[Android]Jetpack for test related environments

I’ve bet Truth since [Android]Checking Android Testing Support Library 1.0. I encountered an issue using AssertJ with ATSL 1.x and I talked about it in https://www.slideshare.net/KazuMatsu/20171215-andoirdtestnight before.

In a talk https://www.youtube.com/watch?v=wYMIadv9iF8 , Google starts to provide Jetpack. The pack has various libraries and test related libraries as well. For example, Espresso.

What I surprised is Truth Android extension. They announced the extension will be bundled in the pack. It means they will bundle Truth as an assertion library for Android. For me, the news was very good opportunity since it shows my prediction was a success.

Robolectric 4.0, Nitrogen and AndroidTestOrchestration were also interested.

We can see an announcement of Robolectric in http://robolectric.org/blog/2018/05/09/robolectric-4-0-alpha/ . According to the release note, we can implement test code like instrumented tests but can handle it via Robolectric. In the video, we can hear running test in no emulator environment and I predicted it was this feature. Recent years, Googlers have committed to Robolectric heard and I also thought it would integrate to one of the testing libraries.

@RunWith(AndroidJUnit4::class)
class OnDeviceTest {
  @get:Rule val rule = ActivityTestRule(NoteListActivity::class.java)

  @Test fun clickingOnTitle_shouldLaunchEditAction() {
    onView(withId(R.id.button)).perform(click())
    intended(hasAction(equalTo("android.intent.action.EDIT")))
  }
}

I’ve noted some interesting things for me in the Google IO especially test.