Testing functions with only http request in karma?

I have to test an AngularJS app and I am trying to do the unit testing for the services. The services have functions that look like this:

      getData: function(){
      return $http.get(serviceRoot+'/getData/'+anotherService.id()).then(function(response) {
              return secondService.validateServerJson(response.data.key);
      }, function(error) {
        return false;
      })
    },

is there a point to write a test for this since I am mocking the http requests?