Converted Observatory cpu-profile element

runtime/observatory/tests/observatory_ui/cpu_profile/virtual-tree/element_test.dart

Index: runtime/observatory/tests/observatory_ui/cpu_profile/virtual-tree/element_test.dart
diff --git a/runtime/observatory/tests/observatory_ui/cpu_profile/virtual-tree/element_test.dart b/runtime/observatory/tests/observatory_ui/cpu_profile/virtual-tree/element_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..cb93e56cf93cb289bf9e5af718c82038641b9743
--- /dev/null
+++ b/runtime/observatory/tests/observatory_ui/cpu_profile/virtual-tree/element_test.dart
@@ -0,0 +1,53 @@
+// 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/models.dart' as M;
+import 'package:observatory/src/elements/cpu_profile/virtual_tree.dart';
+import '../../mocks.dart';
+
+main() {
+  CpuProfileVirtualTreeElement.tag.ensureRegistration();
+  const isolate = const IsolateRefMock();
+  group('instantiation', () {
+    final profile = new SampleProfileMock();
+    test('default', () {
+      final e = new CpuProfileVirtualTreeElement(isolate, profile);
+      expect(e, isNotNull, reason: 'element correctly created');
+      expect(e.isolate, equals(isolate));
+      expect(e.profile, equals(profile));
+      expect(e.mode, equals(ProfileTreeMode.function));
+      expect(e.direction, equals(M.ProfileTreeDirection.exclusive));
+    });
+    test('mode', () {
+      final e = new CpuProfileVirtualTreeElement(isolate, profile,
+          mode: ProfileTreeMode.code);
+      expect(e, isNotNull, reason: 'element correctly created');
+      expect(e.isolate, equals(isolate));
+      expect(e.profile, equals(profile));
+      expect(e.mode, equals(ProfileTreeMode.code));
+      expect(e.direction, equals(M.ProfileTreeDirection.exclusive));
+    });
+    test('direction', () {
+      final e = new CpuProfileVirtualTreeElement(isolate, profile,
+          direction: M.ProfileTreeDirection.inclusive);
+      expect(e, isNotNull, reason: 'element correctly created');
+      expect(e.isolate, equals(isolate));
+      expect(e.profile, equals(profile));
+      expect(e.mode, equals(ProfileTreeMode.function));
+      expect(e.direction, equals(M.ProfileTreeDirection.inclusive));
+    });
+  });
+  test('elements created after attachment', () async {
+    final profile = new SampleProfileMock();
+    final e = new CpuProfileVirtualTreeElement(isolate, profile);
+    document.body.append(e);
+    await e.onRendered.first;
+    expect(e.children.length, isNonZero, reason: 'has elements');
+    e.remove();
+    await e.onRendered.first;
+    expect(e.children.length, isZero, reason: 'is empty');
+  });
+}