Question

我想伪造或存根未用作对象方法的函数。请参见mylib.js

// multiplicaiton.js

module.exports = function(x,y) {
  return x*y;
}

// mylib.js

let Multiplication = require('./multiplication');

let myLib = function(x,y) {
  var result = Multiplication(x,y)
  return result
}

module.exports = myLib;

// test.js

let sinon = require('sinon');
let mylib = require('./mylib');
let chai = require('chai');
let expect = chai.expect;

describe('My Test', function() {

   it('Faking Globally',function() {
     //How do I declare 'multiplication' as Globally and fake it.
     expect(mylib(2,3)).to.deep.equal(6);
   })

})

Answer 1

如果要全局替换模块，则需要使用 link seam ，它基本上会注入 different 模块（例如Sinon间谍），而不是真正的模块。一。您可以看到a whole how-to in the Sinon documentation。

对于您的情况，它类似于

const proxyquire = require('proxyquire');
const sinon = require('sinon');
const chai = require('chai');
const expect = chai.expect;

// replace the dependency with a stub
const multiplicationFake = sinon.fake.returns(42);
const mylib = proxyquire('./mylib', { './multiplication': multiplicationFake });

describe('My Test', function() {

   it('Faking Globally',function() {
     const result = mylib(2,3);
     expect(multiplicationFake.calledOnce).to.equal(true);
     expect(result).to.deep.equal(42);
   })   
})

我在这里使用了锡诺的假货，但如果您愿意，可以使用间谍或存根。

sinon依赖函数伪造

1 个答案: