CODEWITHSUNDEEP
androidunit-testingkotlinmockito
aloj
aloj

Reputation: 3242

Mock object in Android Unit test with kotlin - any() gives null

I'm trying to test my classes and I need to mock a static class. My code is the following:

PowerMockito.mockStatic(ToolTipUtil::class.java)
PowerMockito.`when`(ToolTipUtil.wasToolTipShown(any(Context::class.java), "")).thenReturn(true)
val context = mock(Context::class.java)
presenter.onResume(context)
verify(view).setMenuButtonShown(eq(false))

But in the second line it throws an error:

"java.lang.IllegalStateException: any(Context::class.java) must not be null"

I've tried with mockito-kotlin and befriending-kotlin-and-mockito with no exit. Do you know how to fix it?

Upvotes: 21

Views: 14922

Answers (3)

TpoM6oH
TpoM6oH

Reputation: 8585

Mockito often returns null when you call any() and that breaks kotlin's not null parameters.

In mockito-kotlin they have a separate function for it, called anyOrNull().

You can also create your own function, here they say that this should also work.

/**
 * Returns Mockito.any() as nullable type to avoid java.lang.IllegalStateException when
 * null is returned.
 */
fun <T> any(): T = Mockito.any<T>()

Upvotes: 40

Amrita
Amrita

Reputation: 465

Add the following code in your test class:

private fun <T> any(type : Class<T>): T {
    Mockito.any(type)
    return uninitialized()
}

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

Upvotes: 5

Hemant Parmar
Hemant Parmar

Reputation: 3976

When calling mock(), you don't have to pass in the class instance anymore. If the type can be inferred, you can just write:

val mock : MyClass = mock()

If the type cannot be inferred directly, use:

val mock = mock<MyClass>()

Hope it will help you!!

Upvotes: -1

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