Introduce code to resynthesize element models from summaries.

pkg/analyzer/test/src/summary/resynthesize_test.dart

+// Copyright (c) 2015, 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 test.src.serialization.elements_test;
+
+import 'package:analyzer/src/generated/element.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/summary/builder.dart';
+import 'package:analyzer/src/summary/format.dart';
+import 'package:analyzer/src/summary/resynthesize.dart';
+import 'package:analyzer/src/summary/summarize_elements.dart';
+import 'package:unittest/unittest.dart';
+
+import '../../generated/resolver_test.dart';
+import '../../reflective_tests.dart';
+
+main() {
+  groupSep = ' | ';
+  runReflectiveTests(ResynthTest);
+}
+
+@reflectiveTest
+class ResynthTest extends ResolverTestCase {
+  Set<Source> otherLibrarySources = new Set<Source>();
+
+  void addLibrary(String uri) {
+    otherLibrarySources.add(analysisContext2.sourceFactory.forUri(uri));
+  }
+
+  void addLibrarySource(String filePath, String contents) {
+    otherLibrarySources.add(addNamedSource(filePath, contents));
+  }
+
+  void checkLibrary(String text, {bool allowErrors: false}) {
+    Source source = addSource(text);
+    LibraryElementImpl original = resolve2(source);
+    LibraryElementImpl resynthesized =
+        resynthesizeLibrary(source, original, allowErrors);
+    checkLibraryElements(original, resynthesized);
+  }
+
+  void checkLibraryElements(
+      LibraryElementImpl original, LibraryElementImpl resynthesized) {
+    compareElements(resynthesized, original, '(library)');
+    expect(resynthesized.displayName, original.displayName);
+    expect(original.enclosingElement, isNull);
+    expect(resynthesized.enclosingElement, isNull);
+    compareCompilationUnitElements(resynthesized.definingCompilationUnit,
+        original.definingCompilationUnit);
+    expect(resynthesized.parts.length, original.parts.length);
+    for (int i = 0; i < resynthesized.parts.length; i++) {
+      compareCompilationUnitElements(resynthesized.parts[i], original.parts[i]);
+    }
+    expect(resynthesized.imports.length, original.imports.length);
+    for (int i = 0; i < resynthesized.imports.length; i++) {
+      compareImportElements(resynthesized.imports[i], original.imports[i],
+          'import ${original.imports[i].name}');
+    }
+    expect(resynthesized.exports.length, original.exports.length);
+    for (int i = 0; i < resynthesized.exports.length; i++) {
+      compareExportElements(resynthesized.exports[i], original.exports[i],
+          'export ${original.exports[i].name}');
+    }
+    // TODO(paulberry): test entryPoint, exportNamespace, publicNamespace,
+    // and metadata.
+  }
+
+  void compareClassElements(
+      ClassElementImpl resynthesized, ClassElementImpl original, String desc) {
+    compareElements(resynthesized, original, desc);
+    expect(resynthesized.fields.length, original.fields.length);
+    for (int i = 0; i < resynthesized.fields.length; i++) {
+      String name = original.fields[i].name;
+      compareFieldElements(
+          resynthesized.getField(name), original.fields[i], '$desc.$name');
+    }
+    compareTypes(
+        resynthesized.supertype, original.supertype, '$desc supertype');
+    expect(resynthesized.interfaces.length, original.interfaces.length);
+    for (int i = 0; i < resynthesized.interfaces.length; i++) {
+      compareTypes(resynthesized.interfaces[i], original.interfaces[i],
+          '$desc interface ${original.interfaces[i].name}');
+    }
+    expect(resynthesized.mixins.length, original.mixins.length);
+    for (int i = 0; i < resynthesized.mixins.length; i++) {
+      compareTypes(resynthesized.mixins[i], original.mixins[i],
+          '$desc mixin ${original.mixins[i].name}');
+    }
+    expect(resynthesized.typeParameters.length, original.typeParameters.length);
+    for (int i = 0; i < resynthesized.typeParameters.length; i++) {
+      compareTypeParameterElements(
+          resynthesized.typeParameters[i],
+          original.typeParameters[i],
+          '$desc type parameter ${original.typeParameters[i].name}');
