FlowTestScenario Assertions

Use FlowTestScenario to drive NavFlow without UI.

@Test
fun contacts_shows_details() = runTest {
    val factory = SimpleNavFlowFactory<ContactsFlowEvent> {
        ContactsNavFlow(fakeRepository, appScope = this)
    }

    factory.createTestScenario(this)
        .start()
        .send(ContactsEvent.Select(ContactId("1")))
        .awaitStackTags("ContactsList", "ContactDetails")
        .assertNoMoreOutputs()
        .finish()
}

Helpers:

• start() wires outputs and calls NavFlow.start().
• send(event) injects events into the top node.
• awaitTopNodeIs<T>(), awaitStackTags, awaitStackSize synchronise tests with navigation.
• awaitOutputOfType<T>() waits for outputs emitted after the call begins.
• launchScript(onTrace = …) lets you reuse production scripts inside the same scenario.