactory.integer(1))
+        ]));
+  }
+
+  void test_visitFormalParameterList_r() {
+    _assertSource(
+        "(a)",
+        AstFactory
+            .formalParameterList([AstFactory.simpleFormalParameter3("a")]));
+  }
+
+  void test_visitFormalParameterList_rn() {
+    _assertSource(
+        "(a, {b : 1})",
+        AstFactory.formalParameterList([
+          AstFactory.simpleFormalParameter3("a"),
+          AstFactory.namedFormalParameter(
+              AstFactory.simpleFormalParameter3("b"), AstFactory.integer(1))
+        ]));
+  }
+
+  void test_visitFormalParameterList_rnn() {
+    _assertSource(
+        "(a, {b : 1, c : 2})",
+        AstFactory.formalParameterList([
+          AstFactory.simpleFormalParameter3("a"),
+          AstFactory.namedFormalParameter(
+              AstFactory.simpleFormalParameter3("b"), AstFactory.integer(1)),
+          AstFactory.namedFormalParameter(
+              AstFactory.simpleFormalParameter3("c"), AstFactory.integer(2))
+        ]));
+  }
+
+  void test_visitFormalParameterList_rp() {
+    _assertSource(
+        "(a, [b = 1])",
+        AstFactory.formalParameterList([
+          AstFactory.simpleFormalParameter3("a"),
+          AstFactory.positionalFormalParameter(
+              AstFactory.simpleFormalParameter3("b"), AstFactory.integer(1))
+        ]));
+  }
+
+  void test_visitFormalParameterList_rpp() {
+    _assertSource(
+        "(a, [b = 1, c = 2])",
+        AstFactory.formalParameterList([
+          AstFactory.simpleFormalParameter3("a"),
+          AstFactory.positionalFormalParameter(
+              AstFactory.simpleFormalParameter3("b"), AstFactory.integer(1)),
+          AstFactory.positionalFormalParameter(
+              AstFactory.simpleFormalParameter3("c"), AstFactory.integer(2))
+        ]));
+  }
+
+  void test_visitFormalParameterList_rr() {
+    _assertSource(
+        "(a, b)",
+        AstFactory.formalParameterList([
+          AstFactory.simpleFormalParameter3("a"),
+          AstFactory.simpleFormalParameter3("b")
+        ]));
+  }
+
+  void test_visitFormalParameterList_rrn() {
+    _assertSource(
+        "(a, b, {c : 3})",
+        AstFactory.formalParameterList([
+          AstFactory.simpleFormalParameter3("a"),
+          AstFactory.simpleFormalParameter3("b"),
+          AstFactory.namedFormalParameter(
+              AstFactory.simpleFormalParameter3("c"), AstFactory.integer(3))
+        ]));
+  }
+
+  void test_visitFormalParameterList_rrnn() {
+    _assertSource(
+        "(a, b, {c : 3, d : 4})",
+        AstFactory.formalParameterList([
+          AstFactory.simpleFormalParameter3("a"),
+          AstFactory.simpleFormalParameter3("b"),
+          AstFactory.namedFormalParameter(
+              AstFactory.simpleFormalParameter3("c"), AstFactory.integer(3)),
+          AstFactory.namedFormalParameter(
+              AstFactory.simpleFormalParameter3("d"), AstFactory.integer(4))
+        ]));
+  }
+
+  void test_visitFormalParameterList_rrp() {
+    _assertSource(
+        "(a, b, [c = 3])",
+        AstFactory.formalParameterList([
+          AstFactory.simpleFormalParameter3("a"),
+          AstFactory.simpleFormalParameter3("b"),
+          AstFactory.positionalFormalParameter(
+              AstFactory.simpleFormalParameter3("c"), AstFactory.integer(3))
+        ]));
+  }
+
+  void test_visitFormalParameterList_rrpp() {
+    _assertSource(
+        "(a, b, [c = 3, d = 4])",
+        AstFactory.formalParameterList([
+          AstFactory.simpleFormalParameter3("a"),
+          AstFactory.simpleFormalParameter3("b"),
+          AstFactory.positionalFormalParameter(
+              AstFactory.simpleFormalParameter3("c"), AstFactory.integer(3)),
+          AstFactory.positionalFormalParameter(
+              AstFactory.simpleFormalParameter3("d"), AstFactory.integer(4))
+        ]));
+  }
+
+  void test_visitForStatement_c() {
+    _assertSource(
+        "for (; c;) {}",
+        AstFactory.forStatement(
+            null, AstFactory.identifier3("c"), null, AstFactory.block()));
+  }
+
+  void test_visitForStatement_cu() {
+    _assertSource(
+        "for (; c; u) {}",
+        AstFactory.forStatement(null, AstFactory.identifier3("c"),
+            [AstFactory.identifier3("u")], AstFactory.block()));
+  }
+
+  void test_visitForStatement_e() {
+    _assertSource(
+        "for (e;;) {}",
+        AstFactory.forStatement(
+            AstFactory.identifier3("e"), null, null, AstFactory.block()));
+  }
+
+  void test_visitForStatement_ec() {
+    _assertSource(
+        "for (e; c;) {}",
+        AstFactory.forStatement(AstFactory.identifier3("e"),
+            AstFactory.identifier3("c"), null, AstFactory.block()));
+  }
+
+  void test_visitForStatement_ecu() {
+    _assertSource(
+        "for (e; c; u) {}",
+        AstFactory.forStatement(
+            AstFactory.identifier3("e"),
+            AstFactory.identifier3("c"),
+            [AstFactory.identifier3("u")],
+            AstFactory.block()));
+  }
+
+  void test_visitForStatement_eu() {
+    _assertSource(
+        "for (e;; u) {}",
+        AstFactory.forStatement(AstFactory.identifier3("e"), null,
+            [AstFactory.identifier3("u")], AstFactory.block()));
+  }
+
+  void test_visitForStatement_i() {
+    _assertSource(
+        "for (var i;;) {}",