+    }
+    expect(resynthesized.constructors.length, original.constructors.length,
+        reason: '$desc constructors.length');
+    for (int i = 0; i < resynthesized.constructors.length; i++) {
+      compareConstructorElements(
+          resynthesized.constructors[i],
+          original.constructors[i],
+          '$desc constructor ${original.constructors[i].name}');
+    }
+    expect(resynthesized.accessors.length, original.accessors.length);
+    for (int i = 0; i < resynthesized.accessors.length; i++) {
+      String name = original.accessors[i].name;
+      if (name.endsWith('=')) {
+        comparePropertyAccessorElements(resynthesized.getSetter(name),
+            original.accessors[i], '$desc.${original.accessors[i].name}=');
+      } else {
+        comparePropertyAccessorElements(resynthesized.getGetter(name),
+            original.accessors[i], '$desc.${original.accessors[i].name}');
+      }
+    }
+    expect(resynthesized.methods.length, original.methods.length);
+    for (int i = 0; i < resynthesized.methods.length; i++) {
+      compareMethodElements(resynthesized.methods[i], original.methods[i],
+          '$desc.${original.methods[i].name}');
+    }
+    compareTypes(resynthesized.type, original.type, desc);
+  }
+
+  void compareCompilationUnitElements(CompilationUnitElementImpl resynthesized,
+      CompilationUnitElementImpl original) {
+    compareUriReferencedElements(resynthesized, original, '(compilation unit)');
+    expect(resynthesized.source, original.source);
+    expect(resynthesized.librarySource, original.librarySource);
+    expect(resynthesized.types.length, original.types.length);
+    for (int i = 0; i < resynthesized.types.length; i++) {
+      compareClassElements(
+          resynthesized.types[i], original.types[i], original.types[i].name);
+    }
+    expect(resynthesized.topLevelVariables.length,
+        original.topLevelVariables.length);
+    for (int i = 0; i < resynthesized.topLevelVariables.length; i++) {
+      compareTopLevelVariableElements(resynthesized.topLevelVariables[i],
+          original.topLevelVariables[i], original.topLevelVariables[i].name);
+    }
+    expect(resynthesized.functions.length, original.functions.length);
+    for (int i = 0; i < resynthesized.functions.length; i++) {
+      compareFunctionElements(resynthesized.functions[i], original.functions[i],
+          original.functions[i].name);
+    }
+    expect(resynthesized.functionTypeAliases.length,
+        original.functionTypeAliases.length);
+    for (int i = 0; i < resynthesized.functionTypeAliases.length; i++) {
+      compareFunctionTypeAliasElements(
+          resynthesized.functionTypeAliases[i],
+          original.functionTypeAliases[i],
+          original.functionTypeAliases[i].name);
+    }
+    expect(resynthesized.enums.length, original.enums.length);
+    for (int i = 0; i < resynthesized.enums.length; i++) {
+      compareClassElements(
+          resynthesized.enums[i], original.enums[i], original.enums[i].name);
+    }
+    expect(resynthesized.accessors.length, original.accessors.length);
+    for (int i = 0; i < resynthesized.accessors.length; i++) {
+      comparePropertyAccessorElements(resynthesized.accessors[i],
+          original.accessors[i], original.accessors[i].name);
+    }
+    // TODO(paulberry): test metadata and offsetToElementMap.
+  }
+
+  void compareConstructorElements(ConstructorElementImpl resynthesized,
+      ConstructorElementImpl original, String desc) {
+    compareExecutableElements(resynthesized, original, desc);
+    // TODO(paulberry): test redirectedConstructor and constantInitializers
+  }
+
+  void compareElements(
+      ElementImpl resynthesized, ElementImpl original, String desc) {
+    expect(resynthesized, isNotNull);
+    expect(resynthesized.kind, original.kind);
+    expect(resynthesized.location, original.location);
+    expect(resynthesized.name, original.name);
+    for (Modifier modifier in Modifier.values) {
+      if (modifier == Modifier.MIXIN) {
+        // Skipping for now.  TODO(paulberry): fix.
