问题:

Is there a way to test using Espresso that the snackbar shows up with the right text?

I have a simple call to create a snackbar

Snackbar.make(mView, "My text", Snackbar.LENGTH_LONG).show();

I have tried this without luck

onView(withText("My text")).inRoot(withDecorView(not(is(mActivityRule.getActivity().getWindow().getDecorView())))).check(matches(isDisplayed()));

回答1:

This worked for me, please try.

onView(allOf(withId(android.support.design.R.id.snackbar_text), withText("My text")))
            .check(matches(isDisplayed()));

If you use AndroidX, please use the following:

onView(withId(com.google.android.material.R.id.snackbar_text))
        .check(matches(withText(R.string.whatever_is_your_text)))

回答2:

An alternative

private void checkSnackBarDisplayedByMessage(
        @StringRes int message) {
    onView(withText(message))
            .check(matches(withEffectiveVisibility(
                    ViewMatchers.Visibility.VISIBLE
            )));
}

回答3:

I saw the previous answers but I thought this would be better.

@Test
public void onFabClick_shouldDisplaySnackbar() throws Exception {
  onView(withId(R.id.fab)).perform(click());

  // Compare with the text message of snackbar
  onView(withText(R.string.snackbar_message))
      .check(matches(isDisplayed()));
}