Developer Guide: Angular Services: Testing Angular Services

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Following is a unit test for the service in the example in Registering Angular Services. The unit test example uses Jasmine spy (mock) instead of a real browser alert.

var mock, notify;


beforeEach(function() {
mock = {alert: jasmine.createSpy()};
notify = angular.service('notify')(mock);
});


it('should not alert first two notifications', function() {
notify('one');
notify('two');
expect(mock.alert).not.toHaveBeenCalled();
});


it('should alert all after third notification', function() {
notify('one');
notify('two');
notify('three');
expect(mock.alert).toHaveBeenCalledWith("one\ntwo\nthree");
});


it('should clear messages after alert', function() {
notify('one');
notify('two');
notify('third');
notify('more');
notify('two');
notify('third');
expect(mock.alert.callCount).toEqual(2);
expect(mock.alert.mostRecentCall.args).toEqual(["more\ntwo\nthird"]);
});

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