@MockK or mockk()

Issue

When using the Mockk for Android Unit tests, there is any difference of using the notation when declaring dependencies?

class Test {
    private val x: X = mockk()

    private val test = TestClass(x)
...
}

or

class Test {
    @MockK
    private lateinit var x: X

    @InjectMockKs
    private lateinit var test: TestClass
    
    @Before
    fun setup() {
        MockKAnnotations.init(this)
    }
...
}

Solution

From MockK project

No there is no difference between the two implementations, they are equivalent.

Generally speaking, you can use mockk() when you need to declare mocks dynamically in your code, or if you need, for instance, just a single mock to have its unit functions relaxed (in which case you would build it with mockk(relaxUnitFun = true).

If your mocks have all the same behavior, you can use the annotations version.

Answered By - Canato