Angular UI Router pass parameter to .go

I ran today into a tricky way of using ui-router: if you pass a parameter to go('state'), it doesn't arrive in the controller that handles that state. This is because you need to declare the parameter in the state, for it to be taken into account. If you don't do this, the parameter won't arrive in the controller. 

So, when declaring the route:

$stateProvider.state('app.page', {
url: '/page/:param',
....
});

And the redirect call:

$state.go('app.page', { param: 'test' });

In the controller, you can get the parameter using $stateParams.param (make sure you declare $stateParams in the controller's constructor, in order for it to get injected).