如何在jest中模拟Logger

npm install jest --save-dev

class Logger {
  constructor() {
    // 初始化Logger
  }

  log(message) {
    // 记录日志
  }

  error(message) {
    // 记录错误日志
  }
}

module.exports = Logger;

jest.mock('./logger');

const Logger = require('./logger');

describe('Logger', () => {
  test('should log a message', () => {
    const logger = new Logger();
    const logSpy = jest.spyOn(logger, 'log');

    logger.log('Test message');

    expect(logSpy).toHaveBeenCalledWith('Test message');
  });

  test('should log an error message', () => {
    const logger = new Logger();
    const errorSpy = jest.spyOn(logger, 'error');

    logger.error('Error message');

    expect(errorSpy).toHaveBeenCalledWith('Error message');
  });
});