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fun loadText(textId: Long) {
    buildRequest<String>(
        path = "text/endpoint",
        params = {
            kv("id", textId)
        }
    ).execute {
        copy(text = it)
    }
}

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@Test
fun loadText() = TextViewModel::loadText {
    withParams(1)
    expectRequests {
        GET("text/endpoint?id=1") shouldReturn "server result"
    } expectState {
        copy(text = "server result")
    }
}

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@Test
fun setBold() = TextViewModel::setBold {
    sets {  ::options {  ::bold } }
}

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@Test
fun squared() = TestViewModel::squareNumber {
    setsMapped(2 to 4, 5 to 25) {  ::result }
}

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@Test
fun initialization() = testInitialization(
    expectRequests = {
        GET("text/endpoint")
    },
    expectState = {
        copy(text = Loading())
    }
)

elihart

class HappoTestActivity : IntegrationTestActivity() {
    override fun testCurrentScreen(
        mockProvider: MockedFragmentProvider,
        fragment: MvRxFragment,
        resetView: (onViewReset: (MvRxFragment) -> Unit) -> Unit,
        finishedTestingFragment: () -> Unit
    ) {
        happoViewSnapshotBuilder.snap(
            activity = this,
            component = mockProvider.fragmentName,

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class InteractionTestActivity : IntegrationTestActivity() {
    override fun testCurrentScreen(
        mockProvider: MockedFragmentProvider,
        fragment: MvRxFragment,
        resetView: (onViewReset: (MvRxFragment) -> Unit) -> Unit,
        finishedTestingFragment: () -> Unit
    ) {
        ActivityInteractionTester(
            activity = this,
            resetViewCallback = resetView,

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@Test
fun screenshotBookingFragment() = runScreenshots("com.airbnb.booking.BookingFragment")

@Test
fun screenshotSearchFragment() = runScreenshots("com.airbnb.search.SearchFragment")

fun runScreenshots(fragmentName: String) {
    val intent = IntegrationTestActivity.intent<HappoTestActivity>(
        context = InstrumentationRegistry.getInstrumentation().targetContext,
        fragmentName = fragmentName

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fun waitForLoopers(loopers: List<Looper>) {
    val idleDetectors = loopers.map { HandlerIdleDetector(Handler(it)) }
    while (idleDetectors.any {  !it.isIdle }) {
    }
}

class HandlerIdleDetector(val handler: Handler) {
    var isIdle = false

    init {

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val testContextMessage = "Error while testing 'Default State' mock for BookingFragment -> Clicking 'book_button' view on thread 'AsyncTask #1'"

throw IllegalStateException(testContextMessage, originalException)