Converted Observatory context-view element

runtime/observatory/tests/observatory_ui/context/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/context_view.dart';
+import 'package:observatory/src/elements/nav/refresh.dart';
+import 'package:observatory/src/elements/object_common.dart';
+import '../mocks.dart';
+
+main() {
+  ContextViewElement.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 context = const ContextMock();
+  final contexts = new ContextRepositoryMock();
+  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 ContextViewElement(vm, isolate, context, events, notifs,
+                                     contexts, retainedSizes, reachableSizes,
+                                     inbounds, paths, instances);
+    expect(e, isNotNull, reason: 'element correctly created');
+    expect(e.isolate, equals(isolate));
+    expect(e.context, equals(context));
+  });
+  test('elements created after attachment', () async {
+    final contexts = new ContextRepositoryMock(
+      getter: expectAsync((i, id) async {
+        expect(i, equals(isolate));
+        expect(id, equals(context.id));
+        return context;
+      }, count: 1)
+    );
+    final e = new ContextViewElement(vm, isolate, context, events, notifs,
+                                     contexts, 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');
+  });
+}