MyFragmentTest2.kt

@RunWith(AndroidJUnit4::class)
class MyFragmentTest {
  @Test
  fun buttonIsEnabled() {
    TestMyFragment.testViewModel = MyViewModel().also 
      it.updateState(enabled = true)
    }
    launchFragmentInContainer<TestMyFragment>()
    onView(withId(R.id.button)).check(matches(isEnabled()))
  }
  @Test
  fun buttonIsDisabled() {
    TestMyFragment.testViewModel = MyViewModel().also 
      it.updateState(enabled = false)
    }
    launchFragmentInContainer<TestMyFragment>()
    onView(withId(R.id.button)).check(matches(not(isEnabled())))
  }
}