Converted Observatory class-nav-menu element

runtime/observatory/tests/observatory_ui/nav/class-menu/element_test.dart

Index: runtime/observatory/tests/observatory_ui/nav/class-menu/element_test.dart
diff --git a/runtime/observatory/tests/observatory_ui/nav/class-menu/element_test.dart b/runtime/observatory/tests/observatory_ui/nav/class-menu/element_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..df83ea482787580effac6bf8ac7b31f3af2a2ef8
--- /dev/null
+++ b/runtime/observatory/tests/observatory_ui/nav/class-menu/element_test.dart
@@ -0,0 +1,29 @@
+// 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/mocks.dart';
+import 'package:observatory/src/elements/nav/class_menu.dart';
+
+main(){
+  NavClassMenuElement.tag.ensureRegistration();
+
+  final IsolateRefMock i_ref = const IsolateRefMock(id: 'i-id', name: 'i-name');
+  final ClassRefMock c_ref = const ClassRefMock(id: 'c-id', name: 'c-name');
+  test('instantiation', () {
+    final NavClassMenuElement e = new NavClassMenuElement(i_ref, c_ref);
+    expect(e, isNotNull, reason: 'element correctly created');
+    expect(e.isolate, equals(i_ref));
+    expect(e.cls, equals(c_ref));
+  });
+  test('elements created after attachment', () async {
+    final NavClassMenuElement e = new NavClassMenuElement(i_ref, c_ref);
+    document.body.append(e);
+    await e.onRendered.first;
+    expect(e.shadowRoot.children.length, isNonZero, reason: 'has elements');
+    e.remove();
+    await e.onRendered.first;
+    expect(e.shadowRoot.children.length, isZero, reason: 'is empty');
+  });
+}