Scaffolding for testing incremental compilation.

dart/tests/try/web/sandbox.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;
+/// Helper library that creates an iframe sandbox for that can be used to load

[Johnni Winther, 2014/10/10 10:28:56]

'for that' -> 'that'.

[ahe, 2014/10/13 11:47:35]

Done.

+/// code.
+library trydart.test.sandbox;
 
 import 'dart:html';
 import 'dart:async';
 
 // TODO(ahe): Remove this import if issue 17936 is fixed.
 import 'dart:js' as hack;
 
-import 'package:async_helper/async_helper.dart';
+import 'package:expect/expect.dart' show
+    Expect;
+
+final Listener listener = new Listener();
 
 void onError(String message, String filename, int lineno, [int colno, error]) {
   if (filename != null && filename != "" && lineno != 0) {
     if (colno != null && colno != 0) {
       message = '$filename:$lineno:$colno $message';
     } else {
       message = '$filename:$lineno: $message';
     }
   }
   if (error != null) {
     // See:
     // https://mikewest.org/2013/08/debugging-runtime-errors-with-window-onerror
     var stack = error['stack'];
     if (stack != null) {
       message += '\n$stack';
     }
   }
-  message = "Error occurred in Try Dart iframe: $message";
+  message = "Error occurred in iframe: $message";
 
   // Synchronous, easier to read when running the browser manually.
   window.console.log(message);
 
   new Future(() {
     // Browsers ignore errors throw in event listeners (or from
     // window.onerror).
     throw message;
   });
 }
@@ skipping 12 matching lines @@
   // "iframe.contentWindow.addEventListener('error', ...)".  The former seems
   // to provide more details on both Chrome and Firefox (which provides no
   // information at all in error events).
   contentWindowProxy['onerror'] = onError;
 }
 
 void onIframeLoaded(Event event) {
   installErrorHandlerOn(event.target);
 }
 
-void main() {
-  document.cookie = 'org-trydart-AutomatedTest=true;path=/';
-  asyncStart();
-  window.onMessage.listen((MessageEvent e) {
-    switch (e.data) {
-      case '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();
-
-        asyncEnd();
-        break;
-
-      case 'dart-calling-main':
-      case 'dart-main-done':
-      case 'unittest-suite-done':
-      case 'unittest-suite-fail':
-      case 'unittest-suite-success':
-      case 'unittest-suite-wait-for-done':
-        break;
-
-      default:
-        throw 'Unexpected message: ${e.data}';
-    }
-  });
-
-  // Clearing localStorage makes Try Dart! think it is opening for the first
-  // time.
-  window.localStorage.clear();
-
+IFrameElement appendIFrame(String src, Element element) {
   IFrameElement iframe = new IFrameElement()
-      ..src = '/root_build/try_dartlang_org/index.html'
-      ..style.width = '90vw'
-      ..style.height = '90vh'
+      ..src = src
       ..onLoad.listen(onIframeLoaded);
-  document.body.append(iframe);
+  element.append(iframe);
   // Install an error handler both on the new iframe element, and when it has
   // fired the load event.  That seems to matter according to some sources on
   // stackoverflow.
   installErrorHandlerOn(iframe);
+  return iframe;
 }
+
+class Listener {
+  Completer completer;
+
+  String expectedMessage;
+
+  void onMessage(MessageEvent e) {
+    String message = e.data;
+    if (expectedMessage == message) {
+      completer.complete();
+    } else {
+      switch (message) {
+        case 'dart-calling-main':
+        case 'dart-main-done':
+        case 'unittest-suite-done':
+        case 'unittest-suite-fail':
+        case 'unittest-suite-success':
+        case 'unittest-suite-wait-for-done':
+          break;
+
+        default:
+          completer.completeError('Unexpected message: "$message".');
+      }
+    }
+  }
+
+  Future expect(data) {
+    if (data is String) {
+      Expect.isTrue(completer == null || completer.isCompleted);
+      expectedMessage = message;
+      completer = new Completer();
+      return completer.future;
+    } else if (data is Iterable) {
+      return Future.forEach(data, expect);
+    } else {
+      throw 'Unexpected data type: ${data.runtimeType}.';
+    }
+  }
+
+  void start() {
+    window.onMessage.listen(onMessage);
+  }
+}