ReferenceError: confirm is not defined

Question

我正在运行使用 mocha 对函数进行单元测试。我看到这个错误 ReferenceError: confirm is not defined。我该如何解决？

file.js

function writeTOFile(server, pin) {
  let dContinue = confirm("You are uploading a file . Do you want to continue?");
  if(dContinue) {
   //do something
  } else {
   ....
  }        
}

**test.spec.js

let file = require("file.js");
const expect = require('chai').expect;

it('test something',function (){
file.writeTOFile("fghsssbn", "5647");
expect(somevalue).to.be(something);
})

当我运行 mocha test.js时，我看到上面的，如何通过这个错误。

Answer 1

这里是node测试环境下的单元测试方案。您应该在 global 变量中添加 confirm 方法。

file.js:

function writeTOFile(server, pin) {
  let dContinue = confirm("You are uploading a file . Do you want to continue?");
  if (dContinue) {
    console.log("do something");
  } else {
    console.log("do another thing");
  }
}

module.exports = { writeTOFile };

file.test.js:

const sinon = require("sinon");
const file = require("./file");

describe("59883330", () => {
  afterEach(() => {
    sinon.restore();
  });
  it("should do something", function() {
    global.confirm = sinon.stub().returns(true);
    sinon.stub(console, "log");
    file.writeTOFile("fghsssbn", "5647");
    sinon.assert.calledWithExactly(global.confirm, "You are uploading a file . Do you want to continue?");
    sinon.assert.calledWithExactly(console.log, "do something");
  });

  it("should do another thing", () => {
    global.confirm = sinon.stub().returns(false);
    sinon.stub(console, "log");
    file.writeTOFile("fghsssbn", "5647");
    sinon.assert.calledWithExactly(global.confirm, "You are uploading a file . Do you want to continue?");
    sinon.assert.calledWithExactly(console.log, "do another thing");
  });
});

100% 覆盖率的单元测试结果：

 59883330
    ✓ should do something
    ✓ should do another thing


  2 passing (11ms)

--------------|----------|----------|----------|----------|-------------------|
File          |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
--------------|----------|----------|----------|----------|-------------------|
All files     |      100 |      100 |      100 |      100 |                   |
 file.js      |      100 |      100 |      100 |      100 |                   |
 file.test.js |      100 |      100 |      100 |      100 |                   |
--------------|----------|----------|----------|----------|-------------------|

如果你的测试环境是browser，confirm方法存在于window变量中。

源代码：https://github.com/mrdulin/mocha-chai-sinon-codelab/tree/master/src/Whosebug/59883330

ReferenceError: confirm is not defined

ReferenceError: confirm is not defined

javascript

unit-testing

mocha.js

node.js