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| 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 /// Helper library that creates an iframe sandbox that can be used to load | |
| 6 /// code. | |
| 7 library trydart.test.sandbox; | |
| 8 | |
| 9 import 'dart:html'; | |
| 10 import 'dart:async'; | |
| 11 | |
| 12 // TODO(ahe): Remove this import if issue 17936 is fixed. | |
| 13 import 'dart:js' as hack; | |
| 14 | |
| 15 import 'package:expect/expect.dart' show | |
| 16 Expect; | |
| 17 | |
| 18 final Listener listener = new Listener(); | |
| 19 | |
| 20 void onError(String message, String filename, int lineno, [int colno, error]) { | |
| 21 if (filename != null && filename != "" && lineno != 0) { | |
| 22 if (colno != null && colno != 0) { | |
| 23 message = '$filename:$lineno:$colno $message'; | |
| 24 } else { | |
| 25 message = '$filename:$lineno: $message'; | |
| 26 } | |
| 27 } | |
| 28 if (error != null) { | |
| 29 // See: | |
| 30 // https://mikewest.org/2013/08/debugging-runtime-errors-with-window-onerror | |
| 31 var stack = error['stack']; | |
| 32 if (stack != null) { | |
| 33 message += '\n$stack'; | |
| 34 } | |
| 35 } | |
| 36 message = "Error occurred in iframe: $message"; | |
| 37 | |
| 38 // Synchronous, easier to read when running the browser manually. | |
| 39 window.console.log(message); | |
| 40 | |
| 41 new Future(() { | |
| 42 // Browsers ignore errors throw in event listeners (or from | |
| 43 // window.onerror). | |
| 44 throw message; | |
| 45 }); | |
| 46 } | |
| 47 | |
| 48 void installErrorHandlerOn(IFrameElement iframe) { | |
| 49 // This method uses dart:js to install an error event handler on the content | |
| 50 // window of [iframe]. This is a workaround for http://dartbug.com/17936. | |
| 51 var iframeProxy = new hack.JsObject.fromBrowserObject(iframe); | |
| 52 var contentWindowProxy = iframeProxy['contentWindow']; | |
| 53 if (contentWindowProxy == null) { | |
| 54 print('No contentWindow in iframe'); | |
| 55 throw 'No contentWindow in iframe'; | |
| 56 } | |
| 57 | |
| 58 // Note: we have two options, use "iframe.contentWindow.onerror = ..." or | |
| 59 // "iframe.contentWindow.addEventListener('error', ...)". The former seems | |
| 60 // to provide more details on both Chrome and Firefox (which provides no | |
| 61 // information at all in error events). | |
| 62 contentWindowProxy['onerror'] = onError; | |
| 63 } | |
| 64 | |
| 65 void onIframeLoaded(Event event) { | |
| 66 installErrorHandlerOn(event.target); | |
| 67 } | |
| 68 | |
| 69 IFrameElement appendIFrame(String src, Element element) { | |
| 70 IFrameElement iframe = new IFrameElement() | |
| 71 ..src = src | |
| 72 ..onLoad.listen(onIframeLoaded); | |
| 73 element.append(iframe); | |
| 74 // Install an error handler both on the new iframe element, and when it has | |
| 75 // fired the load event. That seems to matter according to some sources on | |
| 76 // stackoverflow. | |
| 77 installErrorHandlerOn(iframe); | |
| 78 return iframe; | |
| 79 } | |
| 80 | |
| 81 class Listener { | |
| 82 Completer completer; | |
| 83 | |
| 84 String expectedMessage; | |
| 85 | |
| 86 Stopwatch wallclock; | |
| 87 | |
| 88 int get elapsed => wallclock.elapsedMilliseconds ~/ 1000; | |
| 89 | |
| 90 void onMessage(MessageEvent e) { | |
| 91 String message = e.data; | |
| 92 if (expectedMessage == message) { | |
| 93 completer.complete(); | |
| 94 } else { | |
| 95 switch (message) { | |
| 96 case 'dart-calling-main': | |
| 97 case 'dart-main-done': | |
| 98 case 'unittest-suite-done': | |
| 99 case 'unittest-suite-fail': | |
| 100 case 'unittest-suite-success': | |
| 101 case 'unittest-suite-wait-for-done': | |
| 102 break; | |
| 103 | |
| 104 default: | |
| 105 completer.completeError( | |
| 106 'Unexpected message: "$message" (expected "$expectedMessage").'); | |
| 107 } | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 Future expect(data) { | |
| 112 if (data is String) { | |
| 113 Expect.isTrue(completer == null || completer.isCompleted); | |
| 114 expectedMessage = data; | |
| 115 completer = new Completer(); | |
| 116 return completer.future; | |
| 117 } else if (data is Iterable) { | |
| 118 return Future.forEach(data, expect); | |
| 119 } else { | |
| 120 throw 'Unexpected data type: ${data.runtimeType}.'; | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 void start() { | |
| 125 wallclock = new Stopwatch()..start(); | |
| 126 window.onMessage.listen(onMessage); | |
| 127 } | |
| 128 } | |
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