return $provide.decorator('aservice',function($delegate) {
            $delegate.addFn = jasmine.createSpy().andReturn(true);
            return $delegate;
        });

当没有任何功能进行间谍时，可以使用jasmine.createSpy。它将跟踪一个spyOn的呼叫和参数，但没有实现。 @H_404_3@jasmine.createSpyObj用于创建一个可以侦测一个或多个方法的模拟器。它返回一个对象，该对象具有每个作为间谍的字符串的属性。

@H_404_3@如果你想创建一个模拟，你应该使用jasmine.createSpyObj。查看下面的例子。

@H_404_3@从茉莉花文档http://jasmine.github.io/2.0/introduction.html …

@H_404_3@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","spy");
  });

  it("allows access to the most recent call",function() {
    expect(whatAmI.calls.mostRecent().args[0]).toEqual("I");
  });
});

@H_404_3@createSpyObj：

describe("Multiple spies,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);
  });
});