Scaffolding for testing incremental compilation.

dart/tests/try/web/incremental_compilation_update_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.
+
+library trydart.incremental_compilation_update_test;
+
+import 'dart:html';
+
+import 'dart:async' show
+    Future;
+
+import 'package:async_helper/async_helper.dart' show
+    asyncTest;
+
+import 'sandbox.dart' show
+    appendIFrame,
+    listener;
+
+import 'web_compiler_test_case.dart' show
+    WebCompilerTestCase;
+
+void main() => asyncTest(() {
+  listener.start();
+
+  IFrameElement iframe =
+      appendIFrame(
+          '/root_dart/tests/try/web/incremental_compilation_update.html',
+          document.body)
+          ..style.width = '90vw'
+          ..style.height = '90vh';
+
+  return listener.expect('iframe-ready').then((_) {
+    Future<String> future =
+        new WebCompilerTestCase("main() { print('Hello, World!'); }").run();
+    return future.then((String jsCode) {
+        var objectUrl =
+            Url.createObjectUrl(new Blob([jsCode], 'application/javascript'));
+
+        iframe.contentWindow.postMessage(['add-script', objectUrl], '*');
+        return listener.expect(['Hello, World!', 'iframe-dart-main-done']).then(
+            (_) {
+              // TODO(ahe): Add incremental compilation here.
+            });
+    });
+  }).then((_) {
+    // Remove the iframe to work around a bug in test.dart.
+    iframe.remove();
+  });
+});