ClockViewModelTest.kt

@Test
fun `60 seconds clock`() = coroutineRule.testDispatcher.runBlockingTest {
    whenever(observeState.invoke()).thenReturn(flowOf(State.Pomodoro(60)))

    viewModel = ClockViewModel(
        observeState = observeState,
        nextState = nextState,
        errorChannel = errorChannel,
        defaultDispatcher = coroutineRule.testDispatcher
    )

    viewModel.viewState.observeForTesting {
        assertThat(viewModel.viewState.value?.clock).isEqualTo("1:00")
    }
}