Javascript 使用Sinon.JS stubing async.瀑布

我试图通过使用stub来测试我的一个函数

我的测试是：

describe('water', function() {
  it ('successfully falls', function() {
    // function under test
    var waterfall = functions.waterfall;

    var callback = function(err, number) {
      expect(err).to.be.null;
      expect(number).to.equal(5);
    };

    // I would like this stub to run instead of functions.myFunction
    sinon.stub(functions, 'myFunction', function(number, callback) {
      console.log("[myFunction] stub was called");
      callback(null, number);
    });

    waterfall(callback);
    // I suppose this is happening: myFunction(5, callback) 
    expect(functions.myFunction.withArgs(5, callback)).to.have.been.called;
    expect(callback).to.have.been.called;
  });
});

因此测试通过，但存根被忽略，因为调用了

doBigThing

：

  Water
    ✓ successfully falls
[myFunction] was called
[doBigThing] was called

相反，我想看看

  Water
    ✓ successfully falls
[myFunction] stub was called

---

我可能错过了一些东西，我会感谢你的帮助。

你正在删除

函数

对象的方法

我的函数

，但在

瀑布

方法中，你调用的是

我的函数

函数（我实际上无法在我的环境中运行你的代码，我明白了。）“ReferenceError:myFunction未定义”）。因此这应该可以工作：

// functions.js
var functions = {
  // function I don't want to run
  doBigThing: function() {
    console.log("[doBigThing] was called");
  },

  // function I want to stub
  myFunction: function(number, callback) {
    console.log("[myFunction] was called");
    functions.doBigThing(); // CHANGE HERE
    callback(null, number);
  },

  // function I want to test
  waterfall: function(callback) {
    return async.waterfall([
      async.constant(5), // 5 just for the demo
      functions.myFunction // CHANGE HERE
    ], callback);
  }
};

module.exports = functions;

---

我正在运行代码，得到了您想要的结果：✓ 已成功调用[myFunction]存根

// functions.js
var functions = {
  // function I don't want to run
  doBigThing: function() {
    console.log("[doBigThing] was called");
  },

  // function I want to stub
  myFunction: function(number, callback) {
    console.log("[myFunction] was called");
    functions.doBigThing(); // CHANGE HERE
    callback(null, number);
  },

  // function I want to test
  waterfall: function(callback) {
    return async.waterfall([
      async.constant(5), // 5 just for the demo
      functions.myFunction // CHANGE HERE
    ], callback);
  }
};

module.exports = functions;