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kotlinlang

Why does this test fail?
```    @Test
    fun testProduceState() {
        var inputState by mutableStateOf(true)
        rule.setContent {
            val outputState by produceState(initialValue = false, inputState) {
                value = async(Dispatchers.Default) {
                    delay(100)
                    !inputState
                }.await()
            }

            Text("$outputState")
        }

        rule.onNodeWithText("false").assertExists()
        inputState = false
        rule.onNodeWithText("true").assertExists()
    }```

It seems the test framework thinks the system is “idle” while produceState is still waiting for the computation.

I believe it’s because the test framework has no way to know what’s going on on the default dispatcher. As far as compose and even android/espresso are concerned, the main thread is idle. There happens to be some background thread that’s sleeping, but that’s not part of the idle criteria. 