用于测试的Node - Stub nodemailer传输

npm install nodemailer sinon chai

// emailService.js
const nodemailer = require('nodemailer');

const transporter = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    user: 'your-email@gmail.com',
    pass: 'your-email-password'
  }
});

exports.sendEmail = async (to, subject, text) => {
  const mailOptions = {
    from: 'your-email@gmail.com',
    to,
    subject,
    text
  };

  await transporter.sendMail(mailOptions);
};

// emailService.test.js
const sinon = require('sinon');
const chai = require('chai');
const expect = chai.expect;
const emailService = require('./emailService');

describe('emailService', () => {
  let sendMailStub;

  beforeEach(() => {
    // 创建一个stub来模拟nodemailer的sendMail方法
    sendMailStub = sinon.stub(emailService.transporter, 'sendMail');
  });

  afterEach(() => {
    // 在每个测试后恢复原始方法
    sendMailStub.restore();
  });

  it('should call sendMail with correct arguments', async () => {
    const to = 'test@example.com';
    const subject = 'Test Subject';
    const text = 'Test Message';

    await emailService.sendEmail(to, subject, text);

    expect(sendMailStub.calledOnce).to.be.true;
    expect(sendMailStub.firstCall.args[0]).to.deep.equal({
      from: 'your-email@gmail.com',
      to,
      subject,
      text
    });
  });

  it('should handle errors', async () => {
    const error = new Error('Failed to send email');
    sendMailStub.rejects(error);

    try {
      await emailService.sendEmail('test@example.com', 'Test Subject', 'Test Message');
    } catch (err) {
      expect(err).to.equal(error);
    }
  });
});

npm install mocha -g

mocha emailService.test.js