内部对象函数的SinonJS调用一次或调用计数问题

Question

使用 SinonJS 3 运行测试我面临以下问题

测试有什么问题？

var creator = (function() {

  var createIfNotExists = function createIfNotExists() {
    _doCreate();
  };

  var _doCreate = function _doCreate() {
    console.log('_doCreate was called');
  };

  return {
    createIfNotExists:createIfNotExists,
    _doCreate:_doCreate
  };
}());

var util = {
  createIfNotExists:creator.createIfNotExists,
  _doCreate:creator._doCreate
};

var spyRequester = sinon.spy(util, '_doCreate');
util.createIfNotExists();

console.log(spyRequester.callCount); // prints 0 (should be 

线console.log(spyRequester.callCount); 应该打印 1 但它打印 0

https://codepen.io/thiagoh/pen/XaxBjr?editors=1011

Answer 1

您当前的createIfNotExists 实现正在调用在其范围内捕获的_doCreate。如果你想让它运行你的模拟，你应该以某种方式使这个函数之间的“链接”动态化。在您的特定情况下，使用 this._doCreate 应该可以工作。但是，如果使用不正确的上下文调用它会使您的 createIfNotExists 失败。

var creator = (function() {

  var createIfNotExists = function createIfNotExists() {
    // pick _doCreate from the context or use default.
    (this._doCreate || _doCreate)();
  };

  var _doCreate = function _doCreate() {
    console.log('_doCreate was called');
  };

  return {
    createIfNotExists:createIfNotExists,
    _doCreate:_doCreate
  };
}());

var util = {
  createIfNotExists:creator.createIfNotExists,
  _doCreate:creator._doCreate
};

var spyRequester = sinon.spy(util, '_doCreate');
util.createIfNotExists();

console.log(spyRequester.callCount); // prints 1

<script src="https://unpkg.com/sinon@3.2.1/pkg/sinon-3.2.1.js"></script>