tionEquals(c1, 0, 50, 0, 50), "child 1 position ok");
          assert.isTrue(positionEquals(c2, 0, 50, center, center + 50), "child 2 position ok");
          assert.isTrue(positionEquals(c3, 0, 50, 250, 300), "child 3 position ok");
        });

        test('layout-around-justified', function() {
          container.classList.add('around-justified');
          assert.isTrue(positionEquals(container, 0, 50, 0, 300), "container position ok");
          var spacing = (300 - 50 * 3) / 6;
          // Every c