Converted Observatory icdata-view element

R=johnmccutchan@google.com

Review URL: https://codereview.chromium.org/2271083002 .

runtime/observatory/lib/elements.dart

@@ -12,7 +12,6 @@ export 'package:observatory/src/elements/eval_link.dart';
 export 'package:observatory/src/elements/field_view.dart';
 export 'package:observatory/src/elements/function_view.dart';
 export 'package:observatory/src/elements/heap_map.dart';
-export 'package:observatory/src/elements/icdata_view.dart';
 export 'package:observatory/src/elements/instance_view.dart';
 export 'package:observatory/src/elements/isolate_reconnect.dart';
 export 'package:observatory/src/elements/isolate_summary.dart';
@@ -64,6 +63,7 @@ import 'package:observatory/src/elements/function_ref_wrapper.dart';
 import 'package:observatory/src/elements/general_error.dart';
 import 'package:observatory/src/elements/heap_snapshot.dart';
 import 'package:observatory/src/elements/icdata_ref.dart';
+import 'package:observatory/src/elements/icdata_view.dart';
 import 'package:observatory/src/elements/instance_ref.dart';
 import 'package:observatory/src/elements/instance_ref_wrapper.dart';
 import 'package:observatory/src/elements/isolate_reconnect.dart';
@@ -137,6 +137,7 @@ export 'package:observatory/src/elements/function_ref.dart';
 export 'package:observatory/src/elements/general_error.dart';
 export 'package:observatory/src/elements/heap_snapshot.dart';
 export 'package:observatory/src/elements/icdata_ref.dart';
+export 'package:observatory/src/elements/icdata_view.dart';
 export 'package:observatory/src/elements/instance_ref.dart';
 export 'package:observatory/src/elements/isolate_reconnect.dart';
 export 'package:observatory/src/elements/isolate_ref.dart';
@@ -200,6 +201,7 @@ Future initElements() async {
   GeneralErrorElement.tag.ensureRegistration();
   HeapSnapshotElement.tag.ensureRegistration();
   ICDataRefElement.tag.ensureRegistration();
+  ICDataViewElement.tag.ensureRegistration();
   InstanceRefElement.tag.ensureRegistration();
   InstanceRefElementWrapper.tag.ensureRegistration();
   IsolateCounterChartElement.tag.ensureRegistration();

runtime/observatory/lib/elements.html

@@ -10,7 +10,6 @@
 <link rel="import" href="src/elements/function_view.html">
 <link rel="import" href="src/elements/heap_map.html">
 <link rel="import" href="src/elements/instance_view.html">
-<link rel="import" href="src/elements/icdata_view.html">
 <link rel="import" href="src/elements/isolate_summary.html">
 <link rel="import" href="src/elements/isolate_view.html">
 <link rel="import" href="src/elements/json_view.html">

runtime/observatory/lib/models.dart

@@ -54,6 +54,7 @@ part 'src/models/repositories/context.dart';
 part 'src/models/repositories/event.dart';
 part 'src/models/repositories/flag.dart';
 part 'src/models/repositories/heap_snapshot.dart';
+part 'src/models/repositories/icdata.dart';
 part 'src/models/repositories/inbound_references.dart';
 part 'src/models/repositories/instance.dart';
 part 'src/models/repositories/notification.dart';

runtime/observatory/lib/repositories.dart

@@ -21,6 +21,7 @@ part 'src/repositories/context.dart';
 part 'src/repositories/event.dart';
 part 'src/repositories/flag.dart';
 part 'src/repositories/heap_snapshot.dart';
+part 'src/repositories/icdata.dart';
 part 'src/repositories/inbound_references.dart';
 part 'src/repositories/instance.dart';
 part 'src/repositories/notification.dart';

