message: Tested refresh null hash fluent navigation
diff: @@ -314,6 +314,22 @@ describe('Fluent', function () {
  });
  });
  + describe('Refresh Null Hash', function () {
  + it('should navigate', function() {
  + var stateNavigator = new StateNavigator([
  + { key: 's0', route: 'r0' },
  + { key: 's1', route: 'r1' }
  + ]);
  + var url = stateNavigator.fluent()
  + .navigate('s0')
  + .navigate('s1')
  + .refresh(null, null)
  + .url;
  + assert.strictEqual(url, '/r1');
  + assert.strictEqual(stateNavigator.stateContext.url, null);
  + });
  + });
  +
  describe('Back With Trail', function () {
  it('should navigate', function() {
  var stateNavigator = new StateNavigator([
  