Test-Driven Development in Android

Jan 24 2023 Kotlin 1.6, Android 12, AS Bumblebee 2021.1.1

Part 3: Test-Driven Development: UI Tests

17. Create UI Tests

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This video Create UI Tests was last updated on Jan 24 2023

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Our joke app needs to have a button thats makes a new joke appear each time it is clicked right? so, thats what we want to verify with our first test.

@Test
fun onLaunchButtonIsDisplayed(){

}
declareMock<Repository> {
      whenever(getJoke())
          .thenReturn(Single.just(Joke(
              faker.idNumber().valid(),
              faker.lorem().sentence())))
}
ActivityScenario.launch(MainActivity::class.java)
onView(withId(R.id.buttonNewJoke))
    .check(matches(isDisplayed()))