AngularJS ui-router: Test ui-sref

问题:

I'm trying to test some views, that are using <a ui-sref='someState'>link</a> to link to other states in my application. In my tests I'm triggering a click on this elements like this:

element.find('a').click()

How do I test, if the state is switched to someState? It would be easy, when using $state in my controller like this:

// in my view
<a ng-click="goTo('someState')">link</a>

// in my controller
$scope.goTo = function(s) {
  $state.go(s)
};

// in my tests
spyOn($state, 'go');
element.find('a').click()
expect($state.go).toHaveBeenCalled()

But when I use ui-sref I don't know what object to spy on. How can I verify, that my application is in the right state?

回答1:

I found it myself. After having a look into the angular ui router source code, I found this line inside the ui-sref directive:

// angular-ui-router.js#2939
element.bind("click", function(e) {
  var button = e.which || e.button;
  if ( !(button > 1 || e.ctrlKey || e.metaKey || e.shiftKey || element.attr('target')) ) {
    // HACK: This is to allow ng-clicks to be processed before the transition is initiated:
    $timeout(function() {
      $state.go(ref.state, params, options);
    });
    e.preventDefault();
  }
});

When the element receives a click, the $state.go is wrapped in a $timout callback. So, in your tests, you have to inject the $timeout module. Then just do a $timeout.flush() like this:

element.find('a').click();
$timeout.flush();
expect($state.is('someState')).toBe(true);

回答2:

You can use :

[...]
element.find('a').click()
expect($state.is('someState')).toBe(true)

Hope this helps

回答3:

I think you need to use $rootScope.$apply() in order to have the state change.