+        continue;
+      }
+      bool got = resynthesized.hasModifier(modifier);
+      bool want = original.hasModifier(modifier);
+      expect(got, want,
+          reason: 'Mismatch in $desc.$modifier: got $got, want $want');
+    }
+  }
+
+  void compareExecutableElements(ExecutableElementImpl resynthesized,
+      ExecutableElementImpl original, String desc) {
+    compareElements(resynthesized, original, desc);
+    expect(resynthesized.parameters.length, original.parameters.length);
+    for (int i = 0; i < resynthesized.parameters.length; i++) {
+      compareParameterElements(
+          resynthesized.parameters[i],
+          original.parameters[i],
+          '$desc parameter ${original.parameters[i].name}');
+    }
+    compareTypes(
+        resynthesized.returnType, original.returnType, '$desc return type');
+    compareTypes(resynthesized.type, original.type, desc);
+  }
+
+  void compareExportElements(ExportElementImpl resynthesized,
+      ExportElementImpl original, String desc) {
+    compareUriReferencedElements(resynthesized, original, desc);
+    expect(resynthesized.exportedLibrary.location,
+        original.exportedLibrary.location);
+    expect(resynthesized.combinators.length, original.combinators.length);
+    for (int i = 0; i < resynthesized.combinators.length; i++) {
+      compareNamespaceCombinators(
+          resynthesized.combinators[i], original.combinators[i]);
+    }
+  }
+
+  void compareFieldElements(
+      FieldElementImpl resynthesized, FieldElementImpl original, String desc) {
+    comparePropertyInducingElements(resynthesized, original, desc);
+    // TODO(paulberry): test evaluationResult
+  }
+
+  void compareFunctionElements(FunctionElementImpl resynthesized,
+      FunctionElementImpl original, String desc) {
+    compareExecutableElements(resynthesized, original, desc);
+  }
+
+  void compareFunctionTypeAliasElements(
+      FunctionTypeAliasElementImpl resynthesized,
+      FunctionTypeAliasElementImpl original,
+      String desc) {
+    compareElements(resynthesized, original, desc);
+    expect(resynthesized.parameters.length, original.parameters.length);
+    for (int i = 0; i < resynthesized.parameters.length; i++) {
+      compareParameterElements(
+          resynthesized.parameters[i],
+          original.parameters[i],
+          '$desc parameter ${original.parameters[i].name}');
+    }
+    compareTypes(
+        resynthesized.returnType, original.returnType, '$desc return type');
+    compareTypes(resynthesized.type, original.type, desc);
+    expect(resynthesized.typeParameters.length, original.typeParameters.length);
+    for (int i = 0; i < resynthesized.typeParameters.length; i++) {
+      compareTypeParameterElements(
+          resynthesized.typeParameters[i],
+          original.typeParameters[i],
+          '$desc type parameter ${original.typeParameters[i].name}');
+    }
+  }
+
+  void compareImportElements(ImportElementImpl resynthesized,
+      ImportElementImpl original, String desc) {
+    compareUriReferencedElements(resynthesized, original, desc);
+    expect(resynthesized.importedLibrary.location,
+        original.importedLibrary.location);
+    if (original.prefix == null) {
+      expect(resynthesized.prefix, isNull);
+    } else {
+      comparePrefixElements(
+          resynthesized.prefix, original.prefix, original.prefix.name);
+    }
+    expect(resynthesized.combinators.length, original.combinators.length);
+    for (int i = 0; i < resynthesized.combinators.length; i++) {
+      compareNamespaceCombinators(
+          resynthesized.combinators[i], original.combinators[i]);
+    }
+  }
+
+  void compareMethodElements(MethodElementImpl resynthesized,
+      MethodElementImpl original, String desc) {
+    // TODO(paulberry): do we need to deal with
+    // MultiplyInheritedMethodElementImpl?
+    // TODO(paulberry): compare type parameters for generic methods.
+    compareExecutableElements(resynthesized, original, desc);
+  }
+
+  void compareNamespaceCombinators(
+      NamespaceCombinator resynthesized, NamespaceCombinator original) {
+    if (original is ShowElementCombinatorImpl &&
+        resynthesized is ShowElementCombinatorImpl) {
+      expect(resynthesized.shownNames, original.shownNames);
+    } else if (original is HideElementCombinatorImpl &&
+        resynthesized is HideElementCombinatorImpl) {
+      expect(resynthesized.hiddenNames, original.hiddenNames);
+    } else if (resynthesized.runtimeType != original.runtimeType) {
+      fail(
+          'Type mismatch: expected ${original.runtimeType}, got ${resynthesized.runtimeType}');
+    } else {
+      fail('Unimplemented comparison for ${original.runtimeType}');
+    }
+  }
+
+  void compareParameterElements(ParameterElementImpl resynthesized,
+      ParameterElementImpl original, String desc) {
+    compareVariableElements(resynthesized, original, desc);
+    expect(resynthesized.parameters.length, original.parameters.length);
+    for (int i = 0; i < resynthesized.parameters.length; i++) {
+      compareParameterElements(
+          resynthesized.parameters[i],
+          original.parameters[i],
+          '$desc parameter ${original.parameters[i].name}');
+    }
+    expect(resynthesized.parameterKind, original.parameterKind);
+  }
+
+  void comparePrefixElements(PrefixElementImpl resynthesized,
+      PrefixElementImpl original, String desc) {
+    compareElements(resynthesized, original, desc);
+    // TODO(paulberry): test _importedLibraries.
