2.children[4].classList.contains('iron-selected'));
        // check item
        assert.equal(s2.selectedItem, s2.children[4]);
      });

      test('fire iron-select when selected is set', function() {
        // setup listener for iron-select event
        var selectedEventCounter = 0;
        s2.addEventListener('iron-select', function(e) {
          selectedEventCounter++;
        });
        // set selected
        s2.selected = 'item4';
        // check iron-select event
        assert.equal(selecte