# Copyright (c) Microsoft Corporation.
# Licensed under the BSD license.
from unittest import skipUnless

from django import VERSION
from django.test import TestCase
from django.db import connection
from django.test.utils import CaptureQueriesContext

from ..models import Book, Publisher

DJANGO42 = VERSION >= (4, 2)

# Copied from Django test suite but modified to test our code
@skipUnless(DJANGO42, "Django 4.2 specific tests")
class UpdateOrCreateTests(TestCase):

    def test_update_only_defaults_and_pre_save_fields_when_local_fields(self):
        publisher = Publisher.objects.create(name="Acme Publishing")
        book = Book.objects.create(publisher=publisher, name="The Book of Ed & Fred")

        for defaults in [{"publisher": publisher}, {"publisher_id": publisher}]:
            with self.subTest(defaults=defaults):
                with CaptureQueriesContext(connection) as captured_queries:
                    book, created = Book.objects.update_or_create(
                        pk=book.pk,
                        defaults=defaults,
                    )
                self.assertIs(created, False)
                update_sqls = [
                    q["sql"] for q in captured_queries if "UPDATE" in q["sql"]
                ]
                self.assertEqual(len(update_sqls), 1)
                update_sql = update_sqls[0]
                self.assertIsNotNone(update_sql)
                self.assertIn(
                    connection.ops.quote_name("publisher_id_column"), update_sql
                )
                self.assertIn(connection.ops.quote_name("updated"), update_sql)
                # Name should not be updated.
                self.assertNotIn(connection.ops.quote_name("name"), update_sql)