+        AstFactory.forStatement2(
+            AstFactory.variableDeclarationList2(
+                Keyword.VAR, [AstFactory.variableDeclaration("i")]),
+            null,
+            null,
+            AstFactory.block()));
+  }
+
+  void test_visitForStatement_ic() {
+    _assertSource(
+        "for (var i; c;) {}",
+        AstFactory.forStatement2(
+            AstFactory.variableDeclarationList2(
+                Keyword.VAR, [AstFactory.variableDeclaration("i")]),
+            AstFactory.identifier3("c"),
+            null,
+            AstFactory.block()));
+  }
+
+  void test_visitForStatement_icu() {
+    _assertSource(
+        "for (var i; c; u) {}",
+        AstFactory.forStatement2(
+            AstFactory.variableDeclarationList2(
+                Keyword.VAR, [AstFactory.variableDeclaration("i")]),
+            AstFactory.identifier3("c"),
+            [AstFactory.identifier3("u")],
+            AstFactory.block()));
+  }
+
+  void test_visitForStatement_iu() {
+    _assertSource(
+        "for (var i;; u) {}",
+        AstFactory.forStatement2(
+            AstFactory.variableDeclarationList2(
+                Keyword.VAR, [AstFactory.variableDeclaration("i")]),
+            null,
+            [AstFactory.identifier3("u")],
+            AstFactory.block()));
+  }
+
+  void test_visitForStatement_u() {
+    _assertSource(
+        "for (;; u) {}",
+        AstFactory.forStatement(
+            null, null, [AstFactory.identifier3("u")], AstFactory.block()));
+  }
+
+  void test_visitFunctionDeclaration_external() {
+    FunctionDeclaration functionDeclaration = AstFactory.functionDeclaration(
+        null,
+        null,
+        "f",
+        AstFactory.functionExpression2(
+            AstFactory.formalParameterList(), AstFactory.emptyFunctionBody()));
+    functionDeclaration.externalKeyword =
+        TokenFactory.tokenFromKeyword(Keyword.EXTERNAL);
+    _assertSource("external f();", functionDeclaration);
+  }
+
+  void test_visitFunctionDeclaration_getter() {
+    _assertSource(
+        "get f() {}",
+        AstFactory.functionDeclaration(
+            null, Keyword.GET, "f", AstFactory.functionExpression()));
+  }
+
+  void test_visitFunctionDeclaration_local_blockBody() {
+    FunctionDeclaration f = AstFactory.functionDeclaration(
+        null, null, "f", AstFactory.functionExpression());
+    FunctionDeclarationStatement fStatement =
+        new FunctionDeclarationStatement(f);
+    _assertSource(
+        "main() {f() {} 42;}",
+        AstFactory.functionDeclaration(
+            null,
+            null,
+            "main",
+            AstFactory.functionExpression2(
+                AstFactory.formalParameterList(),
+                AstFactory.blockFunctionBody2([
+                  fStatement,
+                  AstFactory.expressionStatement(AstFactory.integer(42))
+                ]))));
+  }
+
+  void test_visitFunctionDeclaration_local_expressionBody() {
+    FunctionDeclaration f = AstFactory.functionDeclaration(
+        null,
+        null,
+        "f",
+        AstFactory.functionExpression2(AstFactory.formalParameterList(),
+            AstFactory.expressionFunctionBody(AstFactory.integer(1))));
+    FunctionDeclarationStatement fStatement =
+        new FunctionDeclarationStatement(f);
+    _assertSource(
+        "main() {f() => 1; 2;}",
+        AstFactory.functionDeclaration(
+            null,
+            null,
+            "main",
+            AstFactory.functionExpression2(
+                AstFactory.formalParameterList(),
+                AstFactory.blockFunctionBody2([
+                  fStatement,
+                  AstFactory.expressionStatement(AstFactory.integer(2))
+                ]))));
+  }
+
+  void test_visitFunctionDeclaration_normal() {
+    _assertSource(
+        "f() {}",
+        AstFactory.functionDeclaration(
+            null, null, "f", AstFactory.functionExpression()));
+  }
+
+  void test_visitFunctionDeclaration_setter() {
+    _assertSource(
+        "set f() {}",
+        AstFactory.functionDeclaration(
+            null, Keyword.SET, "f", AstFactory.functionExpression()));
+  }
+
+  void test_visitFunctionDeclaration_typeParameters() {
+    _assertSource(
+        "f<E>() {}",
+        AstFactory.functionDeclaration(
+            null,
+            null,
+            "f",
+            AstFactory.functionExpression3(
+                AstFactory.typeParameterList(['E']),
+                AstFactory.formalParameterList(),
+                AstFactory.blockFunctionBody2())));
+  }
+
+  void test_visitFunctionDeclaration_withMetadata() {
+    FunctionDeclaration declaration = AstFactory.functionDeclaration(
+        null, null, "f", AstFactory.functionExpression());
+    declaration.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated f() {}", declaration);
+  }
+
+  void test_visitFunctionDeclarationStatement() {
+    _assertSource(
+        "f() {}",
+        AstFactory.functionDeclarationStatement(
+            null, null, "f", AstFactory.functionExpression()));
+  }
+
+  void test_visitFunctionExpression() {
+    _assertSource("() {}", AstFactory.functionExpression());
+  }
+
+  void test_visitFunctionExpression_typeParameters() {
+    _assertSource(
+        "<E>() {}",
+        AstFactory.functionExpression3(AstFactory.typeParameterList(['E']),
