Converted Observatory refs elements

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

Index: runtime/observatory/tests/observatory_ui/token_stream_ref/element_test.dart
diff --git a/runtime/observatory/tests/observatory_ui/token_stream_ref/element_test.dart b/runtime/observatory/tests/observatory_ui/token_stream_ref/element_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..16c22fd8a165f70e87ae3bde218364c064a513f5
--- /dev/null
+++ b/runtime/observatory/tests/observatory_ui/token_stream_ref/element_test.dart
@@ -0,0 +1,43 @@
+// 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/token_stream_ref.dart';
+import '../mocks.dart';
+
+main() {
+  TokenStreamRefElement.tag.ensureRegistration();
+
+  const isolate = const IsolateRefMock();
+  const token = const TokenStreamRefMock();
+  const token_named = const TokenStreamRefMock(name: 'name');
+  test('instantiation', () {
+    final e = new TokenStreamRefElement(isolate, token);
+    expect(e, isNotNull, reason: 'element correctly created');
+    expect(e.isolate, equals(isolate));
+    expect(e.token, equals(token));
+  });
+  group('elements', () {
+    test('created after attachment (no name)', () async {
+      final e = new TokenStreamRefElement(isolate, token);
+      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');
+    });
+    test('created after attachment (name)', () async {
+      final e = new TokenStreamRefElement(isolate, token_named);
+      document.body.append(e);
+      await e.onRendered.first;
+      expect(e.children.length, isNonZero, reason: 'has elements');
+      expect(e.innerHtml.contains(token_named.name), isTrue);
+      e.remove();
+      await e.onRendered.first;
+      expect(e.children.length, isZero, reason: 'is empty');
+    });
+  });
+}