Converted Observatory field-view element

runtime/observatory/tests/observatory_ui/class_tree/element_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:html';
 import 'package:unittest/unittest.dart';
 import 'package:observatory/src/elements/class_tree.dart';
 import 'package:observatory/src/elements/nav/notify.dart';
 import '../mocks.dart';
 
@@ skipping 21 matching lines @@
       const child2 = const ClassMock(id: child2_id);
       const child1_1 = const ClassMock(id: child1_1_id);
       const child1 = const ClassMock(id: child1_id,
                                      subclasses: const [child1_1]);
       const object = const ClassMock(id: 'o-id',
                                      subclasses: const [child1, child2]);
       const ids = const [child1_id, child1_1_id, child2_id];
       bool rendered = false;
       final e = new ClassTreeElement(vm, isolate, events, notifications,
           new ClassRepositoryMock(
-              object: expectAsync(() async {
+              object: expectAsync((i) async {
+                expect(i, equals(isolate));
                 expect(rendered, isFalse);
                 return object;
               }, count: 1),
-              getter: expectAsync((id) async {
+              getter: expectAsync((i, id) async {
+                expect(i, equals(isolate));
                 expect(ids.contains(id), isTrue);
                 switch (id) {
                   case child1_id: return child1;
                   case child1_1_id: return child1_1;
                   case child2_id: return child2;
                   default: return null;
                 }
               }, count: 3)));
       document.body.append(e);
       await e.onRendered.first;
       rendered = true;
       expect(e.children.length, isNonZero, reason: 'has elements');
       expect(e.querySelectorAll(nTag).length, equals(1));
       e.remove();
       await e.onRendered.first;
       expect(e.children.length, isZero, reason: 'is empty');
     });
   });
 }