Question

当我测试Mocked外部调用时，我没有看到报告的模拟值而是Null并且我的测试失败了。我可以在Test Class中看到Mocked值（报告）但不在BusinessServiceImpl类中看到，而Application（Method Return）不会像我预期的那样被修改。

我的期望：当我在Impl类中模拟外部调用时，模拟值应该在那里可用，并且其他一切都会发生，好像调用了真正的方法来完成单元测试。

实施代码：

package com.core.business.service.dp.fulfillment;

import com.core.business.service.dp.payment.PaymentBusinessService;

public class BusinessServiceImpl implements BusinessService { // Actual Impl Class
    private PaymentBusinessService paymentBusinessService = PluginSystem.INSTANCE.getPluginInjector().getInstance(PaymentBusinessService.class);

    @Transactional( rollbackOn = Throwable.class)
    public Application  applicationValidation (final Deal deal) throws BasePersistenceException {
        Application application = (Application) ApplicationDTOFactory.eINSTANCE.createApplication();
        //External Call we want to Mock
        String report = paymentBusinessService.checkForCreditCardReport(deal.getId());
        if (report != null) {
            application.settingSomething(true); //report is Null and hence not reaching here
        }
        return application;
    }
}

测试代码：

@Test(enabled = true)// Test Class
public void testReCalculatePrepaids() throws Exception {
    PaymentBusinessService paymentBusinessService = mock(PaymentBusinessService.class);
    //Mocking External Call
    when(paymentBusinessService.checkForCreditCardReport(this.deal.getId())).thenReturn(new String ("Decline by only Me"));
    String report = paymentBusinessService.checkForCreditCardReport(this.deal.getId());
    // Mocked value of report available here
    //Calling Impl Class whose one external call is mocked
    //Application is not modified as expected since report is Null in Impl class
    Application sc = BusinessService.applicationValidation(this.deal);
}

Answer 1

Mockito的主要目的是隔离测试。在测试你的BusinessServiceImpl时，你应该模拟它的所有依赖项。

这正是您尝试使用上面的示例所做的。现在要使 mocking 工作，必须将模拟对象注入到您要测试的类中，在本例中为BusinessServiceImpl。

这样做的一种方法是通过类的构造函数dependency injection传递dependecy。或者您可以查看如何使用Spring and ReflectionTestUtils.

完成

Answer 2

我完成了它并且我成功地获得了Mocked值而根本没有触及BusinessServiceImpl类。我遵循的步骤是： 1. @Mock PaymentBusinessService paymentBusinessService = mock（PaymentBusinessService.class）; 2. @InjectMocks private PaymentBusinessService paymentBusinessService = PluginSystem.INSTANCE.getPluginInjector（）。getInstance（PaymentBusinessService.class）;

然后简单地运行上面的测试，我可以在BusinessServiceImpl中看到报告的值为“仅由我拒绝”并且我的测试用例已通过

外部Mocked方法在实际类中返回Null

2 个答案: