er, center + 50), "child 1 position ok");
        });
      });

      suite('justification', function() {
        var container;

        setup(function() {
          container = fixture('flex');
          container.classList.add('horizontal');
        });

        test('layout-justified', function() {
          container.classList.add('justified');
          assert.isTrue(positionEquals(container, 0, 50, 0, 300), "container position ok");
          var center = (300 - 50) / 2;
          assert.isTrue(posi