Jestjs 如何使用jest和sequelize typescript对sequelize数据库调用进行单元测试
在对在数据库模型中创建记录的函数进行单元测试时,我遇到以下错误Jestjs 如何使用jest和sequelize typescript对sequelize数据库调用进行单元测试,jestjs,sequelize.js,ts-jest,sequelize-typescript,Jestjs,Sequelize.js,Ts Jest,Sequelize Typescript,在对在数据库模型中创建记录的函数进行单元测试时,我遇到以下错误 Model not initialized: Member "create" cannot be called. "UserModel" needs to be added to a Sequelize instance. 我在上发现了与此相关的github问题 我尝试了使用validateOnly:true的解决方案,但它引入了另一个错误: this.lib.Database is not
Model not initialized: Member "create" cannot be called. "UserModel" needs to be added to a Sequelize instance.
我在上发现了与此相关的github问题
我尝试了使用validateOnly:true
的解决方案,但它引入了另一个错误:
this.lib.Database is not a constructor
模型类的外观如下所示:
@Table({ tableName: 'User' })
export class UserModel extends Model {
@AutoIncrement
@PrimaryKey
@Column(DataType.INTEGER)
public id: number;
@Unique
@AllowNull(false)
@Column(DataType.STRING(100))
public email!: string;
@AllowNull(false)
@Column(DataType.TEXT)
public password!: string;
}
我要测试的函数如下所示:
public async register(registerRequest: RegisterRequest) {
return UserModel.create({
email: registerRequest.email,
password: registerRequest.password
})
}
test('1# Register user', async () => {
const userService = new UserAccountService()
jest.spyOn(UserModel, 'create')
const registerRequest: RegisterRequest = {
email: 'abc@abc.com',
password: '1234'
}
const registeredUser = await userService.register(registerRequest);
expect(UserModel.create).toHaveBeenCalledTimes(1);
expect(registeredUser).toBeInstanceOf(UserModel);
expect(registeredUser.email).toEqual('abc@abc.com')
});
示例单元测试如下所示:
public async register(registerRequest: RegisterRequest) {
return UserModel.create({
email: registerRequest.email,
password: registerRequest.password
})
}
test('1# Register user', async () => {
const userService = new UserAccountService()
jest.spyOn(UserModel, 'create')
const registerRequest: RegisterRequest = {
email: 'abc@abc.com',
password: '1234'
}
const registeredUser = await userService.register(registerRequest);
expect(UserModel.create).toHaveBeenCalledTimes(1);
expect(registeredUser).toBeInstanceOf(UserModel);
expect(registeredUser.email).toEqual('abc@abc.com')
});
有人能帮助我如何使用这种sequelize数据库调用进行单元测试吗。我知道我们可以将
mockImplementationOnce()
或mockResolvedValue()
与假UserModel
对象一起使用,但是如果我在一个具有多个模型的函数中有很多数据库调用,那么模拟或创建所有假模型对象是非常烦人的,这会导致创建复杂和大型的测试用例,这显然是个坏兆头。是否有其他方法可以使用sequelize模型函数进行单元测试。我找到了以下解决方案:
我们可以创建假/模拟sequelize实例,并可以使用sqlite3包初始化所有模型。这对于单元测试和集成测试也是非常容易的。
由于如果我们模拟每个数据库调用,那么测试包含大量数据库调用的函数可能会非常繁琐,因此我们可以在没有任何数据库的情况下使用这个伪sequelize实例,并且可以在不引发任何错误或警告的情况下执行CRUD操作
describe('Testing', () => {
let mockedSequelize: Sequelize;
beforeEach(async () => {
mockedSequelize = new Sequelize({
database: '<any name>',
dialect: 'sqlite',
username: 'root',
password: '',
validateOnly: true,
models: [__dirname + '/models'],
});
await mockedSequelize.sync({ force: true });
})
afterEach(async () => {
jest.clearAllMocks();
await mockedSequelize.close();
})
test('1# Register user', async () => {
const userService = new UserAccountService()
jest.spyOn(UserModel, 'create')
const registerRequest: RegisterRequest = {
email: 'abc@abc.com',
password: '1234'
}
const registeredUser = await userService.register(registerRequest);
expect(UserModel.create).toHaveBeenCalledTimes(1);
expect(registeredUser).toBeInstanceOf(UserModel);
expect(registeredUser.email).toEqual('abc@abc.com')
});
});
description('Testing',()=>{
让mockedSequelize:Sequelize;
beforeach(异步()=>{
mockedSequelize=新的Sequelize({
数据库:“”,
方言:“sqlite”,
用户名:'根',
密码:“”,
真的,,
型号:[[uuuu dirname+'/models'],
});
wait mockedSequelize.sync({force:true});
})
每次之后(异步()=>{
开玩笑。clearAllMocks();
等待mockedSequelize.close();
})
测试('1#注册用户',异步()=>{
const userService=new UserAccountService()
spyOn(用户模型'create')
常量registerRequest:registerRequest={
电邮:'abc@abc.com',
密码:“1234”
}
const registeredUser=await userService.register(registerRequest);
expect(UserModel.create).tohavencalledtimes(1);
expect(registeredUser).toBeInstanceOf(UserModel);
expect(registeredUser.email).toEqual('abc@abc.com')
});
});
这可能会引发错误,因为找不到sqlite包。您可以安装sqlite3
包,然后开始测试