//------------------------------------------------------------------------
//helper methods
private static IStatusGeneric <Book> AddBookWithNewAuthor(DddContext context, string title = "Test")
{
var status = Book.CreateBook(title, new DateTime(2019, 12, 31),
123, new List <Author> {
new Author("Author1", "*****@*****.**")
});
status.IsValid.ShouldBeTrue(status.GetAllErrors());
context.Add(status.Result);
context.SaveChanges();
return(status);
}
