Index: lib/build/test_compatibility.dart |
diff --git a/lib/build/test_compatibility.dart b/lib/build/test_compatibility.dart |
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+// Copyright (c) 2015, 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. |
+ |
+/// Some Transformers to maintain compatibility with the new `test` package, |
+/// since it doesn't use normal dart script tags in html. We get around this by |
+/// using two transformers: |
+/// - A transformer to convert <lint rel="x-dart-test"> intro dart script tags |
+/// so that they can be processed by the rest of the transformers normally. |
+/// - A second transformer to convert the output back, so that the `test` |
+/// package can find a <link rel="x-dart-test"> tag after all the |
+/// transformations are done. |
+library web_components.build.test_compatability.dart; |
+ |
+import 'dart:async'; |
+import 'package:barback/barback.dart'; |
+import 'package:html/dom.dart'; |
+import 'package:html/parser.dart'; |
+ |
+/// The name of the attribute that will be added to script tags that started out |
+/// as <link rel="x-dart-test"> tags. |
+const testAttribute = '_was_test'; |
+ |
+/// The first transformer that should be ran, this does a query selector for |
+/// link[rel="x-dart-test"] and changes them to a normal dart script tag with a |
+/// special `_was_test` attribute so we know to change it back later on. |
+class RewriteXDartTestToScript extends _EntryPointOnlyTransformer { |
+ RewriteXDartTestToScript(List<String> entryPoints) : super(entryPoints); |
+ |
+ Future apply(Transform transform) { |
+ return transform.primaryInput.readAsString().then((String html) { |
+ var doc = parse(html); |
+ for (var tag in doc.querySelectorAll('link[rel="x-dart-test"]')) { |
+ tag.replaceWith(new Element.tag('script') |
+ ..attributes['type'] = 'application/dart' |
+ ..attributes['src'] = tag.attributes['href'] |
+ ..attributes[testAttribute] = ''); |
+ } |
+ transform.addOutput( |
+ new Asset.fromString(transform.primaryInput.id, doc.outerHtml)); |
+ }); |
+ } |
+} |
+ |
+/// The last transformer that should be ran, this does a query selector for |
+/// `script[type="application/dart"][_was_test]` and changes matching elements |
+/// back to `<link rel="x-dart-test">` tags. |
+class RewriteScriptToXDartTest extends _EntryPointOnlyTransformer { |
+ RewriteScriptToXDartTest(List<String> entryPoints) : super(entryPoints); |
+ |
+ Future apply(Transform transform) { |
+ return transform.primaryInput.readAsString().then((String html) { |
+ var doc = parse(html); |
+ var scripts = doc.querySelectorAll( |
+ 'script[type="application/dart"][$testAttribute]'); |
+ for (var tag in scripts) { |
+ tag.replaceWith(new Element.tag('link') |
+ ..attributes['rel'] = 'x-dart-test' |
+ ..attributes['href'] = tag.attributes['src']); |
+ } |
+ transform.addOutput( |
+ new Asset.fromString(transform.primaryInput.id, doc.outerHtml)); |
+ }); |
+ } |
+} |
+ |
+/// Internal base class to encapsulate the isPrimary logic. |
+abstract class _EntryPointOnlyTransformer extends Transformer { |
+ final List<String> entryPoints; |
+ |
+ _EntryPointOnlyTransformer(this.entryPoints) : super(); |
+ |
+ bool isPrimary(AssetId id) { |
+ if (!id.path.startsWith('test/')) return false; |
+ if (entryPoints != null) return entryPoints.contains(id.path); |
+ // If no entry point is supplied, then any html file is an entry point. |
+ return id.path.endsWith('.html'); |
+ } |
+} |