import "reflect-metadata"
import {
    closeTestingConnections,
    createTestingConnections,
    reloadTestingDatabases,
} from "../../utils/test-utils"
import { DataSource } from "../../../src/data-source/DataSource"
import { Post } from "./entity/Post"
import { Category } from "./entity/Category"
import { expect } from "chai"

describe("github issues > #996 already loaded via query builder relations should not be loaded again when they are lazily loaded", () => {
    let connections: DataSource[]
    before(
        async () =>
            (connections = await createTestingConnections({
                entities: [__dirname + "/entity/*{.js,.ts}"],
                enabledDrivers: ["mysql"], // only one driver is enabled because this example uses lazy relations
            })),
    )
    beforeEach(() => reloadTestingDatabases(connections))
    after(() => closeTestingConnections(connections))

    it("should be able to find by object reference", () =>
        Promise.all(
            connections.map(async (connection) => {
                const category1 = new Category()
                category1.name = "Category #1"
                await connection.manager.save(category1)

                const category2 = new Category()
                category2.name = "Category #2"
                await connection.manager.save(category2)

                const post = new Post()
                post.title = "Post #1"
                post.categories = Promise.resolve([category1, category2])
                await connection.manager.save(post)

                const loadedPost = await connection.manager
                    .createQueryBuilder(Post, "post")
                    .leftJoinAndSelect("post.categories", "categories")
                    .getOne()

                expect(loadedPost).to.not.be.undefined
                const categories = await loadedPost!.categories
                categories.should.be.eql([
                    {
                        id: 1,
                        name: "Category #1",
                    },
                    {
                        id: 2,
                        name: "Category #2",
                    },
                ])
            }),
        ))
})
