Converted Observatory nav-notify element

runtime/observatory/tests/observatory_ui/nav/notify_event/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 'dart:async';
+import 'package:unittest/unittest.dart';
+import 'package:observatory/mocks.dart';
+import 'package:observatory/src/elements/nav/notify_event.dart';
+
+main() {
+  NavNotifyEventElement.tag.ensureRegistration();
+
+  final PauseStartEventMock event = new PauseStartEventMock(
+              isolate: new IsolateMock(id: 'isolate-id', name: 'isolate-name'));
+  group('instantiation', () {
+    final NavNotifyEventElement e = new NavNotifyEventElement(event);
+    expect(e, isNotNull, reason: 'element correctly created');
+    expect(e.event, equals(event));
+  });
+  group('elements', () {
+    test('created after attachment', () async {
+      final NavNotifyEventElement e = new NavNotifyEventElement(event);
+      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');
+    });
+  });
+  group('events are fired', () {
+    NavNotifyEventElement e;
+    StreamSubscription sub;
+    setUp(() async {
+      e = new NavNotifyEventElement(event);
+      document.body.append(e);
+      await e.onRendered.first;
+    });
+    tearDown(() {
+      sub.cancel();
+      e.remove();
+    });
+    test('navigation after connect', () async {
+      sub = window.onPopState.listen(expectAsync((_) {}, count: 1,
+        reason: 'event is fired'));
+      e.querySelector('a').click();
+    });
+    test('onDelete events (DOM)', () async {
+      sub = e.onDelete.listen(expectAsync((EventDeleteEvent ev) {
+        expect(ev, isNotNull, reason: 'event is passed');
+        expect(ev.event, equals(event),
+                                            reason: 'exception is the same');
+      }, count: 1, reason: 'event is fired'));
+      e.querySelector('button').click();
+    });
+    test('onDelete events (code)', () async {
+      sub = e.onDelete.listen(expectAsync((EventDeleteEvent ev) {
+        expect(ev, isNotNull, reason: 'event is passed');
+        expect(ev.event, equals(event),
+                                            reason: 'exception is the same');
+      }, count: 1, reason: 'event is fired'));
+      e.delete();
+    });
+  });
+}