testing a angular service call containing an anonymous function inside the link function

I am having trouble testing an angular service used inside of the link function.

My service Global Passes an anonymous function as the second with a value as its argument. Ex...

$scope.gallery = [];
    Global('PhotoGallery', function (PhotoGallery) {
        $scope.gallery = PhotoGallery;
    });  

I need to test that $scope.gallery is set to equal PhotoGallery; Inside of my spec I used window to set a value and pass it in as the first argument.

it('should set PhotoGalleryVM equal to $scope.PhotoGallery', function() {
            window.thisIsATest = 'Test';
            Globals('thisIsATest', function(thisisATest) {
                console.log('this is a test',thisisATest); //Logs: Test})
            });

            // tried calling haGlobals as a method, but this didn't work 

            haGlobals(thisIsATest);

            // returns an empty array  []
            expect(scope.gallery).to.equal('Test');
        });

I am using bard js to inject the service

   bard.inject(Global)