Parse 'x.y' as PrefixedIdentifier, not PropertyAccess with Fasta.

pkg/analyzer/test/generated/parser_fasta_test.dart

 // Copyright (c) 2017, 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/token.dart' as analyzer;
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/src/generated/parser.dart' as analyzer;
 import 'package:analyzer/src/generated/utilities_dart.dart';
@@ skipping 267 matching lines @@
   @override
   @failingTest
   void test_assignableExpression_arguments_normal_chain_typeArguments() {
     // TODO(paulberry,ahe): AstBuilder doesn't implement
     // endTypeArguments().
     super.test_assignableExpression_arguments_normal_chain_typeArguments();
   }
 
   @override
   @failingTest
-  void test_assignmentExpression_prefixedIdentifier() {
-    // TODO(paulberry,ahe): Analyzer expects "x.y" to be parsed as a
-    // PrefixedIdentifier, even if x is not a prefix.
-    super.test_assignmentExpression_prefixedIdentifier();
-  }
-
-  @override
-  @failingTest
   void test_cascade_withAssignment() {
     // TODO(paulberry,ahe): AstBuilder doesn't implement
     // endConstructorReference().
     super.test_cascade_withAssignment();
   }
 
   @override
   @failingTest
   void test_conditionalExpression_precedence_nullableType_as() {
     // TODO(paulberry,ahe): Fasta doesn't support NNBD syntax yet.
@@ skipping 103 matching lines @@
   @override
   @failingTest
   void
       test_parseAssignableExpression_identifier_args_dot_typeParameterComments() {
     super
         .test_parseAssignableExpression_identifier_args_dot_typeParameterComments();
   }
 
   @override
   @failingTest
-  void test_parseAssignableExpression_identifier_dot() {
-    super.test_parseAssignableExpression_identifier_dot();
-  }
-
-  @override
-  @failingTest
   void test_parseAwaitExpression() {
     super.test_parseAwaitExpression();
   }
 
   @override
   @failingTest
   void test_parseCascadeSection_ia_typeArgumentComments() {
     super.test_parseCascadeSection_ia_typeArgumentComments();
   }
 
@@ skipping 305 matching lines @@
   @override
   @failingTest
   void
       test_parsePostfixExpression_none_methodInvocation_typeArgumentComments() {
     super
         .test_parsePostfixExpression_none_methodInvocation_typeArgumentComments();
   }
 
   @override
   @failingTest
-  void test_parsePostfixExpression_none_propertyAccess() {
-    super.test_parsePostfixExpression_none_propertyAccess();
-  }
-
-  @override
-  @failingTest
-  void test_parsePrefixedIdentifier_prefix() {
-    super.test_parsePrefixedIdentifier_prefix();
-  }
-
-  @override
-  @failingTest
   void test_parsePrimaryExpression_const() {
     super.test_parsePrimaryExpression_const();
   }
 
   @override
   @failingTest
   void test_parsePrimaryExpression_listLiteral_typed_genericComment() {
     super.test_parsePrimaryExpression_listLiteral_typed_genericComment();
   }
 
@@ skipping 161 matching lines @@
   }
 
   @override
   Expression parseAssignableExpression(String code, bool primaryAllowed) {
     return _parseExpression(code);
   }
 
   @override
   Expression parseAssignableSelector(String code, bool optional,
       {bool allowConditional: true}) {
+    if (optional) {
+      if (code.isEmpty) {
+        return _parseExpression('foo');
+      }
+      return _parseExpression('(foo)$code');
+    }
     return _parseExpression('foo$code');
   }
 
   @override
   AwaitExpression parseAwaitExpression(String code) {
     return _parseExpression(code);
   }
 
   @override
   Expression parseBitwiseAndExpression(String code) {
@@ skipping 779 matching lines @@
   void test_parseTypeAlias_genericFunction_typeParameters_voidReturnType() {
     super.test_parseTypeAlias_genericFunction_typeParameters_voidReturnType();
   }
 
   @override
   @failingTest
   void test_parseTypeAlias_genericFunction_voidReturnType() {
     super.test_parseTypeAlias_genericFunction_voidReturnType();
   }
 }