androidx.test.espresso.NoMatchingViewException: No views in hierarchy found matching

[imayank91]

Description

This fails

onView(withText(R.string.discard_all_changes)).check(matches(isDisplayed()))

with error

androidx.test.espresso.NoMatchingViewException: No views in hierarchy found matching: with string from resource id: <2131886171>[discard_all_changes] value: Discard all changes?

This is actually a snack bar

Robolectric & Android Version

Robolectric: 4.3-beta-1
Android SDK 28
Android Studio 3.3.2

[zabi90]

Hi imayank91, Did you launch your fragment with FragmentScenario.launchInContainer() method?

[imayank91]

Yeah I did launch the fragment using FragmentScenario.launchInContainer()

[zabi90]

I was facing same problem but my mistake was using simple launch() method.
My current code is

  val contactListFragment = ContactListFragment()

        FragmentScenario.launchInContainer(ContactListFragment::class.java,null, R.style.AppTheme,object: FragmentFactory(){
            override fun instantiate(classLoader: ClassLoader, className: String): Fragment {
                return contactListFragment.apply {
                    viewModel = ContactViewModel(dataBaseHelper)
                }
            }
        })

[imayank91]

I am doing this . But no luck

        scenario = launchFragmentInContainer(themeResId = R.style.AppTheme)
        navController = Mockito.mock(NavController::class.java)
        scenario.onFragment {
            Navigation.setViewNavController(it.requireView(),navController)
        }