message: Tested blank crumb in the trail
diff: @@ -5583,6 +5583,17 @@ describe('MatchTest', function () {
  });
  });
  + describe('Crumb Trail Blank', function() {
  + it ('should not match', function() {
  + var stateNavigator = new StateNavigator([
  + { key: 's0', route: '{x}' },
  + { key: 's1', route: 'ab/c', trackCrumbTrail: true }
  + ]);
  + assert.throws(() => stateNavigator.parseLink('/ab/c?crumb=www.google.com&crumb='), /Url .*is invalid/);
  + assert.throws(() => stateNavigator.parseLink('/ab/c?crumb='), /Url .*is invalid/);
  + });
  + });
  +
  describe('Param Constraint', function () {
  var stateNavigator: StateNavigator;
  beforeEach(function () {
  