Add support for parsing annotations with Fasta.

pkg/analyzer/test/generated/parser_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 analyzer.test.generated.parser_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_ast_factory.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
@@ skipping 13394 matching lines @@
     expect(declaration.typeParameters.typeParameters, hasLength(1));
     _assertIsDeclarationName(declaration.typeParameters.typeParameters[0].name);
   }
 
   void test_parseClassDeclaration_withDocumentationComment() {
     createParser('/// Doc\nclass C {}');
     var classDeclaration = parseFullCompilationUnitMember() as ClassDeclaration;
     expectCommentText(classDeclaration.documentationComment, '/// Doc');
   }
 
+  void test_parseClassDeclaration_metadata() {
+    createParser('@A @B(2) @C.foo(3) @d.E.bar(4, 5) class X {}');
+    var declaration = parseFullCompilationUnitMember() as ClassDeclaration;
+    expect(declaration.metadata, hasLength(4));
+
+    {
+      var annotation = declaration.metadata[0];
+      expect(annotation.atSign, isNotNull);
+      expect(annotation.name, new isInstanceOf<SimpleIdentifier>());
+      expect(annotation.name.name, 'A');
+      expect(annotation.period, isNull);
+      expect(annotation.constructorName, isNull);
+      expect(annotation.arguments, isNull);
+    }
+
+    {
+      var annotation = declaration.metadata[1];
+      expect(annotation.atSign, isNotNull);
+      expect(annotation.name, new isInstanceOf<SimpleIdentifier>());
+      expect(annotation.name.name, 'B');
+      expect(annotation.period, isNull);
+      expect(annotation.constructorName, isNull);
+      expect(annotation.arguments, isNotNull);
+      expect(annotation.arguments.arguments, hasLength(1));
+    }
+
+    {
+      var annotation = declaration.metadata[2];
+      expect(annotation.atSign, isNotNull);
+      expect(annotation.name, new isInstanceOf<PrefixedIdentifier>());
+      expect(annotation.name.name, 'C.foo');
+      expect(annotation.period, isNull);
+      expect(annotation.constructorName, isNull);
+      expect(annotation.arguments, isNotNull);
+      expect(annotation.arguments.arguments, hasLength(1));
+    }
+
+    {
+      var annotation = declaration.metadata[3];
+      expect(annotation.atSign, isNotNull);
+      expect(annotation.name, new isInstanceOf<PrefixedIdentifier>());
+      expect(annotation.name.name, 'd.E');
+      expect(annotation.period, isNotNull);
+      expect(annotation.constructorName, isNotNull);
+      expect(annotation.constructorName.name, 'bar');
+      expect(annotation.arguments, isNotNull);
+      expect(annotation.arguments.arguments, hasLength(2));
+    }
+  }
+
   void test_parseClassTypeAlias_withDocumentationComment() {
     createParser('/// Doc\nclass C = D with E;');
     var classTypeAlias = parseFullCompilationUnitMember() as ClassTypeAlias;
     expectCommentText(classTypeAlias.documentationComment, '/// Doc');
   }
 
   void test_parseCompilationUnit_abstractAsPrefix_parameterized() {
     createParser('abstract<dynamic> _abstract = new abstract.A();');
     CompilationUnit unit = parser.parseCompilationUnit2();
     expect(unit, isNotNull);
@@ skipping 1408 matching lines @@
     expectCommentText(typeAlias.documentationComment, '/// Doc');
   }
 
   /**
    * Assert that the given [name] is in declaration context.
    */
   void _assertIsDeclarationName(SimpleIdentifier name) {
     expect(name.inDeclarationContext(), isTrue);
   }
 }