ner, 0, 300, 0, 300), "container position ok");
          assert.isTrue(positionEquals(c1, 250, 300, 0, 50), "child 1 position ok");
        });

        test('layout-start-justified', function() {
          container.classList.add('start-justified');
          assert.isTrue(positionEquals(container, 0, 50, 0, 300), "container position ok");
          assert.isTrue(positionEquals(c1, 0, 50, 0, 50), "child 1 position ok");
        });

        test('layout-end-justified', function() {
          container.cla