Hey I am testing Live Data value. When I am mocking it giving me null pointer expection. ```internal...

# mockk

[Vivek Modi]

Hey I am testing Live Data value. When I am mocking it giving me null pointer expection.

internal fun handleDataResponse() {
        dataLiveData.postValue(true)
        currentDeviceTypeLiveData.postValue(true)
}

test

@Test
fun `handleDataResponse - Handle connection success `() {
    // STUBBING
    // EXECUTION
    viewModel.handleDataResponse()
    // VERIFICATION
    assertEquals(true, viewModel.dataLiveData.value)
    assertEquals(true, viewModel.currentDeviceTypeLiveData.value)
}

[Vivek Modi]

Expected : true
Actual   :null

[Nikita Voloshin]

It would be better if you provide complete example including mock creation and stubbing.
But anyway, if you want your mocked objects to behave as original objects you should either use spyk or stub method call with callOriginal() . Otherwise, mock will either fail or return null based on whether it is relaxed or not.
So, make sure your stubbing block contains at least this:

every { viewModel.dataLiveData.postValue(any()) } answers { callOriginal() }

Then, based on your mock creation logic you might need to also stub viewModel.dataLiveData itself in order to stub get/set for live data