public async Task Update_Book_Notes()
{
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.NotesOld.Should().Be("notes");
await BookHelpers.UpdateNotes(sut.Id, "You can always wish...");
await _fixture.Context.Entry(sut).ReloadAsync();
sut.NotesOld.Should().Contain("always wish");
sut.Id.Should().Be(bookId);
}