| // 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. |
| |
| import "dart:io"; |
| |
| const sampleText = "Sample text file."; |
| |
| main() async { |
| var file = await createFile(); |
| var uri = new Uri.file(file.path); |
| |
| var resource = new Resource(uri.toString()); |
| |
| if (resource.uri != uri) { |
| throw "Incorrect URI: ${resource.uri}"; |
| } |
| |
| var text = await resource.readAsString(); |
| if (text != sampleText) { |
| throw "Incorrect reading of text file: $text"; |
| } |
| |
| var bytes = await resource.readAsBytes(); |
| if (!compareBytes(bytes, sampleText.codeUnits)) { |
| throw "Incorrect reading of bytes: $bytes"; |
| } |
| |
| var streamBytes = []; |
| await for (var byteSlice in resource.openRead()) { |
| streamBytes.addAll(byteSlice); |
| } |
| if (!compareBytes(streamBytes, sampleText.codeUnits)) { |
| throw "Incorrect reading of bytes: $bytes"; |
| } |
| |
| await deleteFile(file); |
| } |
| |
| /// Checks that [bytes] and [expectedBytes] have the same contents. |
| bool compareBytes(bytes, expectedBytes) { |
| if (bytes.length != expectedBytes.length) return false; |
| for (int i = 0; i < expectedBytes.length; i++) { |
| if (bytes[i] != expectedBytes[i]) return false; |
| } |
| return true; |
| } |
| |
| createFile() async { |
| var tempDir = await Directory.systemTemp.createTemp("sample"); |
| var filePath = tempDir.path + Platform.pathSeparator + "sample.txt"; |
| var file = new File(filePath); |
| await file.create(); |
| await file.writeAsString(sampleText); |
| return file; |
| } |
| |
| deleteFile(File file) async { |
| // Removes the file and the temporary directory it's in. |
| var parentDir = new Directory(file.path.substring(0, |
| file.path.lastIndexOf(Platform.pathSeparator))); |
| await parentDir.delete(recursive: true); |
| } |