runtime/observatory/lib/src/app/page.dart

@@ -9,6 +9,7 @@ AllocationProfileRepository _allocationProfileRepository
 ContextRepository _contextRepository = new ContextRepository();
 HeapSnapshotRepository _heapSnapshotRepository
     = new HeapSnapshotRepository();
+ICDataRepository _icdataRepository = new ICDataRepository();
 InboundReferencesRepository _inboundReferencesRepository
     = new InboundReferencesRepository();
 InstanceRepository _instanceRepository = new InstanceRepository();
@@ -193,6 +194,18 @@ class InspectPage extends MatchingPage {
                                _instanceRepository,
                                queue: app.queue)
       ];
+    } else if (obj is ICData) {
+      container.children = [
+        new ICDataViewElement(app.vm, obj.isolate, obj, app.events,
+                               app.notifications,
+                               _icdataRepository,
+                               _retainedSizeRepository,
+                               _reachableSizeRepository,
+                               _inboundReferencesRepository,
+                               _retainingPathRepository,
+                               _instanceRepository,
+                               queue: app.queue)
+      ];
     } else {
       ServiceObjectViewElement serviceElement =new Element.tag('service-view');
       serviceElement.object = obj;

runtime/observatory/lib/src/elements/context_view.dart

@@ -19,6 +19,7 @@ import 'package:observatory/src/elements/nav/refresh.dart';
 import 'package:observatory/src/elements/nav/top_menu.dart';
 import 'package:observatory/src/elements/nav/vm_menu.dart';
 import 'package:observatory/src/elements/object_common.dart';
+import 'package:observatory/src/elements/view_footer.dart';
 
 class ContextViewElement  extends HtmlElement implements Renderable {
   static const tag = const Tag<ContextViewElement>('context-view',
@@ -33,7 +34,8 @@ class ContextViewElement  extends HtmlElement implements Renderable {
                                               NavMenuElement.tag,
                                               NavRefreshElement.tag,
                                               NavNotifyElement.tag,
-                                              ObjectCommonElement.tag
+                                              ObjectCommonElement.tag,
+                                              ViewFooterElement.tag
                                             ]);
 
   RenderingScheduler<ContextViewElement> _r;
@@ -183,6 +185,8 @@ class ContextViewElement  extends HtmlElement implements Renderable {
           ]
       ]);
     }
+    content.add(new DivElement()..classes = const ['content-centered-big']
+      ..children = [new ViewFooterElement(queue: _r.queue)]);
     children = content;
   }
 }

runtime/observatory/lib/src/elements/css/shared.css

@@ -850,6 +850,21 @@ heap-snapshot .tree-item > .name {
 }
 
 
+/* icdata-ref */
+
+icdata-ref > a[href]:hover {
+    text-decoration: underline;
+}
+
+icdata-ref > a[href] {
+    color: #0489c3;
+    text-decoration: none;
+}
+
+icdata-ref > a[href] * {
+    color: inherit;
+}
+
 /* inbound-reference */
 
 inbound-reference > a[href]:hover {

runtime/observatory/lib/src/elements/icdata_view.dart

@@ -1,21 +1,179 @@
-// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2013, 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 icdata_view;
-
 import 'dart:async';
-import 'observatory_element.dart';
-import 'package:observatory/service.dart';
-import 'package:polymer/polymer.dart';
+import 'dart:html';
+import 'package:observatory/models.dart' as M;
+import 'package:observatory/src/elements/curly_block.dart';
+import 'package:observatory/src/elements/helpers/any_ref.dart';
+import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
+import 'package:observatory/src/elements/helpers/tag.dart';
+import 'package:observatory/src/elements/nav/bar.dart';
+import 'package:observatory/src/elements/nav/isolate_menu.dart';
+import 'package:observatory/src/elements/nav/menu.dart';
+import 'package:observatory/src/elements/nav/notify.dart';
+import 'package:observatory/src/elements/nav/refresh.dart';
+import 'package:observatory/src/elements/nav/top_menu.dart';
+import 'package:observatory/src/elements/nav/vm_menu.dart';
+import 'package:observatory/src/elements/object_common.dart';
+import 'package:observatory/src/elements/view_footer.dart';
 
-@CustomTag('icdata-view')
-class ICDataViewElement extends ObservatoryElement {
-  @published ICData icData;
+class ICDataViewElement  extends HtmlElement implements Renderable {
+  static const tag = const Tag<ICDataViewElement>('icdata-view',
+                                            dependencies: const [
+                                              CurlyBlockElement.tag,
+                                              NavBarElement.tag,
+                                              NavTopMenuElement.tag,
+                                              NavVMMenuElement.tag,
+                                              NavIsolateMenuElement.tag,
+                                              NavMenuElement.tag,
+                                              NavRefreshElement.tag,
+                                              NavNotifyElement.tag,
+                                              ObjectCommonElement.tag,
+                                              ViewFooterElement.tag
+                                            ]);
+
+  RenderingScheduler<ICDataViewElement> _r;
+
+  Stream<RenderedEvent<ICDataViewElement>> get onRendered => _r.onRendered;
+
+  M.VM _vm;
+  M.IsolateRef _isolate;
+  M.EventRepository _events;
+  M.NotificationRepository _notifications;
+  M.ICData _icdata;
+  M.ICDataRepository _icdatas;
+  M.RetainedSizeRepository _retainedSizes;
+  M.ReachableSizeRepository _reachableSizes;
+  M.InboundReferencesRepository _references;
+  M.RetainingPathRepository _retainingPaths;
+  M.InstanceRepository _instances;
+
+
+  M.VMRef get vm => _vm;
+  M.IsolateRef get isolate => _isolate;
+  M.NotificationRepository get notifications => _notifications;
+  M.ICData get icdata => _icdata;
+
+  factory ICDataViewElement(M.VM vm, M.IsolateRef isolate, M.ICData icdata,
+                            M.EventRepository events,
+                            M.NotificationRepository notifications,
+                            M.ICDataRepository icdatas,
+                            M.RetainedSizeRepository retainedSizes,
+                            M.ReachableSizeRepository reachableSizes,
+                            M.InboundReferencesRepository references,
+                            M.RetainingPathRepository retainingPaths,
+                            M.InstanceRepository instances,
+                            {RenderingQueue queue}) {
+    assert(vm != null);
+    assert(isolate != null);
+    assert(events != null);
+    assert(notifications != null);
+    assert(icdata != null);
+    assert(icdatas != null);
+    assert(retainedSizes != null);
+    assert(reachableSizes != null);
+    assert(references != null);
+    assert(retainingPaths != null);
+    assert(instances != null);
+    ICDataViewElement e = document.createElement(tag.name);
+    e._r = new RenderingScheduler(e, queue: queue);
+    e._vm = vm;
+    e._isolate = isolate;
+    e._events = events;
+    e._notifications = notifications;
+    e._icdata = icdata;
+    e._icdatas = icdatas;
+    e._retainedSizes = retainedSizes;
+    e._reachableSizes = reachableSizes;
+    e._references = references;
+    e._retainingPaths = retainingPaths;
+    e._instances = instances;
+    return e;
+  }
 
   ICDataViewElement.created() : super.created();
 
-  Future refresh() {
-    return icData.reload();
+  @override
+  attached() {
+    super.attached();
+    _r.enable();
+  }
+
+  @override
+  detached() {
+    super.detached();
+    _r.disable(notify: true);
+    children = [];
+  }
+
+  void render() {
+    children = [
+      new NavBarElement(queue: _r.queue)
+        ..children = [
+          new NavTopMenuElement(queue: _r.queue),
+          new NavVMMenuElement(_vm, _events, queue: _r.queue),
+          new NavIsolateMenuElement(_isolate, _events, queue: _r.queue),
+          new NavMenuElement('instance', last: true, queue: _r.queue),
+          new NavRefreshElement(queue: _r.queue)
+              ..onRefresh.listen((e) async {
+                e.element.disabled = true;
+                _icdata = await _icdatas.get(_isolate, _icdata.id);
+                _r.dirty();
+              }),
+          new NavNotifyElement(_notifications, queue: _r.queue)
+        ],
+
+      new DivElement()..classes = const ['content-centered-big']
+        ..children = [
+          new HeadingElement.h2()..text = 'ICData',
+          new HRElement(),
+          new ObjectCommonElement(_isolate, _icdata, _retainedSizes,
+                                  _reachableSizes, _references, _retainingPaths,
+                                  _instances, queue: _r.queue),
+          new DivElement()..classes = ['memberList']
+            ..children = [
+              new DivElement()..classes = ['memberItem']
+                ..children = [
+                  new DivElement()..classes = ['memberName']
+                    ..text = 'owner',
+                  new DivElement()..classes = ['memberName']
+                    ..children = [
+                      _icdata.dartOwner == null
+                        ? (new SpanElement()..text = '<none>')
+                        : anyRef(_isolate, _icdata.dartOwner, _instances,
+                                queue: _r.queue)
+                    ]
+                ],
+              new DivElement()..classes = ['memberItem']
+                ..children = [
+                  new DivElement()..classes = ['memberName']
+                    ..text = 'argumentsDescriptor',
+                  new DivElement()..classes = ['memberName']
+                    ..children = [
+                      _icdata.argumentsDescriptor == null
+                        ? (new SpanElement()..text = '<none>')
+                        : anyRef(_isolate, _icdata.argumentsDescriptor,
+                                 _instances, queue: _r.queue)
+                    ]
+                ],
+              new DivElement()..classes = ['memberItem']
+                ..children = [
+                  new DivElement()..classes = ['memberName']
+                    ..text = 'entries',
+                  new DivElement()..classes = ['memberName']
+                    ..children = [
+                      _icdata.entries == null
+                        ? (new SpanElement()..text = '<none>')
+                        : anyRef(_isolate, _icdata.entries, _instances,
+                                 queue: _r.queue)
+                    ]
+                ]
+            ],
+            new HRElement(),
+            new ViewFooterElement(queue: _r.queue)
+        ]
+    ];
   }
 }

