Acceptance test like a pro

Tirando vantagem do Espresso e Android Studio para criar testes de aceitação incríveis

Transcript

1. Rodrigo Sicarelli Acceptance test like a pro Tirando vantagem do Espresso
2. Android Dev BR medium.com/android-dev-br androiddevbr.org +1100 membros
 Novo artigo toda semana
 Newsletter semanal Canal direto com GDE’s 
 Codehelp, feedbacks, learn etc etc etc
3. OpenMovie github.com/rsicarelli/openmovie
4. Acceptance tests
5. Acceptance tests
6. The sad truth
7. May the user be with you
8. Hermetic testing testdroid.com/tech/strive-for-hermetic-but-never-compromise-integrity-of-app
9. Hermetic testing
10. Hermetic testing semaphoreci.com/community/tutorials/how-to-deal-with-and-eliminate-flaky-tests
11. External dependencies Your code
12. Isolate all the external dependencies Your code
13. Create an fake environment!
14. Product flavors developer.android.com/intl/pt-br/tools/building/configuring-gradle
15. The “mock" flavor debug
 
 release prod mock android-developers.blogspot.com.br/2015/12/leveraging-product-flavors-in-android
16. The “mock" flavor codelabs.developers.google.com/codelabs/android-testing
17. Which one should I use? View Network
18. Which one should I use? View Network Injection medium.com/@patrykpoborca/making-a-best-practice-app-4-dagger-2-267ec5f6c89a#.iwom3rir5
19. Which one should I use? google.github.io/dagger
 
 blog.sqisland.com/2016/01/daggerless-di-testing
20. MovieClient @Override public void findMoviesByQuery(String query, Callback callback) {} @Override public void findMovieById(String id, Callback callback) {}
21. ClientModule @Module public class ClientModule { @Provides public MovieClient provideMovieClient() { return new MovieClient(); } }
22. Our Presenter public class Presenter { @Inject MovieClient client; }
23. Structure
24. Our prod flavor @Override public void findMoviesByQuery(String query, Callback callback) { //Calling the API; } @Override public void findMovieById(String id, Callback callback) { //Calling the API; }
25. Our mock flavor @Override public void findMoviesByQuery(String query, Callback callback) { //Return a fake json; } @Override public void findMovieById(String id, Callback callback) { //Return a fake json; }
26. Isolate all the external dependencies Your code
27. Not today, son.
28. Login screen play.google.com/store/apps/details?id=br.com.elo7.appbuyer
29. Login screen Is the Activity open? Can I perform some click? etc etc etc

30. In Espresso we trust developer.android.com/intl/pt-br/reference/android/app/Instrumentation
31. My activity is open? waitForActivity() and waitForActivityWithTimeout() developer.android.com/intl/pt-br/reference/android/app/Instrumentation.ActivityMonitor
32. Using the ActivityMonitor public void registerMonitor(Class<? extends Activity> activityClass) { if (monitor != null) { getInstrumentation().removeMonitor(monitor); } monitor = new Instrumentation.ActivityMonitor(activityClass.getName(), null, false); getInstrumentation().addMonitor(monitor); } @Test public void shouldTestSomething() { onView(withId(R.id.login)).perform(click()); monitor.waitForActivity(); onData(anything()) .inAdapterView(withId(R.id.product_grid_view)) .atPosition(0) .perform(click()); } public class BaseActivityTestCase extends ActivityTestCase {...}
33. Using the Monitor @Test public void shouldTestSomething() { onView(withId(R.id.login)).perform(click()); monitor.waitForActivity(); registerMonitor(OtherActivity.class); onData(anything()) .inAdapterView(withId(R.id.product_grid_view)) .atPosition(0) .perform(click()); monitor.waitForActivity();//new monitor! }
34. Searching while typing
35. In Espresso we trust! developer.android.com/intl/pt-br/reference/android/support/test/espresso/IdlingResource
36. Usage public final class SimpleCountingIdlingResource implements IdlingResource {…} public class EspressoIdlingResource { ... public static void busy() { simpleCountingIdlingResource.increment(); } public static void idle() { simpleCountingIdlingResource.decrement(); } ... }
37. Usage @Override public void findMoviesByQuery(String query, Callback callback) { EspressoIdlingResource.busy(); ... searchResponseCall.enqueue(... { @Override public void onResponse(...) { EspressoIdlingResource.idle(); } @Override public void onFailure(...) { EspressoIdlingResource.idle(); } }); }
38. Usage @Before private void registerIdlingResource() { Espresso.registerIdlingResources( rule.getActivity().getCountingIdlingResource()); } @After public void unregisterIdlingResource() { Espresso.unregisterIdlingResources( rule.getActivity().getCountingIdlingResource()); }
39. Oh yeah
40. Next steps Inject modules inside the tests Remove test code
41. Acceptance test like a pro Tirando vantagem do Espresso +RodrigoSicarelli2
 rodrigo.sicarelli@gmail.com github.com/rsicarelli/openmovie androiddevbr.org