+            AstFactory.formalParameterList(), AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitFunctionExpressionInvocation_minimal() {
+    _assertSource("f()",
+        AstFactory.functionExpressionInvocation(AstFactory.identifier3("f")));
+  }
+
+  void test_visitFunctionExpressionInvocation_typeArguments() {
+    _assertSource(
+        "f<A>()",
+        AstFactory.functionExpressionInvocation2(AstFactory.identifier3("f"),
+            AstFactory.typeArgumentList([AstFactory.typeName4('A')])));
+  }
+
+  void test_visitFunctionTypeAlias_generic() {
+    _assertSource(
+        "typedef A F<B>();",
+        AstFactory.typeAlias(
+            AstFactory.typeName4("A"),
+            "F",
+            AstFactory.typeParameterList(["B"]),
+            AstFactory.formalParameterList()));
+  }
+
+  void test_visitFunctionTypeAlias_nonGeneric() {
+    _assertSource(
+        "typedef A F();",
+        AstFactory.typeAlias(AstFactory.typeName4("A"), "F", null,
+            AstFactory.formalParameterList()));
+  }
+
+  void test_visitFunctionTypeAlias_withMetadata() {
+    FunctionTypeAlias declaration = AstFactory.typeAlias(
+        AstFactory.typeName4("A"), "F", null, AstFactory.formalParameterList());
+    declaration.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated typedef A F();", declaration);
+  }
+
+  void test_visitFunctionTypedFormalParameter_noType() {
+    _assertSource("f()", AstFactory.functionTypedFormalParameter(null, "f"));
+  }
+
+  void test_visitFunctionTypedFormalParameter_type() {
+    _assertSource(
+        "T f()",
+        AstFactory.functionTypedFormalParameter(
+            AstFactory.typeName4("T"), "f"));
+  }
+
+  void test_visitFunctionTypedFormalParameter_typeParameters() {
+    _assertSource(
+        "T f<E>()",
+        new FunctionTypedFormalParameter(
+            null,
+            null,
+            AstFactory.typeName4("T"),
+            AstFactory.identifier3('f'),
+            AstFactory.typeParameterList(['E']),
+            AstFactory.formalParameterList([])));
+  }
+
+  void test_visitIfStatement_withElse() {
+    _assertSource(
+        "if (c) {} else {}",
+        AstFactory.ifStatement2(AstFactory.identifier3("c"), AstFactory.block(),
+            AstFactory.block()));
+  }
+
+  void test_visitIfStatement_withoutElse() {
+    _assertSource(
+        "if (c) {}",
+        AstFactory.ifStatement(
+            AstFactory.identifier3("c"), AstFactory.block()));
+  }
+
+  void test_visitImplementsClause_multiple() {
+    _assertSource(
+        "implements A, B",
+        AstFactory.implementsClause(
+            [AstFactory.typeName4("A"), AstFactory.typeName4("B")]));
+  }
+
+  void test_visitImplementsClause_single() {
+    _assertSource("implements A",
+        AstFactory.implementsClause([AstFactory.typeName4("A")]));
+  }
+
+  void test_visitImportDirective_combinator() {
+    _assertSource(
+        "import 'a.dart' show A;",
+        AstFactory.importDirective3("a.dart", null, [
+          AstFactory.showCombinator([AstFactory.identifier3("A")])
+        ]));
+  }
+
+  void test_visitImportDirective_combinators() {
+    _assertSource(
+        "import 'a.dart' show A hide B;",
+        AstFactory.importDirective3("a.dart", null, [
+          AstFactory.showCombinator([AstFactory.identifier3("A")]),
+          AstFactory.hideCombinator([AstFactory.identifier3("B")])
+        ]));
+  }
+
+  void test_visitImportDirective_deferred() {
+    _assertSource("import 'a.dart' deferred as p;",
+        AstFactory.importDirective2("a.dart", true, "p"));
+  }
+
+  void test_visitImportDirective_minimal() {
+    _assertSource(
+        "import 'a.dart';", AstFactory.importDirective3("a.dart", null));
+  }
+
+  void test_visitImportDirective_prefix() {
+    _assertSource(
+        "import 'a.dart' as p;", AstFactory.importDirective3("a.dart", "p"));
+  }
+
+  void test_visitImportDirective_prefix_combinator() {
+    _assertSource(
+        "import 'a.dart' as p show A;",
+        AstFactory.importDirective3("a.dart", "p", [
+          AstFactory.showCombinator([AstFactory.identifier3("A")])
+        ]));
+  }
+
+  void test_visitImportDirective_prefix_combinators() {
+    _assertSource(
+        "import 'a.dart' as p show A hide B;",
+        AstFactory.importDirective3("a.dart", "p", [
+          AstFactory.showCombinator([AstFactory.identifier3("A")]),
+          AstFactory.hideCombinator([AstFactory.identifier3("B")])
+        ]));
+  }
+
+  void test_visitImportDirective_withMetadata() {
+    ImportDirective directive = AstFactory.importDirective3("a.dart", null);
+    directive.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated import 'a.dart';", directive);
+  }
+
+  void test_visitImportHideCombinator_multiple() {
+    _assertSource(
+        "hide a, b",
+        AstFactory.hideCombinator(
+            [AstFactory.identifier3("a"), AstFactory.identifier3("b")]));
+  }
+
+  void test_visitImportHideCombinator_single() {
+    _assertSource(
+        "hide a", AstFactory.hideCombinator([AstFactory.identifier3("a")]));
+  }
+
+  void test_visitImportShowCombinator_multiple() {
+    _assertSource(
+        "show a, b",
+        AstFactory.showCombinator(
+            [AstFactory.identifier3("a"), AstFactory.identifier3("b")]));