runtime/observatory/lib/src/elements/icdata_view.html

@@ -1,56 +0,0 @@
-<link rel="import" href="../../../../packages/polymer/polymer.html">
-<link rel="import" href="error_view.html">
-<link rel="import" href="eval_link.html">
-
-<polymer-element name="icdata-view">
-  <template>
-    <link rel="stylesheet" href="css/shared.css">
-    <nav-bar>
-      <top-nav-menu></top-nav-menu>
-      <vm-nav-menu vm="{{ icData.isolate.vm }}"></vm-nav-menu>
-      <isolate-nav-menu isolate="{{ icData.isolate }}"></isolate-nav-menu>
-      <nav-menu link="." anchor="object" last="{{ true }}"></nav-menu>
-      <nav-refresh callback="{{ refresh }}"></nav-refresh>
-      <nav-notify notifications="{{ app.notifications }}"></nav-notify>
-    </nav-bar>
-
-    <div class="content">
-      <object-common object="{{ icData }}"></object-common>
-
-      <br><br>
-
-      <div class="memberList">
-        <div class="memberItem">
-          <div class="memberName">selector</div>
-          <div class="memberValue">
-            {{ icData.selector }}
-          </div>
-        </div>
-        <div class="memberItem">
-          <div class="memberName">owner</div>
-          <div class="memberValue">
-            <any-service-ref ref="{{ icData.dartOwner }}"></any-service-ref>
-          </div>
-        </div>
-        <div class="memberItem">
-          <div class="memberName">argumentsDescriptor</div>
-          <div class="memberValue">
-            <any-service-ref ref="{{ icData.argumentsDescriptor }}"></any-service-ref>
-          </div>
-        </div>
-        <div class="memberItem">
-          <div class="memberName">entries</div>
-          <div class="memberValue">
-            <any-service-ref ref="{{ icData.entries }}"></any-service-ref>
-          </div>
-        </div>
-      </div>
-
-    </div>
-
-    <hr>
-    <view-footer></view-footer>
-  </template>
-</polymer-element>
-
-<script type="application/dart" src="icdata_view.dart"></script>

runtime/observatory/lib/src/elements/object_common.dart

@@ -111,7 +111,7 @@ class ObjectCommonElement extends HtmlElement implements Renderable {
               new DivElement()..classes = const ['memberName']
                 ..text = 'Shallow size ',
               new DivElement()..classes = const ['memberValue']
-                ..text = Utils.formatSize(_object.size)
+                ..text = Utils.formatSize(_object.size ?? 0)
             ],
           new DivElement()..classes = const ['memberItem']
             ..title = 'Space reachable from this object, '