+  }
+
+  void comparePropertyAccessorElements(
+      PropertyAccessorElementImpl resynthesized,
+      PropertyAccessorElementImpl original,
+      String desc) {
+    // TODO(paulberry): do I need to worry about
+    // MultiplyInheritedPropertyAccessorElementImpl?
+    compareExecutableElements(resynthesized, original, desc);
+    expect(resynthesized.variable, isNotNull);
+    expect(resynthesized.variable.location, original.variable.location);
+  }
+
+  void comparePropertyInducingElements(
+      PropertyInducingElementImpl resynthesized,
+      PropertyInducingElementImpl original,
+      String desc) {
+    compareVariableElements(resynthesized, original, desc);
+    if (original.getter == null) {
+      expect(resynthesized.getter, isNull);
+    } else {
+      expect(resynthesized.getter, isNotNull);
+      expect(resynthesized.getter.location, original.getter.location);
+    }
+    if (original.setter == null) {
+      expect(resynthesized.setter, isNull);
+    } else {
+      expect(resynthesized.setter, isNotNull);
+      expect(resynthesized.setter.location, original.setter.location);
+    }
+  }
+
+  void compareTopLevelVariableElements(
+      TopLevelVariableElementImpl resynthesized,
+      TopLevelVariableElementImpl original,
+      String desc) {
+    comparePropertyInducingElements(resynthesized, original, desc);
+    // TODO(paulberry): test evaluationResult
+  }
+
+  void compareTypeImpls(TypeImpl resynthesized, TypeImpl original) {
+    expect(resynthesized.element.location, original.element.location);
+    expect(resynthesized.name, original.name);
+  }
+
+  void compareTypeParameterElements(TypeParameterElementImpl resynthesized,
+      TypeParameterElementImpl original, String desc) {
+    compareElements(resynthesized, original, desc);
+    compareTypes(resynthesized.type, original.type, desc);
+    compareTypes(resynthesized.bound, original.bound, '$desc bound');
+  }
+
+  void compareTypes(DartType resynthesized, DartType original, String desc) {
+    if (original == null) {
+      expect(resynthesized, isNull);
+    } else if (resynthesized is InterfaceTypeImpl &&
+        original is InterfaceTypeImpl) {
+      compareTypeImpls(resynthesized, original);
+      expect(resynthesized.typeArguments.length, original.typeArguments.length);
+      for (int i = 0; i < resynthesized.typeArguments.length; i++) {
+        compareTypes(resynthesized.typeArguments[i], original.typeArguments[i],
+            '$desc type argument ${original.typeArguments[i].name}');
+      }
+    } else if (resynthesized is TypeParameterTypeImpl &&
+        original is TypeParameterTypeImpl) {
+      compareTypeImpls(resynthesized, original);
+    } else if (resynthesized is DynamicTypeImpl &&
+        original is DynamicTypeImpl) {
+      expect(resynthesized, same(original));
+    } else if (resynthesized is UndefinedTypeImpl &&
+        original is UndefinedTypeImpl) {
+      expect(resynthesized, same(original));
+    } else if (resynthesized is FunctionTypeImpl &&
+        original is FunctionTypeImpl) {
+      compareTypeImpls(resynthesized, original);
+      if (original.element.isSynthetic &&
+          original.element is FunctionTypeAliasElementImpl &&
+          resynthesized.element is FunctionTypeAliasElementImpl) {
+        compareFunctionTypeAliasElements(
+            resynthesized.element, original.element, desc);
+      }
+      for (int i = 0; i < resynthesized.typeArguments.length; i++) {
+        compareTypes(resynthesized.typeArguments[i], original.typeArguments[i],
+            '$desc type argument ${original.typeArguments[i].name}');
+      }
+    } else if (resynthesized is VoidTypeImpl && original is VoidTypeImpl) {
+      expect(resynthesized, same(original));
+    } else if (resynthesized.runtimeType != original.runtimeType) {
+      fail(
+          'Type mismatch: expected ${original.runtimeType}, got ${resynthesized.runtimeType}');
+    } else {
+      fail('Unimplemented comparison for ${original.runtimeType}');
+    }
+  }
+
+  void compareUriReferencedElements(UriReferencedElementImpl resynthesized,
+      UriReferencedElementImpl original, String desc) {
+    compareElements(resynthesized, original, desc);
+    expect(resynthesized.uri, original.uri);
+  }
+
+  void compareVariableElements(VariableElementImpl resynthesized,
+      VariableElementImpl original, String desc) {
+    compareElements(resynthesized, original, desc);
+    compareTypes(resynthesized.type, original.type, desc);
+    // TODO(paulberry): test initializer
+  }
+
+  fail_core() {
+    // TODO(paulberry): figure out why this test is failing.  It's possible
+    // some of the elements in the core library fail to resynthesize properly
+    // because of flaws in the mock SDK; it's also possible that there are bugs
+    // in the summary logic which are not caught by other tests.
