Angular unit testing with Jasmine: how to remove or modify spyOn

Question

AngularJS v1.2.26

Jasmine v2.2.0

How can I change or remove the behavior of a spyOn? When I try to override it, I get the following error: Error: getUpdate has already been spied upon

var data1 = 'foo'; var data2 = 'bar';  describe("a spec with a spy", function(){      beforeEach(module('app'));      var $q;      beforeEach(inject(function(_updateService_, _$q_){         updateService = _updateService_;          //spy the results of the getUpdate()         $q = _$q_;         var deferred = $q.defer();         deferred.resolve( data1 );         spyOn(updateService, 'getUpdate').and.returnValue(deferred.promise);      }));      describe('and here the spy should be different', function() {          it('returns a different value', function() {            var deferred = $q.defer();           deferred.resolve( data2 );           spyOn(updateService, 'getUpdate'); //ERROR HERE           updateService.getUpdate.and.returnValue(deferred.promise);            ...          });     });  ... 

When I remove the second spyOn the test doesn't work.

How do I do this?

Answer 1

You can just overwrite it

updateService.getUpdate = jasmine.createSpy().and.returnValue(etc) 

Answer 2

You can override the return value of the spy

    var deferred = $q.defer();     deferred.resolve( data1 );      var getUpdateSpy = spyOn(updateService, 'getUpdate').and.returnValue(deferred.promise);        var newDeferred = $q.defer();     newDeferred.resolve( data2 );      getUpdateSpy.and.returnValue(newDeferred.promise);