runtime/observatory/lib/src/elements/service_view.dart

@@ -49,10 +49,6 @@ class ServiceObjectViewElement extends ObservatoryElement {
       case 'Object':
         return (object) {
           switch (object.vmType) {
-            case 'ICData':
-              ICDataViewElement element = new Element.tag('icdata-view');
-              element.icData = object;
-              return element;
             case 'MegamorphicCache':
               MegamorphicCacheViewElement element =
                   new Element.tag('megamorphiccache-view');

runtime/observatory/lib/src/models/objects/icdata.dart

@@ -7,3 +7,9 @@ part of models;
 abstract class ICDataRef extends ObjectRef {
   String get selector;
 }
+
+abstract class ICData extends Object implements ICDataRef {
+  ObjectRef get dartOwner;
+  InstanceRef get argumentsDescriptor;
+  InstanceRef get entries;
+}

runtime/observatory/lib/src/models/repositories/icdata.dart

@@ -0,0 +1,9 @@
+// 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
+
+part of models;
+
+abstract class ICDataRepository {
+  Future<ICData> get(IsolateRef isolate, String id);
+}

runtime/observatory/lib/src/repositories/icdata.dart

@@ -0,0 +1,15 @@
+// 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
+
+part of repositories;
+
+class ICDataRepository extends M.ICDataRepository {
+  ICDataRepository();
+
+  Future<M.ICData> get(M.IsolateRef i, String id) async{
+    S.Isolate isolate = i as S.Isolate;
+    assert(isolate != null);
+    return (await isolate.getObject(id)) as S.ICData;
+  }
+}

runtime/observatory/lib/src/service/object.dart

@@ -3594,8 +3594,8 @@ class ObjectPool extends HeapObject implements M.ObjectPoolRef {
   }
 }
 
-class ICData extends HeapObject implements M.ICDataRef {
-  @observable ServiceObject dartOwner;
+class ICData extends HeapObject implements M.ICData {
+  @observable HeapObject dartOwner;
   @observable String selector;
   @observable Instance argumentsDescriptor;
   @observable Instance entries;

runtime/observatory/observatory_sources.gypi

@@ -88,7 +88,6 @@
     'lib/src/elements/helpers/uris.dart',
     'lib/src/elements/icdata_ref.dart',
     'lib/src/elements/icdata_view.dart',
-    'lib/src/elements/icdata_view.html',
     'lib/src/elements/img/chromium_icon.png',
     'lib/src/elements/img/dart_icon.png',
     'lib/src/elements/img/isolate_icon.png',
@@ -232,6 +231,7 @@
     'lib/src/models/repositories/event.dart',
     'lib/src/models/repositories/flag.dart',
     'lib/src/models/repositories/heap_snapshot.dart',
+    'lib/src/models/repositories/icdata.dart',
     'lib/src/models/repositories/inbound_references.dart',
     'lib/src/models/repositories/instance.dart',
     'lib/src/models/repositories/notification.dart',
@@ -248,6 +248,7 @@
     'lib/src/repositories/event.dart',
     'lib/src/repositories/flag.dart',
     'lib/src/repositories/heap_snapshot.dart',
+    'lib/src/repositories/icdata.dart',
     'lib/src/repositories/inbound_references.dart',
     'lib/src/repositories/instance.dart',
     'lib/src/repositories/notification.dart',

