Espresso: how to scroll to the bottom of ScrollView

Question

How is it possible to scroll down to the bottom of ScrollView in Espresso test? Thanks!

Answer 1

For completeness (based on Morozov's answer), you can pass a custom ViewAction instead of scrollTo(), which allows to use NestedScrollView:

ViewAction customScrollTo = new ViewAction() {

    @Override
    public Matcher getConstraints() {
        return allOf(withEffectiveVisibility(ViewMatchers.Visibility.VISIBLE), isDescendantOfA(anyOf(
            isAssignableFrom(ScrollView.class),
            isAssignableFrom(HorizontalScrollView.class),
            isAssignableFrom(NestedScrollView.class)))
        );
    }

    @Override
    public String getDescription() {
        return null;
    }

    @Override
    public void perform(UiController uiController, View view) {
        new ScrollToAction().perform(uiController, view);
    }
};

And use it like this:

onView(withId(R.id.onBottomOfScrollView)).perform(customScrollTo, click());