Espresso ViewMatchers -> withDrawable

ViewMatchers.java

public static Matcher<View> withDrawable(final int resourceId) {
    return new TypeSafeMatcher<View>() {
        @Override
        public void describeTo(Description description) {
            description.appendText("with drawable from resource id: " + resourceId);
        }

        @Override
        public boolean matchesSafely(View view) {
            try {
                final Drawable resourcesDrawable = view.getResources().getDrawable(resourceId);
                if (view instanceof ImageView) {
                    final ImageView imageView = (ImageView) view;
                    if (imageView.getDrawable() == null) {
                        return resourcesDrawable == null;
                    }
                    return imageView.getDrawable().getConstantState()
                            .equals(resourcesDrawable.getConstantState());
                }
            } catch (Resources.NotFoundException ignored) {

            }
            return false;
        }
    };
}

Hi @AlexKorovyansky , have you tested this on a device running Lollipop? I have the feeling it doesn't work, maybe because of the RippleDrawable thing

Mdelolmo, it will not work because this:
return imageView.getDrawable().getConstantState()
.equals(resourcesDrawable.getConstantState());

Starting at SDK 21, we have to change the way we compare, the solution would be:
return imageView.getDrawable().getConstantState()
.equals(imageView.getContext().getDrawable(resourceId).getConstantState());

I guess this won't work with vector drawable, will it?