runtime/observatory/tests/observatory_ui/icdata_view/element_test.dart

@@ -0,0 +1,58 @@
+// 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/icdata_view.dart';
+import 'package:observatory/src/elements/nav/refresh.dart';
+import 'package:observatory/src/elements/object_common.dart';
+import '../mocks.dart';
+
+main() {
+  ICDataViewElement.tag.ensureRegistration();
+
+  final cTag = ObjectCommonElement.tag.name;
+  final rTag = NavRefreshElement.tag.name;
+
+  const vm = const VMMock();
+  const isolate = const IsolateRefMock();
+  final events = new EventRepositoryMock();
+  final notifs = new NotificationRepositoryMock();
+  final icdata = const ICDataMock();
+  final icdatas = new ICDataRepositoryMock();
+  final reachableSizes = new ReachableSizeRepositoryMock();
+  final retainedSizes = new RetainedSizeRepositoryMock();
+  final inbounds = new InboundReferencesRepositoryMock();
+  final paths = new RetainingPathRepositoryMock();
+  final instances = new InstanceRepositoryMock();
+  test('instantiation', () {
+    final e = new ICDataViewElement(vm, isolate, icdata, events, notifs,
+                                     icdatas, retainedSizes, reachableSizes,
+                                     inbounds, paths, instances);
+    expect(e, isNotNull, reason: 'element correctly created');
+    expect(e.isolate, equals(isolate));
+    expect(e.icdata, equals(icdata));
+  });
+  test('elements created after attachment', () async {
+    final icdatas = new ICDataRepositoryMock(
+      getter: expectAsync((i, id) async {
+        expect(i, equals(isolate));
+        expect(id, equals(icdata.id));
+        return icdata;
+      }, count: 1)
+    );
+    final e = new ICDataViewElement(vm, isolate, icdata, events, notifs,
+                                     icdatas, retainedSizes, reachableSizes,
+                                     inbounds, paths, instances);
+    document.body.append(e);
+    await e.onRendered.first;
+    expect(e.children.length, isNonZero, reason: 'has elements');
+    expect(e.querySelectorAll(cTag).length, equals(1));
+    (e.querySelector(rTag) as NavRefreshElement).refresh();
+    await e.onRendered.first;
+    e.remove();
+    await e.onRendered.first;
+    expect(e.children.length, isZero, reason: 'is empty');
+  });
+}

runtime/observatory/tests/observatory_ui/icdata_view/element_test.html

@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta http-equiv="X-UA-Compatible" content="IE=edge">
+  <meta name="dart.unittest" content="full-stack-traces">
+  <style>
+     .unittest-table { font-family:monospace; border:1px; }
+     .unittest-pass { background: #6b3;}
+     .unittest-fail { background: #d55;}
+     .unittest-error { background: #a11;}
+  </style>
+  <script src="/packages/web_components/webcomponents.js"></script>
+  <script src="/packages/web_components/dart_support.js"></script>
+</head>
+<body>
+  <script type="text/javascript"
+      src="/root_dart/tools/testing/dart/test_controller.js"></script>
+  %TEST_SCRIPTS%
+</body>
+</html>

runtime/observatory/tests/observatory_ui/mocks.dart

@@ -49,6 +49,7 @@ part 'mocks/repositories/context.dart';
 part 'mocks/repositories/event.dart';
 part 'mocks/repositories/flag.dart';
 part 'mocks/repositories/heap_snapshot.dart';
+part 'mocks/repositories/icdata.dart';
 part 'mocks/repositories/inbound_references.dart';
 part 'mocks/repositories/instance.dart';
 part 'mocks/repositories/notification.dart';

runtime/observatory/tests/observatory_ui/mocks/objects/icdata.dart

@@ -10,3 +10,17 @@ class ICDataRefMock implements M.ICDataRef {
 
   const ICDataRefMock({this.id: 'icdata-id', this.selector});
 }
+
+class ICDataMock implements M.ICData {
+  final String id;
+  final M.ClassRef clazz;
+  final int size;
+  final String selector;
+  final M.ObjectRef dartOwner;
+  final M.InstanceRef argumentsDescriptor;
+  final M.InstanceRef entries;
+
+  const ICDataMock({this.id: 'icdata-id', this.clazz: const ClassRefMock(),
+                    this.size: 0, this.selector, this.dartOwner,
+                    this.argumentsDescriptor, this.entries});
+}

runtime/observatory/tests/observatory_ui/mocks/repositories/icdata.dart

@@ -0,0 +1,22 @@
+// 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.
+
+part of mocks;
+
+typedef Future<M.ICData> ICDataRepositoryMockCallback(M.IsolateRef isolate,
+                                                      String id);
+
+class ICDataRepositoryMock implements M.ICDataRepository {
+  final ICDataRepositoryMockCallback _get;
+
+  ICDataRepositoryMock({ICDataRepositoryMockCallback getter})
+    : _get = getter;
+
+  Future<M.ICData> get(M.IsolateRef isolate, String id, {int count}){
+    if (_get != null) {
+      return _get(isolate, id);
+    }
+    return new Future.value(null);
+  }
+}