Fix for indexing synthetic enum fields.

pkg/analysis_server/test/services/search/search_engine2_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 test.services.src.search.search_engine2;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/index2/index2.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
@@ skipping 239 matching lines @@
       _expectId(main, MatchKind.READ, 'field); // ref-nq'),
       _expectIdQ(main, MatchKind.READ, 'field); // ref-q'),
       _expectId(main, MatchKind.INVOCATION, 'field(); // inv-nq'),
       _expectIdQ(main, MatchKind.INVOCATION, 'field(); // inv-q'),
       _expectId(main, MatchKind.WRITE, 'field = 2; // ref-nq'),
       _expectIdQ(main, MatchKind.WRITE, 'field = 3; // ref-q'),
     ];
     await _verifyReferences(element, expected);
   }
 
+  test_searchReferences_FieldElement_ofEnum() async {
+    _indexTestUnit('''
+enum MyEnum {
+  A, B, C
+}
+main() {
+  print(MyEnum.A.index);
+  print(MyEnum.values);
+  print(MyEnum.A);
+  print(MyEnum.B);
+}
+''');
+    ClassElement enumElement = findElement('MyEnum');
+    Element mainElement = findElement('main');
+    await _verifyReferences(enumElement.getField('index'),
+        [_expectIdQ(mainElement, MatchKind.READ, 'index);')]);
+    await _verifyReferences(enumElement.getField('values'),
+        [_expectIdQ(mainElement, MatchKind.READ, 'values);')]);
+    await _verifyReferences(enumElement.getField('A'), [
+      _expectIdQ(mainElement, MatchKind.READ, 'A.index);'),
+      _expectIdQ(mainElement, MatchKind.READ, 'A);')
+    ]);
+    await _verifyReferences(enumElement.getField('B'),
+        [_expectIdQ(mainElement, MatchKind.READ, 'B);')]);
+  }
+
   test_searchReferences_FieldElement_synthetic() async {
     _indexTestUnit('''
 class A {
   get field => null;
   set field(x) {}
   main() {
     // getter
     print(field); // ref-nq
     print(this.field); // ref-q
     field(); // inv-nq
@@ skipping 496 matching lines @@
     List<SearchMatch> matches = await searchEngine.searchReferences(element);
     _assertMatches(matches, expectedMatches);
     expect(matches, hasLength(expectedMatches.length));
   }
 
   static void _assertMatches(
       List<SearchMatch> matches, List<ExpectedMatch> expectedMatches) {
     expect(matches, unorderedEquals(expectedMatches));
   }
 }