在 Kotlin 中使用 Mockito doAnswer

Question

Kotlin 等价于这个 Java 代码是什么？

doAnswer(new Answer() {
    @Override
    public Object answer(InvocationOnMock invocation) throws Throwable {
        Design design = new Design();
        GetDesign.Listener callback = (GetDesign.Listener) invocation.getArguments()[0];
        callback.onSuccess(design);
        return null;
    }
}).when(someRepository).getDesign(any(GetDesign.Listener.class));

[更新] 在尝试了几个选项后，我终于使用 mockito-kotlin 让它工作了。我认为这是实施doAnswer最舒适的方式。语法几乎保持不变：

doAnswer {
    callback = it.arguments[0] as GetDesign.Listener
    callback.onSuccess(Design())
    null
}.whenever(someRepository).execute(any(GetDesign.Listener::class.java))

完整的代码和build.gradle配置可以在这里找到

Answer 1

doAnswer {
    val design = Design()
    val callback = it.arguments[0] as GetDesign.Listener
    callback.onSuccess(design)
    null // or you can type return@doAnswer null
}.`when`(someRepository).getDesign(any(GetDesign.Listener::class.java))

Answer 2

我是Full Mocking对象的粉丝，我不想加载任何配置或任何其他弹簧启动依赖注入。

如果我必须模拟JavaMailSender函数，我会这样做。我将使用 theAnswer 返回值。

Kotlin (Just test JavaMailSender(

@Test
fun javaMailSenderTest(){
val jms = mock(JavaMailSender::class.java)
val mimeMessage = mock(MimeMessage::class.java)
mimeMessage.setFrom("[e-mail]")
mimeMessage.setText("Just a body text")
Mockito.`when`(jms.send(mimeMessage)).thenAnswer {
  // val callback = it.arguments[0]  <- Use these expression to get params values
  // Since JavaMailSender::send() function retrun void therefore, we should return Unit
  Unit
}
assertEquals(jms.send(mimeMessage), Unit)

}

Kotlin (使用 Java MailSender 的自定义类(

您可能正在使用自己的自定义类来发送邮件，所以我在这里完成了。

@Test
fun updateMembers&SendEmailTest() {
val mockEmailService= mock(MyEmailServiceImplementor::class.java)
// sendInfoMail(true|false) is my custom implemention of JavaMailSender
Mockito.`when`(mockEmailService.sendInfoMail(true)).thenAnswer { invocation ->
  Unit
}
assertEquals(mockEmailService.sendInfoMail(true), Unit)

}

希望这对某人有所帮助。如果您需要Java版本，请在注释中告诉我

Answer 3

现在你也可以做这样的事情(假设类型是Repository(：

    mock<Repository>() {
        on { getDesign(any() as GetDesign.Listener) } doAnswer {
            val callback = it.arguments[0] as GetDesign.Listener
            callback.onSuccess(Design())
            null
        }
    }