+    String uri = 'dart:core';
+    LibraryElementImpl original =
+        resolve2(analysisContext2.sourceFactory.forUri(uri));
+    LibraryElementImpl resynthesized =
+        resynthesizeLibraryElement(uri, original);
+    checkLibraryElements(original, resynthesized);
+  }
+
+  PrelinkedLibrary getSummaryFor(LibraryElement lib) {
+    BuilderContext ctx = new BuilderContext();
+    List<int> summary = serializeLibrary(ctx, lib, typeProvider).toBuffer();
+    return new PrelinkedLibrary.fromBuffer(summary);
+  }
+
+  LibraryElementImpl resynthesizeLibrary(
+      Source source, LibraryElementImpl original, bool allowErrors) {
+    if (!allowErrors) {
+      assertNoErrors(source);
+    }
+    String uri = source.uri.toString();
+    addLibrary('dart:core');
+    return resynthesizeLibraryElement(uri, original);
+  }
+
+  LibraryElementImpl resynthesizeLibraryElement(
+      String uri, LibraryElementImpl original) {
+    Map<String, PrelinkedLibrary> summaries = <String, PrelinkedLibrary>{
+      uri: getSummaryFor(original)
+    };
+    for (Source source in otherLibrarySources) {
+      LibraryElement original = resolve2(source);
+      String uri = source.uri.toString();
+      summaries[uri] = getSummaryFor(original);
+    }
+    PrelinkedLibrary getSummary(String uri) {
+      PrelinkedLibrary serializedLibrary = summaries[uri];
+      if (serializedLibrary == null) {
+        fail('Unexpectedly tried to get serialized library for $uri');
+      }
+      return serializedLibrary;
+    }
+    SummaryResynthesizer resynthesizer = new SummaryResynthesizer(
+        analysisContext, getSummary, analysisContext.sourceFactory);
+    LibraryElementImpl resynthesized = resynthesizer.getLibraryElement(uri);
+    // Check that no other summaries needed to be resynthesized to resynthesize
+    // the library element.
+    expect(resynthesizer.resynthesisCount, 1);
+    return resynthesized;
+  }
+
+  test_class_alias() {
+    checkLibrary('class C = D with E, F; class D {} class E {} class F {}');
+  }
+
+  test_class_alias_with_forwarding_constructors() {
+    addLibrarySource(
+        '/a.dart',
+        '''
+class Base {
+  Base._priv();
+  Base();
+  Base.noArgs();
+  Base.requiredArg(x);
+  Base.positionalArg([x]);
+  Base.namedArg({x});
+  factory Base.fact() => null;
+  factory Base.fact2() = Base.noArgs;
+}
+''');
+    checkLibrary('''
+import "a.dart";
+class M {}
+class MixinApp = Base with M;
+''');
+  }
+
+  test_class_alias_with_forwarding_constructors_type_substitution() {
+    checkLibrary('''
+class Base<T> {
+  Base.ctor(T t, List<T> l);
+}
+class M {}
+class MixinApp = Base with M;
+''');
+  }
+
+  test_class_alias_with_forwarding_constructors_type_substitution_complex() {
+    checkLibrary('''
+class Base<T> {
+  Base.ctor(T t, List<T> l);
+}
+class M {}
+class MixinApp<U> = Base<List<U>> with M;
+''');
+  }
+
+  test_class_alias_with_mixin_members() {
+    checkLibrary('''
+class C = D with E;
+class D {}
+class E {
+  int get a => null;
+  void set b(int i) {}
+  void f() {}
+  int x;
+}''');
+  }
+
+  test_class_constructor_const() {
+    checkLibrary('class C { const C(); }');
+  }
+
+  test_class_constructor_explicit_named() {
+    checkLibrary('class C { C.foo(); }');
+  }
+
+  test_class_constructor_explicit_type_params() {
+    checkLibrary('class C<T, U> { C(); }');
+  }
+
+  test_class_constructor_explicit_unnamed() {
+    checkLibrary('class C { C(); }');
+  }
+
+  test_class_constructor_factory() {
+    checkLibrary('class C { factory C() => null; }');
+  }
+
+  test_class_constructor_implicit() {
+    checkLibrary('class C {}');
+  }
+
+  test_class_constructor_implicit_type_params() {
+    checkLibrary('class C<T, U> {}');
+  }
+
+  test_class_constructor_params() {
+    checkLibrary('class C { C(x, y); }');
+  }
+
+  test_class_constructors() {
+    checkLibrary('class C { C.foo(); C.bar(); }');
+  }
+
+  test_class_field_const() {
+    checkLibrary('class C { static const int i = 0; }');
+  }
+
+  test_class_field_static() {
+    checkLibrary('class C { static int i; }');
+  }
+
+  test_class_fields() {
+    checkLibrary('class C { int i; int j; }');
+  }
+
+  test_class_getter_static() {
+    checkLibrary('class C { static int get x => null; }');
+  }
+
+  test_class_getters() {
+    checkLibrary('class C { int get x => null; get y => null; }');
+  }
+
+  test_class_interfaces() {
+    checkLibrary('class C implements D, E {} class D {} class E {}');
+  }
+
+  test_class_method_params() {
+    checkLibrary('class C { f(x, y) {} }');
+  }
+
+  test_class_method_static() {
+    checkLibrary('class C { static f() {} }');
+  }
+
+  test_class_methods() {
+    checkLibrary('class C { f() {} g() {} }');
+  }
+
+  test_class_mixins() {
+    checkLibrary('class C extends Object with D, E {} class D {} class E {}');
+  }
+
+  test_class_setter_static() {
+    checkLibrary('class C { static void set x(int value) {} }');
+  }
+
+  test_class_setters() {
+    checkLibrary('class C { void set x(int value) {} set y(value) {} }');
+  }
+
+  test_class_supertype() {
+    checkLibrary('class C extends D {} class D {}');
+  }
+
+  test_class_type_parameters() {
+    checkLibrary('class C<T, U> {}');
+  }
+
+  test_class_type_parameters_bound() {
+    checkLibrary('class C<T extends Object, U extends D> {} class D {}');
+  }
+
+  test_class_type_parameters_f_bound_complex() {
+    checkLibrary('class C<T extends List<U>, U> {}');
+  }
+
+  test_class_type_parameters_f_bound_simple() {
+    checkLibrary('class C<T extends U, U> {}');
+  }
+
+  test_classes() {
+    checkLibrary('class C {} class D {}');
+  }
+
+  test_enum_values() {
+    checkLibrary('enum E { v1, v2 }');
+  }
+
+  test_enums() {
+    checkLibrary('enum E1 { v1 } enum E2 { v2 }');
+  }
+
+  test_export_hide() {
+    addLibrary('dart:async');
+    checkLibrary('export "dart:async" hide Stream, Future;');
+  }
+
+  test_export_multiple_combinators() {
+    addLibrary('dart:async');
+    checkLibrary('export "dart:async" hide Stream show Future;');
+  }
+
+  test_export_show() {
+    addLibrary('dart:async');
+    checkLibrary('export "dart:async" show Future, Stream;');
+  }
+
+  test_exports() {
+    addLibrarySource('/a.dart', 'library a;');
+    addLibrarySource('/b.dart', 'library b;');
+    checkLibrary('export "a.dart"; export "b.dart";');
+  }
+
+  test_function_parameter_kind_named() {
+    // TODO(paulberry): also test default value.
+    checkLibrary('f({x}) {}');
+  }
+
+  test_function_parameter_kind_positional() {
+    // TODO(paulberry): also test default value.
