public async Task Update_Book_ReleaseYear()
{
var book = await BookHelpers.CreateValidBookWithAllProperties();
var repository = new BookRepository(_fixture.Context);
(await repository.ExistsAsync(book.Id)).Should().BeTrue();
var sut = await repository.GetAsync(book.Id);
var bookId = sut.Id;
sut.Should().NotBeNull();
sut.ReleaseYear.Should().Be(2019);
await BookHelpers.UpdateReleaseYear(sut.Id, 1920);
await _fixture.Context.Entry(sut).ReloadAsync();
sut.ReleaseYear.Should().Be(1920);
sut.Id.Should().Be(bookId);
}