Espresso: How to do custom swipe e.g. swipeTop or swipeBottom

Question

So far we can do:

• swipeLeft
• swipeRight
• swipeUp
• swipeDown

How can we swipeTop(all the way to the Top) or swipeBottom(all the way to the bottom) is expresso. Please give me an example if these methods already exists.

Answer 1

Have you tried a GeneralSwipeAction like that?

private static ViewAction swipeFromTopToBottom() {
    return new GeneralSwipeAction(Swipe.FAST, GeneralLocation.TOP_CENTER,
            GeneralLocation.BOTTOM_CENTER, Press.FINGER);
}

Maybe you have to provide a custom implementation for the second and/or third parameter, as Anna already mentioned:

new CoordinatesProvider() {
    @Override
    public float[] calculateCoordinates(View view) {
        float[] coordinates =  GeneralLocation.CENTER.calculateCoordinates(view);
        coordinates[1] = 0;
        return coordinates;
    }
}

Answer 2

For example if you use recyclerView in yours application, you can use something like this:

Espresso.onView(ViewMatchers.withId(R.id.recyclerView)).perform(ViewActions.swipeUp())

or

Espresso.onView(ViewMatchers.withId(R.id.recyclerView)).perform(ViewActions.swipeDown())