| // 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. |
| |
| import 'dart:io'; |
| |
| /// A function that takes a file path and returns the last modified time for |
| /// the file at that path. |
| typedef MockTimeCallback = DateTime? Function(String path); |
| |
| MockTimeCallback? _mockTimeCallback; |
| |
| /// Overrides the default behavior for accessing a file's modification time |
| /// with [callback]. |
| /// |
| /// The OS file modification time has pretty rough granularity (like a few |
| /// seconds) which can make for slow tests that rely on modtime. This lets you |
| /// replace it with something you control. |
| void mockGetModificationTime(MockTimeCallback callback) { |
| _mockTimeCallback = callback; |
| } |
| |
| /// Gets the modification time for the file at [path]. |
| /// Completes with `null` if the file does not exist. |
| Future<DateTime?> modificationTime(String path) async { |
| var mockTimeCallback = _mockTimeCallback; |
| if (mockTimeCallback != null) { |
| return mockTimeCallback(path); |
| } |
| |
| final stat = await FileStat.stat(path); |
| if (stat.type == FileSystemEntityType.notFound) return null; |
| return stat.modified; |
| } |