assertTrue(fs.hasNext());
assertTrue(fs.hasVisibleNext());
assertFalse(fs.hasPrevious());
assertFalse(fs.hasVisiblePrevious());
fs.selectActivity(1, true);
assertFalse(fs.hasNext());
assertFalse(fs.hasVisibleNext());
assertTrue(fs.hasPrevious());
assertTrue(fs.hasVisiblePrevious());