expeditavoluptas/tests/issues/GH3292.test.ts

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

import type { MikroORM } from '@mikro-orm/core';
import { initORMPostgreSql } from '../bootstrap';
import { Author2, Book2 } from '../entities-sql';

let orm: MikroORM;

beforeAll(async () => orm = await initORMPostgreSql());
beforeEach(async () => orm.schema.clearDatabase());
afterAll(async () => {
  await orm.schema.dropDatabase();
  await orm.close(true);
});

test('test findOne without a offset', async () => {
  const author = new Author2('Bartleby', 'bartelby@writer.org');
  const book = new Book2('My Life on The Wall, part 1', author);
  new Book2('My Life on The Wall, part 2', author);

  await orm.em.fork().persistAndFlush(author);

  const myBook = await orm.em.findOne(Book2, {});

  expect(myBook?.title).toEqual(book.title);
});

test('test findOne but with a offset', async () => {
  const author = new Author2('Bartleby', 'bartelby@writer.org');
  new Book2('My Life on The Wall, part 1', author);
  const book2 = new Book2('My Life on The Wall, part 2', author);

  await orm.em.fork().persistAndFlush(author);

  const myBook = await orm.em.findOne(Book2, {}, { offset: 1 });

  expect(myBook?.title).toEqual(book2.title);
});