| // 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}) { |
| assert(oldExtension != null); |
| assert(oldContent != null); |
| assert(newExtension != null); |
| assert(newContent != null); |
| } |
| |
| bool doIsPrimary(AssetId id) => id.extension == '.$oldExtension'; |
| |
| Future doApply(Transform transform) { |
| return getPrimary(transform).then((input) { |
| return input.readAsString().then((contents) { |
| if (contents != oldContent) return; |
| |
| transform.addOutput(new Asset.fromString( |
| input.id.changeExtension('.$newExtension'), newContent)); |
| }); |
| }); |
| } |
| } |