| // Copyright (c) 2013, 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 barback.test.transformer.check_content_and_rename; |
| |
| import 'dart:async'; |
| |
| import 'package:barback/barback.dart'; |
| |
| import 'mock.dart'; |
| |
| /// A transformer that checks the extension and content of an asset, then |
| /// produces a new asset with a new extension and new content. |
| class CheckContentAndRenameTransformer extends MockTransformer { |
| final String oldExtension; |
| final String oldContent; |
| final String newExtension; |
| final String newContent; |
| |
| CheckContentAndRenameTransformer(this.oldExtension, this.oldContent, |
| this.newExtension, this.newContent); |
| |
| Future<bool> doIsPrimary(Asset asset) { |
| if (asset.id.extension != '.$oldExtension') return new Future.value(false); |
| return asset.readAsString().then((value) => value == oldContent); |
| } |
| |
| Future doApply(Transform transform) { |
| return getPrimary(transform).then((input) { |
| transform.addOutput(new Asset.fromString( |
| input.id.changeExtension('.$newExtension'), newContent)); |
| }); |
| } |
| } |