+  }
+
+  void test_visitImportShowCombinator_single() {
+    _assertSource(
+        "show a", AstFactory.showCombinator([AstFactory.identifier3("a")]));
+  }
+
+  void test_visitIndexExpression() {
+    _assertSource(
+        "a[i]",
+        AstFactory.indexExpression(
+            AstFactory.identifier3("a"), AstFactory.identifier3("i")));
+  }
+
+  void test_visitInstanceCreationExpression_const() {
+    _assertSource(
+        "const C()",
+        AstFactory.instanceCreationExpression2(
+            Keyword.CONST, AstFactory.typeName4("C")));
+  }
+
+  void test_visitInstanceCreationExpression_named() {
+    _assertSource(
+        "new C.c()",
+        AstFactory.instanceCreationExpression3(
+            Keyword.NEW, AstFactory.typeName4("C"), "c"));
+  }
+
+  void test_visitInstanceCreationExpression_unnamed() {
+    _assertSource(
+        "new C()",
+        AstFactory.instanceCreationExpression2(
+            Keyword.NEW, AstFactory.typeName4("C")));
+  }
+
+  void test_visitIntegerLiteral() {
+    _assertSource("42", AstFactory.integer(42));
+  }
+
+  void test_visitInterpolationExpression_expression() {
+    _assertSource("\${a}",
+        AstFactory.interpolationExpression(AstFactory.identifier3("a")));
+  }
+
+  void test_visitInterpolationExpression_identifier() {
+    _assertSource("\$a", AstFactory.interpolationExpression2("a"));
+  }
+
+  void test_visitInterpolationString() {
+    _assertSource("'x", AstFactory.interpolationString("'x", "x"));
+  }
+
+  void test_visitIsExpression_negated() {
+    _assertSource(
+        "a is! C",
+        AstFactory.isExpression(
+            AstFactory.identifier3("a"), true, AstFactory.typeName4("C")));
+  }
+
+  void test_visitIsExpression_normal() {
+    _assertSource(
+        "a is C",
+        AstFactory.isExpression(
+            AstFactory.identifier3("a"), false, AstFactory.typeName4("C")));
+  }
+
+  void test_visitLabel() {
+    _assertSource("a:", AstFactory.label2("a"));
+  }
+
+  void test_visitLabeledStatement_multiple() {
+    _assertSource(
+        "a: b: return;",
+        AstFactory.labeledStatement(
+            [AstFactory.label2("a"), AstFactory.label2("b")],
+            AstFactory.returnStatement()));
+  }
+
+  void test_visitLabeledStatement_single() {
+    _assertSource(
+        "a: return;",
+        AstFactory.labeledStatement(
+            [AstFactory.label2("a")], AstFactory.returnStatement()));
+  }
+
+  void test_visitLibraryDirective() {
+    _assertSource("library l;", AstFactory.libraryDirective2("l"));
+  }
+
+  void test_visitLibraryDirective_withMetadata() {
+    LibraryDirective directive = AstFactory.libraryDirective2("l");
+    directive.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated library l;", directive);
+  }
+
+  void test_visitLibraryIdentifier_multiple() {
+    _assertSource(
+        "a.b.c",
+        AstFactory.libraryIdentifier([
+          AstFactory.identifier3("a"),
+          AstFactory.identifier3("b"),
+          AstFactory.identifier3("c")
+        ]));
+  }
+
+  void test_visitLibraryIdentifier_single() {
+    _assertSource(
+        "a", AstFactory.libraryIdentifier([AstFactory.identifier3("a")]));
+  }
+
+  void test_visitListLiteral_const() {
+    _assertSource("const []", AstFactory.listLiteral2(Keyword.CONST, null));
+  }
+
+  void test_visitListLiteral_empty() {
+    _assertSource("[]", AstFactory.listLiteral());
+  }
+
+  void test_visitListLiteral_nonEmpty() {
+    _assertSource(
+        "[a, b, c]",
+        AstFactory.listLiteral([
+          AstFactory.identifier3("a"),
+          AstFactory.identifier3("b"),
+          AstFactory.identifier3("c")
+        ]));
+  }
+
+  void test_visitMapLiteral_const() {
+    _assertSource("const {}", AstFactory.mapLiteral(Keyword.CONST, null));
+  }
+
+  void test_visitMapLiteral_empty() {
+    _assertSource("{}", AstFactory.mapLiteral2());
+  }
+
+  void test_visitMapLiteral_nonEmpty() {
+    _assertSource(
+        "{'a' : a, 'b' : b, 'c' : c}",
+        AstFactory.mapLiteral2([
+          AstFactory.mapLiteralEntry("a", AstFactory.identifier3("a")),
+          AstFactory.mapLiteralEntry("b", AstFactory.identifier3("b")),
+          AstFactory.mapLiteralEntry("c", AstFactory.identifier3("c"))
+        ]));
+  }
+
+  void test_visitMapLiteralEntry() {
+    _assertSource("'a' : b",
+        AstFactory.mapLiteralEntry("a", AstFactory.identifier3("b")));
+  }
+
+  void test_visitMethodDeclaration_external() {
+    _assertSource(
+        "external m();",
+        AstFactory.methodDeclaration(null, null, null, null,
+            AstFactory.identifier3("m"), AstFactory.formalParameterList()));
+  }
+
+  void test_visitMethodDeclaration_external_returnType() {
+    _assertSource(
+        "external T m();",
+        AstFactory.methodDeclaration(
+            null,
+            AstFactory.typeName4("T"),
+            null,
+            null,
+            AstFactory.identifier3("m"),
+            AstFactory.formalParameterList()));
+  }
+
+  void test_visitMethodDeclaration_getter() {
+    _assertSource(
+        "get m {}",
+        AstFactory.methodDeclaration2(
+            null,
+            null,
+            Keyword.GET,
+            null,
+            AstFactory.identifier3("m"),
+            null,