+    checkLibrary('f([x]) {}');
+  }
+
+  test_function_parameter_kind_required() {
+    checkLibrary('f(x) {}');
+  }
+
+  test_function_parameter_parameters() {
+    checkLibrary('f(g(x, y)) {}');
+  }
+
+  test_function_parameter_return_type() {
+    checkLibrary('f(int g()) {}');
+  }
+
+  test_function_parameter_return_type_void() {
+    checkLibrary('f(void g()) {}');
+  }
+
+  test_function_parameter_type() {
+    checkLibrary('f(int i) {}');
+  }
+
+  test_function_parameters() {
+    checkLibrary('f(x, y) {}');
+  }
+
+  test_function_return_type() {
+    checkLibrary('int f() => null;');
+  }
+
+  test_function_return_type_implicit() {
+    checkLibrary('f() => null;');
+  }
+
+  test_function_return_type_void() {
+    checkLibrary('void f() {}');
+  }
+
+  test_functions() {
+    checkLibrary('f() {} g() {}');
+  }
+
+  test_getters() {
+    checkLibrary('int get x => null; get y => null;');
+  }
+
+  test_import_hide() {
+    addLibrary('dart:async');
+    checkLibrary('import "dart:async" hide Stream, Completer; Future f;');
+  }
+
+  test_import_multiple_combinators() {
+    addLibrary('dart:async');
+    checkLibrary('import "dart:async" hide Stream show Future; Future f;');
+  }
+
+  test_import_prefixed() {
+    addLibrarySource('/a.dart', 'library a; class C {}');
+    checkLibrary('import "a.dart" as a; a.C c;');
+  }
+
+  test_import_show() {
+    addLibrary('dart:async');
+    checkLibrary('import "dart:async" show Future, Stream; Future f;');
+  }
+
+  test_imports() {
+    addLibrarySource('/a.dart', 'library a; class C {}');
+    addLibrarySource('/b.dart', 'library b; class D {}');
+    checkLibrary('import "a.dart"; import "b.dart"; C c; D d;');
+  }
+
+  test_library() {
+    checkLibrary('');
+  }
+
+  test_library_named() {
+    checkLibrary('library foo.bar;');
+  }
+
+  test_method_parameter_parameters() {
+    checkLibrary('class C { f(g(x, y)) {} }');
+  }
+
+  test_method_parameter_return_type() {
+    checkLibrary('class C { f(int g()) {} }');
+  }
+
+  test_method_parameter_return_type_void() {
+    checkLibrary('class C { f(void g()) {} }');
+  }
+
+  test_parts() {
+    addNamedSource('/a.dart', 'part of my.lib;');
+    addNamedSource('/b.dart', 'part of my.lib;');
+    checkLibrary('library my.lib; part "a.dart"; part "b.dart";');
+  }
+
+  test_setters() {
+    checkLibrary('void set x(int value) {} set y(value) {}');
+  }
+
+  test_type_arguments_explicit() {
+    checkLibrary('Map<String, int> m;');
+  }
+
+  test_type_arguments_implicit() {
+    checkLibrary('Map m;');
+  }
+
+  test_type_dynamic() {
+    checkLibrary('dynamic d;');
+  }
+
+  test_type_reference_lib_to_lib() {
+    checkLibrary('class C {} enum E { v } typedef F(); C c; E e; F f;');
+  }
+
+  test_type_reference_lib_to_part() {
+    addNamedSource(
+        '/a.dart', 'part of l; class C {} enum E { v } typedef F();');
+    checkLibrary('library l; part "a.dart"; C c; E e; F f;');
+  }
+
+  test_type_reference_part_to_lib() {
+    addNamedSource('/a.dart', 'part of l; C c; E e; F f;');
+    checkLibrary(
+        'library l; part "a.dart"; class C {} enum E { v } typedef F();');
+  }
+
+  test_type_reference_part_to_other_part() {
+    addNamedSource(
+        '/a.dart', 'part of l; class C {} enum E { v } typedef F();');
+    addNamedSource('/b.dart', 'part of l; C c; E e; F f;');
+    checkLibrary('library l; part "a.dart"; part "b.dart";');
+  }
+
+  test_type_reference_part_to_part() {
+    addNamedSource('/a.dart',
+        'part of l; class C {} enum E { v } typedef F(); C c; E e; F f;');
+    checkLibrary('library l; part "a.dart";');
+  }
+
+  test_type_reference_to_class() {
+    checkLibrary('class C {} C c;');
+  }
+
+  test_type_reference_to_class_with_type_arguments() {
+    checkLibrary('class C<T, U> {} C<int, String> c;');
+  }
+
+  test_type_reference_to_class_with_type_arguments_implicit() {
+    checkLibrary('class C<T, U> {} C c;');
+  }
+
+  test_type_reference_to_enum() {
