当使用带有"class transformer"的nestjs时，我得到了不同的ISO日期字符串，其

我正在为一个nestjs应用程序编写一个测试，但是，输出日期和预期日期不匹配：

这是模拟生成器：

export function createMockUser(data: Partial<User>): User {
return {
id: data.id || randomUUID(),
firstName: data.firstName || faker.name.firstName(),
lastName: data.lastName || faker.name.lastName(),
emailAddress: data.emailAddress || faker.internet.email(),
createdAt: data.createdAt || new Date(),
updatedAt: data.updatedAt || new Date(),
};
}

这就是测试：

describe('create', () => {
it('creates and returns user', async () => {
const randomUser = createMockUser({});
const user = new UserEntity(randomUser);
usersServiceCreateMock.mockResolvedValue(user);
const response = await tester.http
.post('/api/users')
.set('Accept', 'application/json')
.set('Authorization', 'Bearer fake-token')
.send({
firstName: randomUser.firstName,
lastName: randomUser.lastName,
})
.expect(201);
expect(response.body).toEqual(instanceToPlain(user));
});
});

如果有人感兴趣，这就是控制器：

@UseGuards(FirebaseAuthGuard)
@ApiBearerAuth()
@UseInterceptors(ClassSerializerInterceptor)
@Controller('users')
export class UsersController {
constructor(private readonly usersService: UsersService) {}
@Post()
async create(
@Body() createUserDto: CreateUserPostDto,
@CurUser() user: DecodedIdToken
): Promise<UserEntity> {
return await this.usersService.create({
...createUserDto,
id: user.uid,
emailAddress: user.email,
});
}
}

这是输出：

这是输出：

expect(received).toEqual(expected) // deep equality
- Expected  - 3
+ Received  + 3
- UserEntity {
-   "createdAt": 2022-08-21T13:25:49.621Z,
+ Object {
+   "createdAt": "2022-08-21T13:25:49.771Z",
"emailAddress": "Tyshawn.Hudson@gmail.com",
"firstName": "Billy",
"id": "ead38580-287f-4003-8f8c-e1c5e2243cfd",
"lastName": "Bins",
-   "updatedAt": 2022-08-21T13:25:49.621Z,
+   "updatedAt": "2022-08-21T13:25:49.772Z",
}

我不知道是什么导致了以毫秒为单位的差异。

即使我不使用instanceToPlain(user)，结果也是一样的，如果我在日期上应用Transform，结果也是相同的，例如：

@Transform(({ value }) => value.toISOString())
createdAt: Date;
@Transform(({ value }) => value.toISOString())
updatedAt: Date;