How can I implement seeding in TypeORM for integration tests?

How can I implement seeding in TypeORM for integration tests?

To implement seeding in TypeORM for integration tests, you can create a seeder class that populates your database with test data.

What should I include in my seeder class?

Your seeder class should include methods to create and save entities, and you can use the TypeORM repository to handle database operations.

Can you give me an example of a seeder class?

Sure! Here's a simple example:

import { Connection } from 'typeorm';
import { User } from './entity/User';

export class UserSeeder {
    constructor(private connection: Connection) {}

    async seed() {
        const user = this.connection.getRepository(User);
        await user.save({ name: 'John Doe', email: '[email protected]' });
    }
}

How do I run the seeder before my tests?

You can call the seeder's seed method in a beforeEach or beforeAll hook in your test suite to ensure the database is populated before tests run.