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_getter_returnType() {
+    _assertSource(
+        "T get m {}",
+        AstFactory.methodDeclaration2(
+            null,
+            AstFactory.typeName4("T"),
+            Keyword.GET,
+            null,
+            AstFactory.identifier3("m"),
+            null,
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_getter_seturnType() {
+    _assertSource(
+        "T set m(var v) {}",
+        AstFactory.methodDeclaration2(
+            null,
+            AstFactory.typeName4("T"),
+            Keyword.SET,
+            null,
+            AstFactory.identifier3("m"),
+            AstFactory.formalParameterList(
+                [AstFactory.simpleFormalParameter(Keyword.VAR, "v")]),
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_minimal() {
+    _assertSource(
+        "m() {}",
+        AstFactory.methodDeclaration2(
+            null,
+            null,
+            null,
+            null,
+            AstFactory.identifier3("m"),
+            AstFactory.formalParameterList(),
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_multipleParameters() {
+    _assertSource(
+        "m(var a, var b) {}",
+        AstFactory.methodDeclaration2(
+            null,
+            null,
+            null,
+            null,
+            AstFactory.identifier3("m"),
+            AstFactory.formalParameterList([
+              AstFactory.simpleFormalParameter(Keyword.VAR, "a"),
+              AstFactory.simpleFormalParameter(Keyword.VAR, "b")
+            ]),
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_operator() {
+    _assertSource(
+        "operator +() {}",
+        AstFactory.methodDeclaration2(
+            null,
+            null,
+            null,
+            Keyword.OPERATOR,
+            AstFactory.identifier3("+"),
+            AstFactory.formalParameterList(),
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_operator_returnType() {
+    _assertSource(
+        "T operator +() {}",
+        AstFactory.methodDeclaration2(
+            null,
+            AstFactory.typeName4("T"),
+            null,
+            Keyword.OPERATOR,
+            AstFactory.identifier3("+"),
+            AstFactory.formalParameterList(),
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_returnType() {
+    _assertSource(
+        "T m() {}",
+        AstFactory.methodDeclaration2(
+            null,
+            AstFactory.typeName4("T"),
+            null,
+            null,
+            AstFactory.identifier3("m"),
+            AstFactory.formalParameterList(),
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_setter() {
+    _assertSource(
+        "set m(var v) {}",
+        AstFactory.methodDeclaration2(
+            null,
+            null,
+            Keyword.SET,
+            null,
+            AstFactory.identifier3("m"),
+            AstFactory.formalParameterList(
+                [AstFactory.simpleFormalParameter(Keyword.VAR, "v")]),
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_static() {
+    _assertSource(
+        "static m() {}",
+        AstFactory.methodDeclaration2(
+            Keyword.STATIC,
+            null,
+            null,
+            null,
+            AstFactory.identifier3("m"),
+            AstFactory.formalParameterList(),
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_static_returnType() {
+    _assertSource(
+        "static T m() {}",
+        AstFactory.methodDeclaration2(
+            Keyword.STATIC,
+            AstFactory.typeName4("T"),
+            null,
+            null,
+            AstFactory.identifier3("m"),
+            AstFactory.formalParameterList(),
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_typeParameters() {
+    _assertSource(
+        "m<E>() {}",
+        AstFactory.methodDeclaration3(
+            null,
+            null,
+            null,
+            null,
+            AstFactory.identifier3("m"),
+            AstFactory.typeParameterList(['E']),
+            AstFactory.formalParameterList(),
+            AstFactory.blockFunctionBody2()));
+  }
+
+  void test_visitMethodDeclaration_withMetadata() {
+    MethodDeclaration declaration = AstFactory.methodDeclaration2(
+        null,
+        null,
+        null,
+        null,
+        AstFactory.identifier3("m"),
+        AstFactory.formalParameterList(),
+        AstFactory.blockFunctionBody2());
+    declaration.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated m() {}", declaration);
+  }
+
+  void test_visitMethodInvocation_conditional() {
+    _assertSource(
+        "t?.m()",
+        AstFactory.methodInvocation(
+            AstFactory.identifier3("t"), "m", null, TokenType.QUESTION_PERIOD));
+  }
+
+  void test_visitMethodInvocation_noTarget() {
+    _assertSource("m()", AstFactory.methodInvocation2("m"));
+  }
+
+  void test_visitMethodInvocation_target() {
+    _assertSource(
+        "t.m()", AstFactory.methodInvocation(AstFactory.identifier3("t"), "m"));
+  }
+
+  void test_visitMethodInvocation_typeArguments() {
+    _assertSource(
+        "m<A>()",
+        AstFactory.methodInvocation3(null, "m",
+            AstFactory.typeArgumentList([AstFactory.typeName4('A')])));
+  }
+
+  void test_visitNamedExpression() {
+    _assertSource(
+        "a: b", AstFactory.namedExpression2("a", AstFactory.identifier3("b")));
