Test.java

    @Test
    public void contentTest() {
            // quick check if the ListView is visible
            onView(withId(R.id.list)).check(matches(isDisplayed()));

            // click on a certain child view from the loaded list
            onData(allOf()).inAdapterView(withId(R.id.list_news)).atPosition(i)
                      .perform(click());
        }