如何为以下控制器创建测试？

Question

我需要为以下代码编写测试吗？

@Post()
    update(@Body() updateUserDto: UpdateUserDto, @Request() req) {
        return this.userService.update(req.user.user, updateUserDto);
      }

Answer 1

我将对控制器类的注射属性做出一些假设。对于完整的设置，您可以查看我的测试示例repo 。这本质上应该是您想要的

describe('UserController (Unit)', () => {
  let controller: UserController;
  let service: MockedClass<UserService>;

  beforeAll(async () => {
    const modRef = await Test.createTestingModule({
      controllers: [UserController],
      providers: [
        {
          provide: UserService,
          useValue: {
            update: jest.fn().mockReturnValue({ hello: 'world' }),
          },
        }
      ],
    }).compile();
    controller = modRef.get(UserController);
    service = modRef.get(UserService);
  });
  it('should call update and return the value', () => {
    const bodyVal = objectThatMatchesUpdateUserDto;
    const reqVal = {
      user: {
        user: valueThatMatchesReqUserUser
      }
    };
    const res = controller.update(bodyVal, reqVal);
    expect(res).toEqual({ hello: 'world' });
    expect(service.update).toBeCalledWith(reqVal.user.user, bodyVal)
  });
});