jasmine.createSpy没有任何功能可以监视时使用。它将像a那样跟踪调用和参数，
spyOn但是没有实现。
jasmine.createSpyObj用于创建可监视一种或多种方法的模拟。它返回一个对象，该对象具有作为间谍的每个字符串的属性。
如果要创建模拟，则应使用
jasmine.createSpyObj。查看以下示例。
从Jasmine文档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); });});
