ExamplePresenterTest.kt

@RunWith(MockitoJUnitRunner::class)
class ExamplePresenterTest {

	@Mock
	private lateinit var view: ExampleContract.View

	@Spy
	private var presenter: ExamplePresenter = ExamplePresenter()

	
	@Before
	fun setUp() {
		presenter.attach(view)
	}

	@Test
	fun `test_fetchProfileName_calles_onProfileNameReceived_on_positive_response`() {
		
		Mockito.`when`(presenter.fetchProfileNameFromRepository()))
			.thenReturn("Gil Goldzweig")
		
		presenter.fetchProfileName() 
		
		Mockito.verify(view, times(1)) 
			.onProfileNameReceived("Gil Goldzweig")
	}

	@Test
	fun `test_fetchProfileName_calles_onProfileRequestFailed_on_exception`() {
		
		val fakeException = Mockito.mock(IOException::class.java)
		
		Mockito.`when`(presenter.fetchProfileNameFromRepository())) 
			.thenThrow(fakeException)
		
		presenter.fetchProfileName() 
		
		Mockito.verify(view, times(1)) 
			.onProfileNameRequestFailed(fakeException)
	}
}