describe("my class I am testing") {

        val repo = mock()
        val view = mock()
        val presenter = Presenter(repo, view, ImmediateSchedulerProvider())

        context("when there is nothing to show") {
            val emptyListObservable: Observable<List<Item>> = Observable.just(emptyList())

            whenever(repo.getItems()).thenReturn(emptyListObservable)

            it("should show the empty view.") {
                presenter.getItems()
                verify(view).showEmptyView()
                verify(view, never()).hideEmptyView()
                verify(view, never()).showItems(any())
            }
        }

        context("when we have one item to show") {
            val singleItemListObservable: Observable<List<Item>> = Observable.just(listOf(Item("Item 1")))

            whenever(repo.getItems()).thenReturn(singleItemListObservable)

            it("should show the item.") {
                presenter.getItems()
                verify(view).hideEmptyView()
                verify(view).showItems(any())
                verify(view, never()).showEmptyView()
            }

        }
    }

it

beforeEach

context

java.lang.IllegalArgumentException: Unable to determine method-name from description=it The flags should be set to newTask, noHistory, excludeFromRecents(given You are retrieving the Settings Intent); - ignored

org.powermock.api.mockito.internal.exceptions.StackTraceCleanerProvider$1.isIn(Ljava/lang/StackTraceElement;)Z

java.lang.AbstractMethodError: org.powermock.api.mockito.internal.exceptions.StackTraceCleanerProvider$1.isIn(Ljava/lang/StackTraceElement;)Z

@RunWith(PowerMockRunner::class)
@PowerMockRunnerDelegate(JUnitPlatform::class)

@PrepareForTest(Camera::class, CameraParameterHandler::class)
class CameraUtilsUnitTest : Spek({
    describe("When retrieving the back camera") {
        given("A phone with no camera") {
            beforeEach {
                PowerMockito.mockStatic(Camera::class.java)
                `when`(Camera.getNumberOfCameras()).thenReturn(0)
            }

            it("Should return null") {
                val camera = getBackFacingCamera()
                assertThat(camera, `is`(nullValue()))
            }
        }
}

PowerMock.mockStatic

PowerMock.mock

when

‘when'

Failed to start: 173 passed, 64 not started

fdescribe