etCollapseComputedStyle().height;
          // verify height is 0px
          assert.equal(h, '0px');
          done();
        }, delay);
      });
      
      test('test opened: true', function(done) {
        collapse.opened = true;
        Polymer.flush();
        setTimeout(function() {
          var h = getCollapseComputedStyle().height;
          // verify height
          assert.equal(h, collapseHeight);
          done();
        }, delay);
      });

    });

  </script>

</body>
</html>
