Example test with turbine

TurbineExampleTest.kt

@Test
fun `Given the ViewModel waits - When the event OnLaunch comes, then execute heavy computation with result`() =
    // 1.
    runTest {
        // ARRANGE
        val expectedString = "Result"
        // 2.
        heavyComputation.stub {
            onBlocking { doComputation() } doAnswer {expectedString}
        }
        val sut = ExampleViewModel(heavyComputation)
        
        // 3.
        sut.vmState.test {

            // ACTION
            sut.onEvent(VmEvents.OnLaunch)

            // CHECK
            // 4.
            assertEquals(VmState.Waiting, awaitItem())
            assertEquals(VmState.Running, awaitItem())
            assertEquals(VmState.Finished(expectedString), awaitItem())
            assertEquals(VmState.Waiting, awaitItem())
            
            // the test will finish on its own, because of lambda usage
        }
    }