+    checkLibrary('enum E { v } E e;');
+  }
+
+  test_type_reference_to_import() {
+    addLibrarySource('/a.dart', 'class C {} enum E { v }; typedef F();');
+    checkLibrary('import "a.dart"; C c; E e; F f;');
+  }
+
+  test_type_reference_to_import_export() {
+    addLibrarySource('/a.dart', 'export "b.dart";');
+    addLibrarySource('/b.dart', 'class C {} enum E { v } typedef F();');
+    checkLibrary('import "a.dart"; C c; E e; F f;');
+  }
+
+  test_type_reference_to_import_export_export() {
+    addLibrarySource('/a.dart', 'export "b.dart";');
+    addLibrarySource('/b.dart', 'export "c.dart";');
+    addLibrarySource('/c.dart', 'class C {} enum E { v } typedef F();');
+    checkLibrary('import "a.dart"; C c; E e; F f;');
+  }
+
+  test_type_reference_to_import_export_export_in_subdirs() {
+    addLibrarySource('/a/a.dart', 'export "b/b.dart";');
+    addLibrarySource('/a/b/b.dart', 'export "../c/c.dart";');
+    addLibrarySource('/a/c/c.dart', 'class C {} enum E { v } typedef F();');
+    checkLibrary('import "a/a.dart"; C c; E e; F f;');
+  }
+
+  test_type_reference_to_import_export_in_subdirs() {
+    addLibrarySource('/a/a.dart', 'export "b/b.dart";');
+    addLibrarySource('/a/b/b.dart', 'class C {} enum E { v } typedef F();');
+    checkLibrary('import "a/a.dart"; C c; E e; F f;');
+  }
+
+  test_type_reference_to_import_part() {
+    addLibrarySource('/a.dart', 'library l; part "b.dart";');
+    addNamedSource(
+        '/b.dart', 'part of l; class C {} enum E { v } typedef F();');
+    checkLibrary('import "a.dart"; C c; E e; F f;');
+  }
+
+  test_type_reference_to_import_part_in_subdir() {
+    addLibrarySource('/a/b.dart', 'library l; part "c.dart";');
+    addNamedSource(
+        '/a/c.dart', 'part of l; class C {} enum E { v } typedef F();');
+    checkLibrary('import "a/b.dart"; C c; E e; F f;');
+  }
+
+  test_type_reference_to_import_relative() {
+    addLibrarySource('/a.dart', 'class C {} enum E { v } typedef F();');
+    checkLibrary('import "a.dart"; C c; E e; F f;');
+  }
+
+  test_type_reference_to_typedef() {
+    checkLibrary('typedef F(); F f;');
+  }
+
+  test_type_reference_to_typedef_with_type_arguments() {
+    checkLibrary('typedef U F<T, U>(T t); F<int, String> f;');
+  }
+
+  test_type_reference_to_typedef_with_type_arguments_implicit() {
+    checkLibrary('typedef U F<T, U>(T t); F f;');
+  }
+
+  test_type_unresolved() {
+    checkLibrary('C c;', allowErrors: true);
+  }
+
+  test_type_unresolved_prefixed() {
+    checkLibrary('import "dart:core" as core; core.C c;', allowErrors: true);
+  }
+
+  test_typedef_parameter_parameters() {
+    checkLibrary('typedef F(g(x, y));');
+  }
+
+  test_typedef_parameter_return_type() {
+    checkLibrary('typedef F(int g());');
+  }
+
+  test_typedef_parameter_type() {
+    checkLibrary('typedef F(int i);');
+  }
+
+  test_typedef_parameter_type_generic() {
+    checkLibrary('typedef F<T>(T t);');
+  }
+
+  test_typedef_parameters() {
+    checkLibrary('typedef F(x, y);');
+  }
+
+  test_typedef_return_type() {
+    checkLibrary('typedef int F();');
+  }
+
+  test_typedef_return_type_generic() {
+    checkLibrary('typedef T F<T>();');
+  }
+
+  test_typedef_return_type_implicit() {
+    checkLibrary('typedef F();');
+  }
+
+  test_typedef_return_type_void() {
+    checkLibrary('typedef void F();');
+  }
+
+  test_typedef_type_parameters() {
+    checkLibrary('typedef U F<T, U>(T t);');
+  }
+
+  test_typedef_type_parameters_bound() {
+    checkLibrary('typedef U F<T extends Object, U extends D>(T t); class D {}');
+  }
+
+  test_typedef_type_parameters_f_bound_complex() {
+    checkLibrary('typedef U F<T extends List<U>, U>(T t);');
+  }
+
+  test_typedef_type_parameters_f_bound_simple() {
+    checkLibrary('typedef U F<T extends U, U>(T t);');
+  }
+
+  test_typedefs() {
+    checkLibrary('f() {} g() {}');
+  }
+
+  test_variable_const() {
+    checkLibrary('const int i = 0;');
+  }
+
+  test_variables() {
+    checkLibrary('int i; int j;');
+  }
+}