为什么 Mockery 返回 demeter_getMyClass 而不是 MyClass？答案

【问题标题】：Why does Mockery return demeter_getMyClass instead of MyClass?为什么 Mockery 返回 demeter_getMyClass 而不是 MyClass？
【发布时间】：2017-06-30 13:50:23
【问题描述】：

我尝试模拟多个方法调用。如in the documentation 所述，测试以下方法调用：

$object->foo()->bar()->zebra()->alpha()->selfDestruct();

我们可以使用下面这段代码：

$mock = \Mockery::mock('CaptainsConsole');
$mock->shouldReceive('foo->bar->zebra->alpha->selfDestruct')->andReturn('Ten!');

所以，我实现了它：

public function testProcessPayment()
{
    $offerPayment =  m::mock('MyApp\Model\Entity\OfferPayment');

    $paymentTransaction = m::mock('MyApp\Model\Entity\PaymentTransaction');
    $paymentTransaction->shouldReceive('getOfferPayment->getOffer')->andReturn($offerPayment);

    $transactionManager = new TransactionManager();
    $transactionManager->processPayment($paymentTransaction);

    $this->assertInstanceOf('Offer', $paymentTransaction->getOfferPayment()->getOffer());
}

相关类：

class TransactionManager
{
    public function processPayment(PaymentTransaction $paymentTransaction) {
        $itemGroupEntity = $paymentTransaction->getOfferPayment()->getOffer();
    }
}

我明白了：

Return value of Mockery_3_MyApp_Model_Entity_PaymentTransaction::getOfferPayment() must be an instance of MyApp\Model\Entity\OfferPayment, instance of Mockery_4__demeter_getOfferPayment returned

getOfferPayment 和 getOffer 的实现：

public function getOfferPayment() : OfferPayment
{
    return $this->offerPayment;
}


public function getOffer() : Offer
{
    return $this->offer;
}

【问题讨论】：

标签： php unit-testing mocking mockery

【解决方案1】：

在这种情况下，Mockery 不支持return type declarations。该问题可以通过删除 getter 的返回类型声明来解决：

public function getOfferPayment()
{
    return $this->offerPayment;
}


public function getOffer()
{
    return $this->offer;
}

【讨论】：