def test_delete_book(self, patched_query, patched_session):
mock_filter_by = Mock()
patched_query.filter_by.return_value = mock_filter_by
mock_filter_by.delete.return_value = True
isbn = 'fake_isbn'
Book.delete_book(isbn)
patched_query.filter_by.assert_called_with(isbn=isbn)
mock_filter_by.delete.assert_called_once()
patched_session.commit.assert_called_once()
def delete_book(isbn):
if not Book.delete_book(isbn):
abort(
404,
"Book with ISBN number provided not found, so unable to delete.")
return jsonify(dict()), 204
