Check if a dialog is displayed with Espresso

Question

I\'m trying to write some tests with the new android-test-kit (Espresso). But I can\'t find any information on how to check if a dialog is displayed and per

Answer 1

To answer question 4, which the accepted answer does not, I modified the following code, which I found here on Stack Overflow (link) for testing whether a Toast was displayed.

@NonNull
public static ViewInteraction getRootView(@NonNull Activity activity, @IdRes int id) {
    return onView(withId(id)).inRoot(withDecorView(not(is(activity.getWindow().getDecorView()))));
}

The id passed in is the id of a View currently displayed in your dialog. You could also write the method like so:

@NonNull
public static ViewInteraction getRootView(@NonNull Activity activity, @NonNull String text) {
    return onView(withText(text)).inRoot(withDecorView(not(is(activity.getWindow().getDecorView()))));
}

And now it's looking for a View containing a particular text string.

Use it like so:

getRootView(getActivity(), R.id.text_id).perform(click());