可以在Kotlin中使用Mockito吗？ [英] Is it possible to use Mockito in Kotlin?

问题描述

我遇到的问题是 Matchers.anyObject（）返回 null 。当用于仅接受非可空类型的mock方法时，它会导致抛出不应为null异常。

The problem I'm facing is that Matchers.anyObject() returns null. When used to mock method that only accepts non-nullable types it causes a "Should not be null" exception to be thrown.

`when`(mockedBackend.login(anyObject())).thenAnswer { invocationOnMock -> someResponse }

模拟方法：

public open fun login(userCredentials: UserCredentials): Response

推荐答案

有两种可能的解决方法：

There are two possible workarounds:

private fun <T> anyObject(): T {
    Mockito.anyObject<T>()
    return uninitialized()
}

private fun <T> uninitialized(): T = null as T

@Test
fun myTest() {
    `when`(mockedBackend).login(anyObject())).thenAnswer { ... }
}

另一种解决方法是

private fun <T> anyObject(): T {
    return Mockito.anyObject<T>()
}

@Test
fun myTest() {
    `when`(mockedBackend).login(anyObject())).thenAnswer { ... }
}

这是关于此的更多讨论主题，首先建议解决方法。

Here is some more discussion on this topic, where the workaround is first suggested.

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