mockito - 在 Kotlin 函数上使用 Mokito anyObject() 时，指定为非 null 的参数为 null

Question

我的代码如下，引用https://stackoverflow.com/a/30308199/3286489中的解决方案

import org.mockito.Mock
import org.mockito.Mockito
import org.mockito.MockitoAnnotations
import org.mockito.Mockito.*

class SimpleClassTest {

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

    private fun <T> uninitialized(): T = null as T
    lateinit var simpleObject: SimpleClass
    @Mock lateinit var injectedObject: InjectedClass


    @Before
    fun setUp() {
        MockitoAnnotations.initMocks(this)
    }

    @Test
    fun testSimpleFunction() {
        simpleObject = SimpleClass(injectedObject)

        verify(injectedObject).settingDependentObject(anyObject())

    }
}

我仍然有以下错误

java.lang.IllegalArgumentException: Parameter specified as non-null is null: method my.package.InjectedClass.settingDependentObject, parameter dependentObject

我错过了什么吗？

更新下面是经过测试的代码(最简单的形式和工作)

class SimpleClass(val injectedClass: InjectedClass) {

    fun simpleFunction() {
        injectedClass.settingDependentObject(DependentClass(Response.Builder().build()))
    }
}

open class DependentClass(response: Response) {

}

open class InjectedClass() {
    lateinit var dependentObject: DependentClass

    fun settingDependentObject(dependentObject: DependentClass) {
        this.dependentObject = dependentObject
    }
}

Answer 1

默认情况下 Kotlin classes and members are final 。模拟cannot mock final classes or methods .因此，当您编写时:

verify(injectedObject).settingDependentObject(anyObject())

调用真正的实现，它需要非空参数。

要解决此问题，请打开您的类和方法，或者更好的是，更改 SimpleClass 以接受接口(interface)作为其构造函数参数并改为模拟接口(interface)。