createdpy和createspyobj有什么区别

  • Z时代
  • 2024-01-10
  • 分类：问答

我在我的代码中使用过。

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

在那createSpy做什么？我可以将createSpy调用更改为createdpyobj调用。

通过使用createSpy，我们可以创建一个函数/方法模拟。Createspyobj可以执行多个函数模拟。我对吗？

有什么区别。

回答：

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);
  });
});

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