Try Dart! end-to-end test.

dart/tests/try/end_to_end_test.dart

+// Copyright (c) 2014, 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.
+
+/// Whitebox integration/end-to-end test of Try Dart! site.
+///
+/// This test opens Try Dart! in an iframe.  When opened the first time, Try
+/// Dart! will display a simple hello-world example, color tokens, compile the
+/// example, and run the result.  We've instrumented Try Dart! to use
+/// window.parent.postMessage when the running program prints anything. So this
+/// test just waits for a "Hello, World!" message.
+library trydart.end_to_end_test;
+
+import 'dart:html';
+import 'dart:async';
+
+import 'package:async_helper/async_helper.dart';
+
+void main() {
+  asyncStart();
+  window.onMessage.listen((MessageEvent e) {
+    if (e.data == 'Hello, World!\n') {
+      // Clear the DOM to work around a bug in test.dart.
+      document.body.nodes.clear();
+
+      // Clean up after ourselves.
+      window.localStorage.clear();
+
+      asyncSuccess(null);
+    } else {
+      window.console.dir(e.data);
+    }
+  });
+
+  // Clearing localStorage makes Try Dart! think it is opening for the first
+  // time.
+  window.localStorage.clear();
+
+  document.body.append(new IFrameElement()
+      ..src = '/root_build/try_dartlang_org/index.html'
+      ..style.width = '90vw'
+      ..style.height = '90vh');
+}