Implement SearchEngine.searchMemberDeclarations() for the new driver.

pkg/analyzer/test/src/dart/analysis/search_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:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
@@ skipping 53 matching lines @@
 }
 
 @reflectiveTest
 class SearchTest extends BaseAnalysisDriverTest {
   static const testUri = 'package:test/test.dart';
 
   CompilationUnit testUnit;
   CompilationUnitElement testUnitElement;
   LibraryElement testLibraryElement;
 
+  test_classMembers() async {
+    await _resolveTestUnit('''
+class A {
+  test() {}
+}
+class B {
+  int test = 1;
+  int testTwo = 2;
+  main() {
+    int test = 3;
+  }
+}
+''');
+    ClassElement a = _findElement('A');
+    ClassElement b = _findElement('B');
+    RegExp regExp = new RegExp(r'^test$');
+    expect(await driver.search.classMembers(regExp),
+        unorderedEquals([a.methods[0], b.fields[0]]));
+  }
+
   test_searchReferences_ClassElement_definedInside() async {
     await _resolveTestUnit('''
 class A {};
 main(A p) {
   A v;
 }
 class B1 extends A {} // extends
 class B2 implements A {} // implements
 class B3 extends Object with A {} // with
 List<A> v2 = null;
@@ skipping 906 matching lines @@
     List<SearchResult> results = await driver.search.references(element);
     _assertResults(results, expectedMatches);
     expect(results, hasLength(expectedMatches.length));
   }
 
   static void _assertResults(
       List<SearchResult> matches, List<ExpectedResult> expectedMatches) {
     expect(matches, unorderedEquals(expectedMatches));
   }
 }