Hi, i recently updated to to newest coroutine vers...

# coroutines

[Thomas Kranzer]

Hi, i recently updated to to newest coroutine version (1.6.0) and i am now experiencing some strange behaviour when it comes to unit testing using turbine. While the following minimal example is working fine with the now deprecated TestCoroutineDispatcher, it fails (TimeoutCancellationException) with the new coroutines version and the UnconfinedTestDispatcher.. any ideas how this issue can be resolved?

// ViewModel
    val loading = MutableStateFlow(false)

    fun onReloadClicked() {
        viewModelScope.launch {
            loading.value = true
            // load data
            loading.value = false
        }
    }

// Test Code
    private val testDispatcher = UnconfinedTestDispatcher()    

    @Before
    fun setUp() {
        Dispatchers.setMain(testDispatcher)
    }    
    
    @After
    fun tearDown() {
        Dispatchers.resetMain()
    }

    @Test
    fun testLoading() = runTest(testDispatcher) {
        viewModel.loading.test {
            assertFalse(awaitItem())

            viewModel.onReloadClicked()

            assertTrue(awaitItem()) // fails with TimeoutCancellationException
            assertFalse(awaitItem())
        }
    }

[Dmitry Khalanskiy [JB]]

Please see https://github.com/cashapp/turbine/issues/42#issuecomment-1000317026. Looks like it has the same root cause, and the workaround may be applicable.