Nodejs/NestJS ExceptionFilter捕获方法的Jest单元测试

// 异常过滤器类
import { Catch, ExceptionFilter, ArgumentsHost } from '@nestjs/common';

@Catch(Error)
export class MyExceptionFilter implements ExceptionFilter {
  catch(exception: Error, host: ArgumentsHost) {
    // 在这里编写自定义的异常处理逻辑
    console.error('捕获到异常:', exception.message);
  }
}

// 测试用例
import { Test, TestingModule } from '@nestjs/testing';
import { MyExceptionFilter } from './my-exception.filter';
import { MyController } from './my.controller';

describe('MyController', () => {
  let controller: MyController;

  beforeEach(async () => {
    const module: TestingModule = await Test.createTestingModule({
      controllers: [MyController],
      providers: [
        {
          provide: APP_FILTER,
          useClass: MyExceptionFilter,
        },
      ],
    }).compile();

    controller = module.get<MyController>(MyController);
  });

  describe('getData', () => {
    it('should throw an exception', () => {
      jest.spyOn(controller, 'getData').mockImplementation(() => {
        throw new Error('Test Exception');
      });

      expect(() => controller.getData()).toThrowError('Test Exception');
    });
  });
});