Issue 28386. Implement search for potential usages with the new analysis driver.

pkg/analysis_server/test/services/search/search_engine2_test.dart

 // Copyright (c) 2016, 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 'dart:async';
 
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analysis_server/src/services/search/search_engine_internal2.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 136 matching lines @@
           contains(predicate((SearchMatch m) =>
               m.kind == MatchKind.DECLARATION &&
               m.element.name == name &&
               m.element.nameOffset == nameOffset)));
     }
 
     assertHasElement('test', codeA.indexOf('test; // 1'));
     assertHasElement('test', codeB.indexOf('test() {} // 2'));
   }
 
+  test_searchMemberReferences() async {
+    var a = _p('/test/a.dart');
+    var b = _p('/test/b.dart');
+
+    provider.newFile(
+        a,
+        '''
+class A {
+  int test;
+}
+foo(p) {
+  p.test;
+}
+''');
+    provider.newFile(
+        b,
+        '''
+import 'a.dart';
+bar(p) {
+  p.test = 1;
+}
+''');
+
+    var driver1 = _newDriver();
+    var driver2 = _newDriver();
+
+    driver1.addFile(a);
+    driver2.addFile(b);
+
+    var searchEngine = new SearchEngineImpl2([driver1, driver2]);
+    List<SearchMatch> matches =
+        await searchEngine.searchMemberReferences('test');
+    expect(matches, hasLength(2));
+    expect(
+        matches,
+        contains(predicate((SearchMatch m) =>
+            m.element.name == 'foo' || m.kind == MatchKind.READ)));
+    expect(
+        matches,
+        contains(predicate((SearchMatch m) =>
+            m.element.name == 'bar' || m.kind == MatchKind.WRITE)));
+  }
+
   test_searchReferences() async {
     var a = _p('/test/a.dart');
     var b = _p('/test/b.dart');
 
     provider.newFile(
         a,
         '''
 class T {}
 T a;
 ''');
@@ skipping 75 matching lines @@
       contentOverlay,
       'test',
       new SourceFactory(
           [new DartUriResolver(sdk), new ResourceUriResolver(provider)],
           null,
           provider),
       new AnalysisOptionsImpl()..strongMode = true);
 
   String _p(String path) => provider.convertPath(path);
 }