import 'reflect-metadata';
import {
	closeTestingConnections,
	createTestingConnections,
	reloadTestingDatabases,
} from '../../utils/test-utils';
import { DataSource } from '../../../src/data-source/DataSource';
import { TestEntity1 } from './entity/TestEntity1';

describe('github issues > #1504 Cannot eagerly query Entity with relation more than 3 levels deep', () => {
	let connections: DataSource[];
	before(
		async () =>
			(connections = await createTestingConnections({
				entities: [__dirname + '/entity/*{.js,.ts}'],
				enabledDrivers: ['postgres'],
			})),
	);
	beforeEach(() => reloadTestingDatabases(connections));
	after(() => closeTestingConnections(connections));

	it('should not throw an error', () =>
		Promise.all(
			connections.map(async (connection) => {
				await connection.getRepository(TestEntity1).findOne({
					where: {
						id: 1,
					},
					relations: {
						Entity2: {
							Entity3: {
								Entity4: true,
							},
						},
					},
				});
			}),
		));
});