在Laravel 中如何mock Trait

Trait是PHP 提供的一个代码复用方法。本文中将聊一聊如何mock 封装在Trait中的方法。

示例代码

trait SayHelloFormatter
{
    public function format($name)
    {
        return 'Hello '.$name.', this a test message';
    }
}

class Controller extends BaseController
{
    use SayHelloFormatter;

    public function sayHello($name){
        return $this->format($name);
    }
}

单元测试中Mock SayHelloFormatter

当没有对 SayHelloFormatter 中的 format 进行mock时：

public function testShouldReturnTestMessageWithTomWhenCallSayHelloGivenNameTom()
{
    $response = $this->get('/sayHello/tom');
    $response->assertStatus(200)->assertSee('Hello tom, this a test message');
}

当对 SayHelloFormatter 中的 format 进行mock时：

public function testShouldReturnMethodHasBeenMockedWhenCallSayHelloGivenNameTomAndUsingMockery()
{
    $mock = Mockery::mock(Controller::class)->makePartial();
    $mock->shouldReceive('format')->andReturn('This method has been mocked.');
    $this->app->instance(Controller::class, $mock);

    $response = $this->get('/sayHello/tom');

    $response->assertStatus(200)->assertSee('This method has been mocked.');
}