在node.js中使用Jest和Mock测试Sendgrid实现

npm init -y

npm install @sendgrid/mail jest jest-mock

const sgMail = require('@sendgrid/mail');

function sendEmail(to, subject, text) {
  sgMail.setApiKey('YOUR_SENDGRID_API_KEY');
  
  const msg = {
    to,
    from: 'your-email@example.com',
    subject,
    text,
  };

  return sgMail.send(msg);
}

module.exports = {
  sendEmail,
};

const sendgrid = require('./sendgrid');
const sgMail = require('@sendgrid/mail');

jest.mock('@sendgrid/mail');

describe('Sendgrid', () => {
  beforeEach(() => {
    jest.clearAllMocks();
  });

  test('should send email successfully', async () => {
    const to = 'recipient@example.com';
    const subject = 'Test Email';
    const text = 'This is a test email';

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

    expect(sgMail.send).toHaveBeenCalledTimes(1);
    expect(sgMail.send).toHaveBeenCalledWith({
      to,
      from: 'your-email@example.com',
      subject,
      text,
    });
  });
});

npm test