      test('layout-horizontal-reverse', function() {
          container.classList.add('horizontal-reverse');
          assert.isTrue(positionEquals(container, 0, 50, 0, 300), "container position ok");
          //     |c3| |c2| |c1|
          assert.isTrue(positionEquals(c1, 0, 50, 250, 300), "child 1 position ok");
          assert.isTrue(positionEquals(c2, 0, 50, 200, 250), "child 2 position ok");
          assert.isTrue(positionEquals(c3, 0, 50, 150, 200), "child 3 position ok");
        });

        te