Add analysis server integration tests for the search domain.

pkg/analysis_server/test/integration/search/find_element_references_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 'dart:async';
+
+import 'package:analysis_server/plugin/protocol/protocol.dart';
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import '../integration_tests.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(FindElementReferencesTest);
+  });
+}
+
+@reflectiveTest
+class FindElementReferencesTest extends AbstractAnalysisServerIntegrationTest {
+  String pathname;
+
+  test_findReferences() async {
+    String text = r'''
+main() {
+  print /* target */ ('Hello');
+}
+''';
+
+    pathname = sourcePath('foo.dart');
+    writeFile(pathname, text);
+    standardAnalysisSetup();
+    await analysisFinished;
+
+    List<SearchResult> results = await _findElementReferences(text);
+    expect(results, hasLength(1));
+    SearchResult result = results.first;
+    expect(result.location.file, pathname);
+    expect(result.isPotential, false);
+    expect(result.kind.name, SearchResultKind.INVOCATION.name);
+    expect(result.path.first.name, 'main');
+  }
+
+  test_badTarget() async {
+    String text = r'''
+main() {
+  if /* target */ (true) {
+    print('Hello');
+  }
+}
+''';
+
+    pathname = sourcePath('foo.dart');
+    writeFile(pathname, text);
+    standardAnalysisSetup();
+    await analysisFinished;
+
+    List<SearchResult> results = await _findElementReferences(text);
+    expect(results, isNull);
+  }
+
+  Future<List<SearchResult>> _findElementReferences(String text) async {
+    int offset = text.indexOf(' /* target */') - 1;
+    SearchFindElementReferencesResult result =
+        await sendSearchFindElementReferences(pathname, offset, false);
+    if (result.id == null) return null;
+    SearchResultsParams searchParams = await onSearchResults.first;
+    expect(searchParams.id, result.id);
+    expect(searchParams.isLast, true);

[Brian Wilkerson, 2017/03/13 22:54:36]

nit: 'true' --> 'isTrue'

[devoncarew, 2017/03/13 23:08:48]

Done.

+    return searchParams.results;
+  }
+
+  @override
+  bool get enableNewAnalysisDriver => true;
+}