Testing AngularJS resource with Jasmine - angularjs

Question

I would like to test my resource with following URL:
$resource(API_URL+'items/:id', {});
Where API_URL equals /app/api/
describe('item',function(){
it('should return same item id',function(){
$httpBackend.expectGET(API_URL+'items/1').respond({id:1});
var result = ItemService.item.get({id:1});
$httpBackend.flush();
expect(result.id).toEqual(1);
});
});
But the problem is that this test fails for some strange reason:
Error: Unexpected request: GET modules/home/partials/home.html
No more request expected
at $httpBackend
And when I add slash to $httpBackend URL like this:
$httpBackend.expectGET(API_URL+'/items/1').respond({id:1});
It throws following expection:
Error: Unexpected request: GET /app/api/items/1
Expected GET /app/api//items/1
at $httpBackend
Note double slash in expected GET.
How to fix it?
Update:
Code from ItemService:
var itemService = angular.module("ItemServiceModule", []);
itemService.factory("ItemService", [ "$resource", "API_URL", function($resource,API_URL) {
var itemService = {
item: $resource(API_URL+'items/:id', {})
};
return itemService;
}]);
Update2:
If I change httpBackend url like this (just add localhost and not adding slash before items):
$httpBackend.expectGET('http://localhost:8080'+API_URL+'items/1').respond({id:1});
Then the error is:
Error: Unexpected request: GET /app/api/items/1
Expected GET http://localhost:8080/app/api/items/1
at $httpBackend
Update3:
If I for example hard code that API_URL like this:
var url = 'app/api/items/1';
$httpBackend.expectGET(url).respond({id:1});
The error is:
Error: Unexpected request: GET /app/api/items/1
Expected GET app/api/items/1
at $httpBackend
But when I add slash at the begining of url, then it requests home partial modules/home/partials/home.html as with API_URL.
Error: Unexpected request: GET modules/home/partials/home.html
No more request expected
at $httpBackend

Answer 1

It turned out that the problem was with ui-router. Namely, the following configuration:
$urlRouterProvider.otherwise("/");
I just needed to eliminate this configuration in the tests:
beforeEach(module(function ($urlRouterProvider) {
$urlRouterProvider.otherwise(function(){return false;});
}));
Found this solution on https://github.com/angular-ui/ui-router/issues/212