angularjs - createpy 和createspyobj 有什么区别

Question

我在我的代码中使用过类似的内容。

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

createSpy 是做什么的？我可以将 createSpy 调用更改为createspyobj 调用吗？

通过使用createSpy，我们可以创建一个函数/方法模拟。 Createspyobj 可以进行多个函数模拟。我说得对吗？

有什么区别。

Answer 1

当没有要监视的函数时，可以使用

jasmine.createSpy。它将像 spyOn 一样跟踪调用和参数，但没有实现。

jasmine.createSpyObj 用于创建一个模拟来监视一个或多个方法。它返回一个对象，该对象具有每个 spy 字符串的属性。

如果你想创建一个模拟，你应该使用jasmine.createSpyObj。查看下面的示例。

来自 Jasmine 文档 http://jasmine.github.io/2.0/introduction.html ...

创建 spy :

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");
  });
});

创建SpyObj:

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);
  });
});