Callable fake 是 Tim Macdonald 的一个 PHP 测试实用程序，它 “允许您伪造、捕获和断言对可调用 / 闭包的调用”，在某些情况下，此包可以帮助在测试中允许开发人员传递一个 callable。

它有一个受 Laravel 虚构启发的 API，如下所示：

1. // Before, you might collect callables to assert later...
2. public function testEachLoopsOverAllDependencies(): void
3. {
4. // arrange
5. $received = [];
6. $expected = factory(Dependency::class)->times(2)->create();
7. $repo = $this->app[DependencyRepository::class];
8. // act
9. $repo->each(function (Dependency $dependency) use (&$received): void {
10. $received[] = $dependency;
11. });
12. // assert
13. $this->assertCount(2, $received);
14. $this->assertTrue($expected[0]->is($received[0]));
15. $this->assertTrue($expected[1]->is($received[1]));
16. }

使用此软件包，您可以使用类似以下内容的内容：

1. public function testEachLoopsOverAllDependencies(): void
2. {
3. // arrange
4. $callable = new CallableFake();
5. $expected = factory(Dependency::class)->times(2)->create();
6. $repo = $this->app[DependencyRepository::class];
7. // act
8. $repo->each($callable);
9. // assert
10. $callable->assertTimesInvoked(2);
11. $callable->assertCalled(function (Depedency $dependency) use ($expected): bool {
12. return $dependency->is($expected[0]);
13. });
14. $callable->assertCalled(function (Dependency $dependency) use ($expected): bool {
15. return $dependency->is($expected[1]);
16. });
17. }

该包提供了诸如 assertCalled、assertNotCalled、assertInvoked 等断言，有关详细信息和示例，请务必查看项目自述文件中的可用 assertions 的完整列表。

你可以在 GitHub 上了解更多关于此软件包的信息，获取完整的安装说明，并在 timacdonald/callable-fake 上查看源代码。