电子邮件模拟失败

Question

我试图模拟发送电子邮件功能，该功能在特定工作/任务完成时发送电子邮件。当我尝试对它进行单元测试时，它会低于错误。这是测试它的正确方法还是错误或遗漏了任何东西。

@Mock
private MailServiceImpl mailService;
@Mock
private JavaMailSenderImpl javaMailSender;

@Before
public  void setUp() {
    MockitoAnnotations.initMocks(this);
    mailService=new MailServiceImpl(javaMailSender);
}

@Test
public void testSendEmail() {
    try {
        doNothing().when(mailService).sendMail(getEmailProperties());
        mailService.sendMail(getEmailProperties()); 
        verify(mailService,times(1)).sendMail(getEmailProperties());
    } catch (Exception e) {
        Assert.fail(e.getMessage());
    }
}
public EmailProperties getEmailProperties() {
    EmailProperties emailProperties = new EmailProperties();
    emailProperties.setFromAddress("[e-mail]");
    emailProperties.setToAddress("[e-mail]");
    emailProperties.setEmailBody("Test");
    emailProperties.setSubject("Test email");
    emailProperties.setAttachment((File) null);
    emailProperties.setMessageType(1);
    return emailProperties;
  }

下面是从testSendEmail方法抛出的错误消息。任何建议或任何其他测试方法。谷歌搜索并没有多大帮助。

java.lang.AssertionError: 
    Argument passed to when() is not a mock!
    Example of correct stubbing:
    doThrow(new RuntimeException()).when(mock).someMethod();
    at org.junit.Assert.fail(Assert.java:88)
    at com.xx.xx.xx.mail.MailServiceTest.testSendEmail(MailServiceTest.java:52)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)

Answer 1

错误消息试图说Mockito.when()方法只接受模拟/监视的对象。

您在when方法中使用mailService这是错误的，因为它既不是模拟对象也不是监视对象。

mailService=new MailServiceImpl(javaMailSender);

我不能详细介绍，因为没有提供正在测试的代码。

但是您可以尝试更换
mailService=new MailServiceImpl(javaMailSender); 跟 mailService=Mockito.spy(new MailServiceImpl(javaMailSender));

这应该让你mailService成为嘲笑者会接受的东西。

Answer 2

删除doNothing((.when(mailService(.sendMail(getEmailProperties(((;修复了此问题。不确定导致此问题的原因