Android Test-Driven Development by Tutorials by By Victoria Gonda & By Fernando Sproviero & By Lance Gleason
Author:By Victoria Gonda & By Fernando Sproviero & By Lance Gleason
Language: eng
Format: epub
Publisher: Ray Wenderlich
Testing for text
When the app is first launched, you expect to see the first joke. In this test, you’ll make sure there’s a view that displays that joke right away.
Add this test to your test class:
@Test fun onLaunchJokeIsDisplayed() { // 1 val joke = Joke( faker.idNumber().valid(), faker.lorem().sentence()) whenever(mockRepository.getJoke()) .thenReturn(Single.just(joke)) ActivityScenario.launch(MainActivity::class.java) // 2 onView(withId(R.id.textJoke)) .check(matches(withText(joke.joke))) }
This test is similar to the first test with some small but significant differences:
You’re keeping a reference to the Joke you’re creating to stub the repository. You want to know what the joke was later, to make sure it’s on the screen.
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