The following should work for a service without parameter, maybe this can be a starting point:
describe("Unit: Testing Services", function() {
describe("Search Service:", function() {
beforeEach(function() {
angular.module('app');
});
it('should contain a searchService',
inject(function(searchService) {
expect(searchService).not.to.equal(null);
}));
it('should contain two search options',
inject(function(searchService) {
expect(searchService.getSearchOptions()).to.equal(2);
}));
});
});
(You can also have a look here: How do I test an AngularJS service with Jasmine?)