def test_save_update_changes_to_db(self):
bk = Book(author='CCC', title='DDD', read=True)
bk.save()
# Change some attributes and save
bk.author = 'EEE'
bk.title = 'FFF'
bk.read = False
bk.save()
# Check DB has same data as bk Book object
self.assertEqual(bk, bookstore.get_book_by_id(bk.id))
self.assertTrue(bk, bookstore.exact_match(bk))
