from django.db import connection

from django.db.models import CharField

from django.db.models.functions import SHA1

from django.test import TestCase

from django.test.utils import register_lookup

from ..models import Author

class SHA1Tests(TestCase):

    @classmethod

    def setUpTestData(cls):

        Author.objects.bulk_create(

            [

                Author(alias="John Smith"),

                Author(alias="Jordan Élena"),

                Author(alias="皇帝"),

                Author(alias=""),

                Author(alias=None),

            ]

        )

    def test_basic(self):

        authors = (

            Author.objects.annotate(

                sha1_alias=SHA1("alias"),

            )

            .values_list("sha1_alias", flat=True)

            .order_by("pk")

        )

        self.assertSequenceEqual(

            authors,

            [

                "e61a3587b3f7a142b8c7b9263c82f8119398ecb7",

                "0781e0745a2503e6ded05ed5bc554c421d781b0c",

                "198d15ea139de04060caf95bc3e0ec5883cba881",

                "da39a3ee5e6b4b0d3255bfef95601890afd80709",

                "da39a3ee5e6b4b0d3255bfef95601890afd80709"

                if connection.features.interprets_empty_strings_as_nulls

                else None,

            ],

        )

    def test_transform(self):

        with register_lookup(CharField, SHA1):

            authors = Author.objects.filter(

                alias__sha1="e61a3587b3f7a142b8c7b9263c82f8119398ecb7",

            ).values_list("alias", flat=True)

            self.assertSequenceEqual(authors, ["John Smith"])