export class Author {
    @Column()
    name: string

    @OneToOne(() => Profile)
    @JoinColumn()
    profile: Promise<Profile>
}

@Entity()
export class Post {
    @PrimaryGeneratedColumn()
    id: number

    @Column()
    title: string

    @Column(() => Author)
    author: Author
}

@Entity()
export class Profile {
    @PrimaryGeneratedColumn()
    id: number

    @Column()
    about: string
}

it("should lazy load embedded relations", () =>
        Promise.all(
            dataSources.map(async (dataSource) => {
                const profile = new Profile()
                profile.about = "I am John Doe profile"
                await dataSource.manager.save(profile)

                const post = new Post()
                post.title = "Post with embedded author"
                post.author = new Author()
                post.author.name = "John Doe"
                post.author.profile = Promise.resolve(profile)
                await dataSource.manager.save(post)

                const loadedPost = await dataSource.manager.findOne(Post, {
                    where: { title: "Post with embedded author" },
                })

                const lazyLoadedProfile = await loadedPost!.author.profile
                lazyLoadedProfile.about.should.be.equal("I am John Doe profile")

                const loadedPostForCreate = await dataSource.manager.findOne(
                    Post,
                    {
                        where: { title: "Post with embedded author" },
                    },
                )
            }),
        ))