def test_add_book_equals_isbn(self):
#given
book1 = Book()
book2 = Book()
#when
book1.title = "What's up?"
book1.ISBN = "123123123123"
book1.save()
book2.title = "What's up?"
book2.ISBN = "123123123123"
book2.save()
#then
books_by_ISBN = Book.objects.filter(ISBN="123123123123")
self.assertEqual(len(books_by_ISBN), 1)
def test_add_book_ISBN(self):
#given
book = Book()
#when
book.title = "What's up?"
book.ISBN = " 123-123-123-123 "
book.save()
#then
book_by_isbn = Book.objects.filter(ISBN = "123123123123")
self.assertEqual(len(book_by_isbn), 1)
def test_add_book(self):
#given
book = Book()
#when
book.title = "What's up?"
book.ISBN = "123123123123"
book.save()
#then
all_books = Book.objects.all()
self.assertEqual(len(all_books), 1)
book_db = all_books[0]
self.assertEqual(book_db, book)
self.assertEqual(book_db.title, "What's up?")
self.assertEqual(book_db.ISBN, "123123123123")
