Fix for indexing synthetic elements.

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 184 matching lines @@
 }
 ''');
     ConstructorElement element = findElement('named');
     Element mainElement = findElement('main');
     var expected = [
       _expectIdQ(mainElement, MatchKind.REFERENCE, '.named();', length: 6)
     ];
     await _verifyReferences(element, expected);
   }
 
+  test_searchReferences_ConstructorElement_synthetic() async {
+    _indexTestUnit('''
+class A {
+}
+main() {
+  new A();
+}
+''');
+    ClassElement classElement = findElement('A');
+    ConstructorElement element = classElement.unnamedConstructor;
+    Element mainElement = findElement('main');
+    var expected = [
+      _expectIdQ(mainElement, MatchKind.REFERENCE, '();', length: 0)
+    ];
+    await _verifyReferences(element, expected);
+  }
+
   test_searchReferences_Element_unknown() async {
     await _verifyReferences(DynamicElementImpl.instance, []);
   }
 
   test_searchReferences_FieldElement() async {
     _indexTestUnit('''
 class A {
   var field;
   A({this.field});
   main() {
@@ skipping 321 matching lines @@
     var expected = [
       _expectId(elementA, MatchKind.REFERENCE, 'ppp.Future'),
       _expectId(elementB, MatchKind.REFERENCE, 'ppp.Stream')
     ];
     await _verifyReferences(element, expected);
   }
 
   test_searchReferences_PropertyAccessorElement_getter() async {
     _indexTestUnit('''
 class A {
-  get g => null;
+  get ggg => null;
   main() {
-    g; // 1
-    this.g; // 2
+    print(ggg); // ref-nq
+    print(this.ggg); // ref-q
+    ggg(); // inv-nq
+    this.ggg(); // inv-q
   }
 }
 ''');
-    PropertyAccessorElement element = findElement('g', ElementKind.GETTER);
-    Element mainElement = findElement('main');
+    PropertyAccessorElement element = findElement('ggg', ElementKind.GETTER);
+    Element main = findElement('main');
     var expected = [
-      _expectId(mainElement, MatchKind.REFERENCE, 'g; // 1'),
-      _expectIdQ(mainElement, MatchKind.REFERENCE, 'g; // 2')
+      _expectId(main, MatchKind.REFERENCE, 'ggg); // ref-nq'),
+      _expectIdQ(main, MatchKind.REFERENCE, 'ggg); // ref-q'),
+      _expectId(main, MatchKind.INVOCATION, 'ggg(); // inv-nq'),
+      _expectIdQ(main, MatchKind.INVOCATION, 'ggg(); // inv-q'),
     ];
     await _verifyReferences(element, expected);
   }
 
   test_searchReferences_PropertyAccessorElement_setter() async {
     _indexTestUnit('''
 class A {
   set s(x) {}
   main() {
     s = 1;
@@ skipping 137 matching lines @@
       Element element, List<ExpectedMatch> expectedMatches) async {
     List<SearchMatch> matches = await searchEngine.searchReferences(element);
     _assertMatches(matches, expectedMatches);
   }
 
   static void _assertMatches(
       List<SearchMatch> matches, List<ExpectedMatch> expectedMatches) {
     expect(matches, unorderedEquals(expectedMatches));
   }
 }