public async Task Remove_Book()
{
var book = await BookHelpers.CreateValidBookWithAllProperties();
var repository = new BookRepository(_fixture.Context);
(await repository.ExistsAsync(book.Id)).Should().BeTrue();
await BookHelpers.RemoveBook(book.Id);
var sut = await repository.GetAsync(book.Id);
await _fixture.Context.Entry(sut).ReloadAsync();
(await repository.ExistsAsync(book.Id)).Should().BeFalse();
}