NestJS + Mongoose:如何测试文档(数据).save()？
NestJS + Mongoose:如何测试文档(数据).save()？
提问于 2020-10-18 02:20:12
因为我使用了一些抽象，所以这里的代码只是接收一个用户，将其更改为Mongo格式(也就是在其他地方生成的id上添加一个下斜杠)，保存并返回保存的用户，而不在id上添加下斜杠：
constructor(
@InjectModel('User')
private readonly service: typeof Model
) { }
async saveUser(user: User): Promise<User> {
const mongoUser = this.getMongoUser(user);
const savedMongoUser = await new this.service(mongoUser).save();
return this.toUserFormat(savedMongoUser);
}我正在尝试的测试：
beforeEach(async () => {
const module: TestingModule = await Test.createTestingModule({
providers: [
MongoUserRepository,
{
provide: getModelToken('User'),
useValue: { ... }, // all used functions with jest.fn()
},
],
}).compile();
service = module.get<MongoUserRepository>(MongoUserRepository);
model = module.get<Model<UserDocument>>(getModelToken('User'));
});
it('should save new user', async () => {
jest.spyOn(model, 'save').mockReturnValue({
save: jest.fn().mockResolvedValueOnce(mockMongoFormat)
} as any);
const foundMock = await service.saveUser(mockUserFormat);
expect(foundMock).toEqual(mockUserFormat);
});问题：
No overload matches this call.
Overload 1 of 4, '(object: Model<UserDocument, {}>, method: "model" | "remove" | "deleteOne" | "init" | "populate" | "replaceOne" | "update" | "updateOne" | "addListener" | "on" | ... 45 more ... | "where"): SpyInstance<...>', gave the following error.
Argument of type '"save"' is not assignable to parameter of type '"model" | "remove" | "deleteOne" | "init" | "populate" | "replaceOne" | "update" | "updateOne" | "addListener" | "on" | "once" | "removeListener" | "off" | "removeAllListeners" | ... 41 more ... | "where"'.
Overload 2 of 4, '(object: Model<UserDocument, {}>, method: "collection"): SpyInstance<Collection, [name: string, conn: Connection, opts?: any]>', gave the following error.
Argument of type '"save"' is not assignable to parameter of type '"collection"'.ts(2769)尝试使用"new“也是行不通的：
No overload matches this call.
Overload 1 of 4, '(object: Model<UserDocument, {}>, method: "find" | "watch" | "translateAliases" | "bulkWrite" | "model" | "$where" | "aggregate" | "count" | "countDocuments" | ... 46 more ... | "eventNames"): SpyInstance<...>', gave the following error.
Argument of type '"new"' is not assignable to parameter of type '"find" | "watch" | "translateAliases" | "bulkWrite" | "model" | "$where" | "aggregate" | "count" | "countDocuments" | "estimatedDocumentCount" | "create" | "createCollection" | ... 43 more ... | "eventNames"'.
Overload 2 of 4, '(object: Model<UserDocument, {}>, method: "collection"): SpyInstance<Collection, [name: string, conn: Connection, opts?: any]>', gave the following error.
Argument of type '"new"' is not assignable to parameter of type '"collection"'.我可能会改变实现方式...但我真的很想知道在这种情况下该怎么做。我该如何模拟这个函数呢？
回答 1
Stack Overflow用户
回答已采纳
发布于 2020-12-26 22:58:20
在放弃了一段时间后，回来做了这样的事情：
async saveUser ( user: User ): Promise<User> {
const mongoUser = this.getMongoUser(user);
const savedMongoUser = await this.service.create( mongoUser );
return this.toUserFormat(savedMongoUser);
}从新服务(文档).save()改为service.create(文档)
通过测试的结果是：
it( 'should save new user', async () => {
jest.spyOn( model, 'create' ).mockImplementation(
jest.fn().mockResolvedValueOnce( mockMongoFormat )
);
const foundMock = await service.saveUser( mockUserFormat );
expect( foundMock ).toEqual( mockUserFormat );
} );用这个..。100%覆盖率。好的。
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原文链接：
https://stackoverflow.com/questions/64405853
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