使用Sinon在同一文件中的存根方法 [英] Stubbing method in same file using Sinon

问题描述

我正在尝试对文件中的函数进行单元测试，同时存根同一文件中的另一个函数，但没有应用模拟，而是调用了真正的方法.举个例子:

I'm trying to unit test a function in a file while stubbing another function in the SAME file, but the mock is not being applied and the real method is being called. Here's an example:

// file: 'foo.js'

export function a() {
   // .....
}

export function b() { 
   let stuff = a(); // call a
   // ...do stuff
}

还有我的测试:

import * as actions from 'foo';

const aStub = sinon.stub(actions, 'a').returns('mocked return');
actions.b(); // b() is executed, which calls a() instead of the expected aStub()

推荐答案

一些重组可以实现这一目标.

Some restructuring can make this work.

我使用了 commonJS 语法.在 ES6 中也应该以同样的方式工作.

I've used commonJS syntax. Should work in the same way in ES6 as well.

foo.js

const factory = {
  a,
  b,
}
function a() {
  return 2;
}

function b() {
  return factory.a();
}

module.exports = factory;

test.js

const ser = require('./foo');
const sinon = require('sinon');

const aStub = sinon.stub(ser, 'a').returns('mocked return');
console.log(ser.b());
console.log(aStub.callCount);

输出

模拟退货

1

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