Run the parser recovery tests under 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.
 
 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';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/error/listener.dart';
@@ skipping 8815 matching lines @@
     expect(components, hasLength(count));
     for (int i = 0; i < count; i++) {
       SimpleIdentifier component = components[i];
       expect(component, isNotNull);
       expect(component.name, expectedComponents[i]);
     }
   }
 }
 
 /**
- * The class `RecoveryParserTest` defines parser tests that test the parsing of invalid code
- * sequences to ensure that the correct recovery steps are taken in the parser.
+ * The class `RecoveryParserTest` defines parser tests that test the parsing of
+ * invalid code sequences to ensure that the correct recovery steps are taken in
+ * the parser.
  */
 @reflectiveTest
-class RecoveryParserTest extends ParserTestCase {
+class RecoveryParserTest extends ParserTestCase with RecoveryParserTestMixin {}
+
+abstract class RecoveryParserTestMixin implements AbstractParserTestCase {
   void test_additiveExpression_missing_LHS() {
     BinaryExpression expression =
         parseExpression("+ y", [ParserErrorCode.MISSING_IDENTIFIER]);
     EngineTestCase.assertInstanceOf((obj) => obj is SimpleIdentifier,
         SimpleIdentifier, expression.leftOperand);
     expect(expression.leftOperand.isSynthetic, isTrue);
   }
 
   void test_additiveExpression_missing_LHS_RHS() {
     BinaryExpression expression = parseExpression("+", [
@@ skipping 6616 matching lines @@
     expectCommentText(typeVariable.documentationComment, '/// Doc');
   }
 
   /**
    * Assert that the given [name] is in declaration context.
    */
   void _assertIsDeclarationName(SimpleIdentifier name) {
     expect(name.inDeclarationContext(), isTrue);
   }
 }