+  }
+
+  void test_visitNamedFormalParameter() {
+    _assertSource(
+        "var a : 0",
+        AstFactory.namedFormalParameter(
+            AstFactory.simpleFormalParameter(Keyword.VAR, "a"),
+            AstFactory.integer(0)));
+  }
+
+  void test_visitNativeClause() {
+    _assertSource("native 'code'", AstFactory.nativeClause("code"));
+  }
+
+  void test_visitNativeFunctionBody() {
+    _assertSource("native 'str';", AstFactory.nativeFunctionBody("str"));
+  }
+
+  void test_visitNullLiteral() {
+    _assertSource("null", AstFactory.nullLiteral());
+  }
+
+  void test_visitParenthesizedExpression() {
+    _assertSource(
+        "(a)", AstFactory.parenthesizedExpression(AstFactory.identifier3("a")));
+  }
+
+  void test_visitPartDirective() {
+    _assertSource("part 'a.dart';", AstFactory.partDirective2("a.dart"));
+  }
+
+  void test_visitPartDirective_withMetadata() {
+    PartDirective directive = AstFactory.partDirective2("a.dart");
+    directive.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated part 'a.dart';", directive);
+  }
+
+  void test_visitPartOfDirective() {
+    _assertSource("part of l;",
+        AstFactory.partOfDirective(AstFactory.libraryIdentifier2(["l"])));
+  }
+
+  void test_visitPartOfDirective_withMetadata() {
+    PartOfDirective directive =
+        AstFactory.partOfDirective(AstFactory.libraryIdentifier2(["l"]));
+    directive.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated part of l;", directive);
+  }
+
+  void test_visitPositionalFormalParameter() {
+    _assertSource(
+        "var a = 0",
+        AstFactory.positionalFormalParameter(
+            AstFactory.simpleFormalParameter(Keyword.VAR, "a"),
+            AstFactory.integer(0)));
+  }
+
+  void test_visitPostfixExpression() {
+    _assertSource(
+        "a++",
+        AstFactory.postfixExpression(
+            AstFactory.identifier3("a"), TokenType.PLUS_PLUS));
+  }
+
+  void test_visitPrefixedIdentifier() {
+    _assertSource("a.b", AstFactory.identifier5("a", "b"));
+  }
+
+  void test_visitPrefixExpression() {
+    _assertSource(
+        "-a",
+        AstFactory.prefixExpression(
+            TokenType.MINUS, AstFactory.identifier3("a")));
+  }
+
+  void test_visitPropertyAccess() {
+    _assertSource(
+        "a.b", AstFactory.propertyAccess2(AstFactory.identifier3("a"), "b"));
+  }
+
+  void test_visitPropertyAccess_conditional() {
+    _assertSource(
+        "a?.b",
+        AstFactory.propertyAccess2(
+            AstFactory.identifier3("a"), "b", TokenType.QUESTION_PERIOD));
+  }
+
+  void test_visitRedirectingConstructorInvocation_named() {
+    _assertSource(
+        "this.c()", AstFactory.redirectingConstructorInvocation2("c"));
+  }
+
+  void test_visitRedirectingConstructorInvocation_unnamed() {
+    _assertSource("this()", AstFactory.redirectingConstructorInvocation());
+  }
+
+  void test_visitRethrowExpression() {
+    _assertSource("rethrow", AstFactory.rethrowExpression());
+  }
+
+  void test_visitReturnStatement_expression() {
+    _assertSource(
+        "return a;", AstFactory.returnStatement2(AstFactory.identifier3("a")));
+  }
+
+  void test_visitReturnStatement_noExpression() {
+    _assertSource("return;", AstFactory.returnStatement());
+  }
+
+  void test_visitScriptTag() {
+    String scriptTag = "!#/bin/dart.exe";
+    _assertSource(scriptTag, AstFactory.scriptTag(scriptTag));
+  }
+
+  void test_visitSimpleFormalParameter_keyword() {
+    _assertSource("var a", AstFactory.simpleFormalParameter(Keyword.VAR, "a"));
+  }
+
+  void test_visitSimpleFormalParameter_keyword_type() {
+    _assertSource(
+        "final A a",
+        AstFactory.simpleFormalParameter2(
+            Keyword.FINAL, AstFactory.typeName4("A"), "a"));
+  }
+
+  void test_visitSimpleFormalParameter_type() {
+    _assertSource("A a",
+        AstFactory.simpleFormalParameter4(AstFactory.typeName4("A"), "a"));
+  }
+
+  void test_visitSimpleIdentifier() {
+    _assertSource("a", AstFactory.identifier3("a"));
+  }
+
+  void test_visitSimpleStringLiteral() {
+    _assertSource("'a'", AstFactory.string2("a"));
+  }
+
+  void test_visitStringInterpolation() {
+    _assertSource(
+        "'a\${e}b'",
+        AstFactory.string([
+          AstFactory.interpolationString("'a", "a"),
+          AstFactory.interpolationExpression(AstFactory.identifier3("e")),
+          AstFactory.interpolationString("b'", "b")
+        ]));
+  }
+
+  void test_visitSuperConstructorInvocation() {
+    _assertSource("super()", AstFactory.superConstructorInvocation());
+  }
+
+  void test_visitSuperConstructorInvocation_named() {
+    _assertSource("super.c()", AstFactory.superConstructorInvocation2("c"));
+  }
+
+  void test_visitSuperExpression() {
+    _assertSource("super", AstFactory.superExpression());
+  }
+
+  void test_visitSwitchCase_multipleLabels() {
+    _assertSource(
+        "l1: l2: case a: {}",
+        AstFactory.switchCase2(
+            [AstFactory.label2("l1"), AstFactory.label2("l2")],
+            AstFactory.identifier3("a"),
+            [AstFactory.block()]));
+  }
+
+  void test_visitSwitchCase_multipleStatements() {
+    _assertSource(
+        "case a: {} {}",
+        AstFactory.switchCase(AstFactory.identifier3("a"),
+            [AstFactory.block(), AstFactory.block()]));
