Testing Snackbar show with Espresso

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()));

Answer

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)))