What is the difference between createspy and createspyobj

jasmine.createSpy can be used when there is no function to spy on. It will track calls and arguments like a spyOn but there is no implementation.

jasmine.createSpyObj is used to create a mock that will spy on one or more methods. It returns an object that has a property for each string that is a spy.

If you want to create a mock you should use jasmine.createSpyObj. Check out the examples below.

From the Jasmine documentation http://jasmine.github.io/2.0/introduction.html...

createSpy:

describe("A spy, when created manually", function() {  var whatAmI;  beforeEach(function() {    whatAmI = jasmine.createSpy('whatAmI');    whatAmI("I", "am", "a", "spy");  });  it("is named, which helps in error reporting", function() {    expect(whatAmI.and.identity()).toEqual('whatAmI');  });  it("tracks that the spy was called", function() {    expect(whatAmI).toHaveBeenCalled();  });  it("tracks its number of calls", function() {    expect(whatAmI.calls.count()).toEqual(1);  });  it("tracks all the arguments of its calls", function() {    expect(whatAmI).toHaveBeenCalledWith("I", "am", "a", "spy");  });  it("allows access to the most recent call", function() {    expect(whatAmI.calls.mostRecent().args[0]).toEqual("I");  });});

createSpyObj:

describe("Multiple spies, when created manually", function() {  var tape;  beforeEach(function() {    tape = jasmine.createSpyObj('tape', ['play', 'pause', 'stop', 'rewind']);    tape.play();    tape.pause();    tape.rewind(0);  });  it("creates spies for each requested function", function() {    expect(tape.play).toBeDefined();    expect(tape.pause).toBeDefined();    expect(tape.stop).toBeDefined();    expect(tape.rewind).toBeDefined();  });  it("tracks that the spies were called", function() {    expect(tape.play).toHaveBeenCalled();    expect(tape.pause).toHaveBeenCalled();    expect(tape.rewind).toHaveBeenCalled();    expect(tape.stop).not.toHaveBeenCalled();  });  it("tracks all the arguments of its calls", function() {    expect(tape.rewind).toHaveBeenCalledWith(0);  });});