+  }
+
+  void test_visitSwitchCase_noLabels() {
+    _assertSource(
+        "case a: {}",
+        AstFactory.switchCase(
+            AstFactory.identifier3("a"), [AstFactory.block()]));
+  }
+
+  void test_visitSwitchCase_singleLabel() {
+    _assertSource(
+        "l1: case a: {}",
+        AstFactory.switchCase2([AstFactory.label2("l1")],
+            AstFactory.identifier3("a"), [AstFactory.block()]));
+  }
+
+  void test_visitSwitchDefault_multipleLabels() {
+    _assertSource(
+        "l1: l2: default: {}",
+        AstFactory.switchDefault(
+            [AstFactory.label2("l1"), AstFactory.label2("l2")],
+            [AstFactory.block()]));
+  }
+
+  void test_visitSwitchDefault_multipleStatements() {
+    _assertSource("default: {} {}",
+        AstFactory.switchDefault2([AstFactory.block(), AstFactory.block()]));
+  }
+
+  void test_visitSwitchDefault_noLabels() {
+    _assertSource(
+        "default: {}", AstFactory.switchDefault2([AstFactory.block()]));
+  }
+
+  void test_visitSwitchDefault_singleLabel() {
+    _assertSource(
+        "l1: default: {}",
+        AstFactory.switchDefault(
+            [AstFactory.label2("l1")], [AstFactory.block()]));
+  }
+
+  void test_visitSwitchStatement() {
+    _assertSource(
+        "switch (a) {case 'b': {} default: {}}",
+        AstFactory.switchStatement(AstFactory.identifier3("a"), [
+          AstFactory.switchCase(AstFactory.string2("b"), [AstFactory.block()]),
+          AstFactory.switchDefault2([AstFactory.block()])
+        ]));
+  }
+
+  void test_visitSymbolLiteral_multiple() {
+    _assertSource("#a.b.c", AstFactory.symbolLiteral(["a", "b", "c"]));
+  }
+
+  void test_visitSymbolLiteral_single() {
+    _assertSource("#a", AstFactory.symbolLiteral(["a"]));
+  }
+
+  void test_visitThisExpression() {
+    _assertSource("this", AstFactory.thisExpression());
+  }
+
+  void test_visitThrowStatement() {
+    _assertSource(
+        "throw e", AstFactory.throwExpression2(AstFactory.identifier3("e")));
+  }
+
+  void test_visitTopLevelVariableDeclaration_multiple() {
+    _assertSource(
+        "var a;",
+        AstFactory.topLevelVariableDeclaration2(
+            Keyword.VAR, [AstFactory.variableDeclaration("a")]));
+  }
+
+  void test_visitTopLevelVariableDeclaration_single() {
+    _assertSource(
+        "var a, b;",
+        AstFactory.topLevelVariableDeclaration2(Keyword.VAR, [
+          AstFactory.variableDeclaration("a"),
+          AstFactory.variableDeclaration("b")
+        ]));
+  }
+
+  void test_visitTryStatement_catch() {
+    _assertSource(
+        "try {} on E {}",
+        AstFactory.tryStatement2(AstFactory.block(),
+            [AstFactory.catchClause3(AstFactory.typeName4("E"))]));
+  }
+
+  void test_visitTryStatement_catches() {
+    _assertSource(
+        "try {} on E {} on F {}",
+        AstFactory.tryStatement2(AstFactory.block(), [
+          AstFactory.catchClause3(AstFactory.typeName4("E")),
+          AstFactory.catchClause3(AstFactory.typeName4("F"))
+        ]));
+  }
+
+  void test_visitTryStatement_catchFinally() {
+    _assertSource(
+        "try {} on E {} finally {}",
+        AstFactory.tryStatement3(
+            AstFactory.block(),
+            [AstFactory.catchClause3(AstFactory.typeName4("E"))],
+            AstFactory.block()));
+  }
+
+  void test_visitTryStatement_finally() {
+    _assertSource("try {} finally {}",
+        AstFactory.tryStatement(AstFactory.block(), AstFactory.block()));
+  }
+
+  void test_visitTypeArgumentList_multiple() {
+    _assertSource(
+        "<E, F>",
+        AstFactory.typeArgumentList(
+            [AstFactory.typeName4("E"), AstFactory.typeName4("F")]));
+  }
+
+  void test_visitTypeArgumentList_single() {
+    _assertSource(
+        "<E>", AstFactory.typeArgumentList([AstFactory.typeName4("E")]));
+  }
+
+  void test_visitTypeName_multipleArgs() {
+    _assertSource(
+        "C<D, E>",
+        AstFactory.typeName4(
+            "C", [AstFactory.typeName4("D"), AstFactory.typeName4("E")]));
+  }
+
+  void test_visitTypeName_nestedArg() {
+    _assertSource(
+        "C<D<E>>",
+        AstFactory.typeName4("C", [
+          AstFactory.typeName4("D", [AstFactory.typeName4("E")])
+        ]));
+  }
+
+  void test_visitTypeName_noArgs() {
+    _assertSource("C", AstFactory.typeName4("C"));
+  }
+
+  void test_visitTypeName_singleArg() {
+    _assertSource(
+        "C<D>", AstFactory.typeName4("C", [AstFactory.typeName4("D")]));
+  }
+
+  void test_visitTypeParameter_withExtends() {
+    _assertSource("E extends C",
+        AstFactory.typeParameter2("E", AstFactory.typeName4("C")));
+  }
+
+  void test_visitTypeParameter_withMetadata() {
+    TypeParameter parameter = AstFactory.typeParameter("E");
+    parameter.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated E", parameter);
+  }
+
+  void test_visitTypeParameter_withoutExtends() {
+    _assertSource("E", AstFactory.typeParameter("E"));
+  }
+
+  void test_visitTypeParameterList_multiple() {
+    _assertSource("<E, F>", AstFactory.typeParameterList(["E", "F"]));
+  }
+
+  void test_visitTypeParameterList_single() {
+    _assertSource("<E>", AstFactory.typeParameterList(["E"]));
+  }
+
+  void test_visitVariableDeclaration_initialized() {
+    _assertSource("a = b",
+        AstFactory.variableDeclaration2("a", AstFactory.identifier3("b")));
+  }
+
+  void test_visitVariableDeclaration_uninitialized() {
+    _assertSource("a", AstFactory.variableDeclaration("a"));
+  }
+
+  void test_visitVariableDeclaration_withMetadata() {
+    VariableDeclaration declaration = AstFactory.variableDeclaration("a");
+    declaration.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated a", declaration);
+  }
+
+  void test_visitVariableDeclarationList_const_type() {
+    _assertSource(
+        "const C a, b",
+        AstFactory.variableDeclarationList(
+            Keyword.CONST, AstFactory.typeName4("C"), [
+          AstFactory.variableDeclaration("a"),
+          AstFactory.variableDeclaration("b")
+        ]));
+  }
+
+  void test_visitVariableDeclarationList_final_noType() {
+    _assertSource(
+        "final a, b",
+        AstFactory.variableDeclarationList2(Keyword.FINAL, [
+          AstFactory.variableDeclaration("a"),
+          AstFactory.variableDeclaration("b")
+        ]));
+  }
+
+  void test_visitVariableDeclarationList_final_withMetadata() {
+    VariableDeclarationList declarationList = AstFactory
+        .variableDeclarationList2(Keyword.FINAL, [
+      AstFactory.variableDeclaration("a"),
+      AstFactory.variableDeclaration("b")
+    ]);
+    declarationList.metadata
+        .add(AstFactory.annotation(AstFactory.identifier3("deprecated")));
+    _assertSource("@deprecated final a, b", declarationList);
+  }
+
+  void test_visitVariableDeclarationList_type() {
+    _assertSource(
+        "C a, b",
+        AstFactory.variableDeclarationList(null, AstFactory.typeName4("C"), [
+          AstFactory.variableDeclaration("a"),
+          AstFactory.variableDeclaration("b")
+        ]));
+  }
+
+  void test_visitVariableDeclarationList_var() {
+    _assertSource(
+        "var a, b",
+        AstFactory.variableDeclarationList2(Keyword.VAR, [
+          AstFactory.variableDeclaration("a"),
+          AstFactory.variableDeclaration("b")
+        ]));
+  }
+
+  void test_visitVariableDeclarationStatement() {
+    _assertSource(
+        "C c;",
+        AstFactory.variableDeclarationStatement(null, AstFactory.typeName4("C"),
+            [AstFactory.variableDeclaration("c")]));
+  }
+
+  void test_visitWhileStatement() {
+    _assertSource(
+        "while (c) {}",
+        AstFactory.whileStatement(
+            AstFactory.identifier3("c"), AstFactory.block()));
+  }
+
+  void test_visitWithClause_multiple() {
+    _assertSource(
+        "with A, B, C",
+        AstFactory.withClause([
+          AstFactory.typeName4("A"),
+          AstFactory.typeName4("B"),
+          AstFactory.typeName4("C")
+        ]));
+  }
+
+  void test_visitWithClause_single() {
+    _assertSource("with A", AstFactory.withClause([AstFactory.typeName4("A")]));
+  }
+
+  void test_visitYieldStatement() {
+    _assertSource(
+        "yield e;", AstFactory.yieldStatement(AstFactory.identifier3("e")));
+  }
+
+  void test_visitYieldStatement_each() {
+    _assertSource("yield* e;",
+        AstFactory.yieldEachStatement(AstFactory.identifier3("e")));
+  }
+
+  /**
+   * Assert that a `ToSourceVisitor` will produce the expected source when visiting the given
+   * node.
+   *
+   * @param expectedSource the source string that the visitor is expected to produce
+   * @param node the AST node being visited to produce the actual source
+   * @throws AFE if the visitor does not produce the expected source for the given node
+   */
+  void _assertSource(String expectedSource, AstNode node) {
+    PrintStringWriter writer = new PrintStringWriter();
+    node.accept(new ToSourceVisitor(writer));
+    expect(writer.toString(), expectedSource);
+  }
+}
+
+@reflectiveTest
+class VariableDeclarationTest extends ParserTestCase {
+  void test_getDocumentationComment_onGrandParent() {
+    VariableDeclaration varDecl = AstFactory.variableDeclaration("a");
+    TopLevelVariableDeclaration decl =
+        AstFactory.topLevelVariableDeclaration2(Keyword.VAR, [varDecl]);
+    Comment comment = Comment.createDocumentationComment(new List<Token>(0));
+    expect(varDecl.documentationComment, isNull);
+    decl.documentationComment = comment;
+    expect(varDecl.documentationComment, isNotNull);
+    expect(decl.documentationComment, isNotNull);
+  }
+
+  void test_getDocumentationComment_onNode() {
+    VariableDeclaration decl = AstFactory.variableDeclaration("a");
+    Comment comment = Comment.createDocumentationComment(new List<Token>(0));
+    decl.documentationComment = comment;
+    expect(decl.documentationComment, isNotNull);
+  }
+}
+
+class WrapperKind extends Enum<WrapperKind> {
+  static const WrapperKind PREFIXED_LEFT =
+      const WrapperKind('PREFIXED_LEFT', 0);
+
+  static const WrapperKind PREFIXED_RIGHT =
+      const WrapperKind('PREFIXED_RIGHT', 1);
+
+  static const WrapperKind PROPERTY_LEFT =
+      const WrapperKind('PROPERTY_LEFT', 2);
+
+  static const WrapperKind PROPERTY_RIGHT =
+      const WrapperKind('PROPERTY_RIGHT', 3);
+
+  static const WrapperKind NONE = const WrapperKind('NONE', 4);
+
+  static const List<WrapperKind> values = const [
+    PREFIXED_LEFT,
+    PREFIXED_RIGHT,
+    PROPERTY_LEFT,
+    PROPERTY_RIGHT,
+    NONE
+  ];
+
+  const WrapperKind(String name, int ordinal) : super(name, ordinal);
+}