django/tests/model_enums/tests.py

import datetime
import decimal
import ipaddress
import uuid

from django.db import models
from django.template import Context, Template
from django.test import SimpleTestCase
from django.utils.deprecation import RemovedInDjango60Warning
from django.utils.functional import Promise
from django.utils.translation import gettext_lazy as _
from django.utils.version import PY311


class Suit(models.IntegerChoices):
    DIAMOND = 1, _("Diamond")
    SPADE = 2, _("Spade")
    HEART = 3, _("Heart")
    CLUB = 4, _("Club")


class YearInSchool(models.TextChoices):
    FRESHMAN = "FR", _("Freshman")
    SOPHOMORE = "SO", _("Sophomore")
    JUNIOR = "JR", _("Junior")
    SENIOR = "SR", _("Senior")
    GRADUATE = "GR", _("Graduate")


class Vehicle(models.IntegerChoices):
    CAR = 1, "Carriage"
    TRUCK = 2
    JET_SKI = 3

    __empty__ = _("(Unknown)")


class Gender(models.TextChoices):
    MALE = "M"
    FEMALE = "F"
    NOT_SPECIFIED = "X"

    __empty__ = "(Undeclared)"


class ChoicesTests(SimpleTestCase):
    def test_integerchoices(self):
        self.assertEqual(
            Suit.choices, [(1, "Diamond"), (2, "Spade"), (3, "Heart"), (4, "Club")]
        )
        self.assertEqual(Suit.labels, ["Diamond", "Spade", "Heart", "Club"])
        self.assertEqual(Suit.values, [1, 2, 3, 4])
        self.assertEqual(Suit.names, ["DIAMOND", "SPADE", "HEART", "CLUB"])

        self.assertEqual(repr(Suit.DIAMOND), "Suit.DIAMOND")
        self.assertEqual(Suit.DIAMOND.label, "Diamond")
        self.assertEqual(Suit.DIAMOND.value, 1)
        self.assertEqual(Suit["DIAMOND"], Suit.DIAMOND)
        self.assertEqual(Suit(1), Suit.DIAMOND)

        self.assertIsInstance(Suit, type(models.Choices))
        self.assertIsInstance(Suit.DIAMOND, Suit)
        self.assertIsInstance(Suit.DIAMOND.label, Promise)
        self.assertIsInstance(Suit.DIAMOND.value, int)

    def test_integerchoices_auto_label(self):
        self.assertEqual(Vehicle.CAR.label, "Carriage")
        self.assertEqual(Vehicle.TRUCK.label, "Truck")
        self.assertEqual(Vehicle.JET_SKI.label, "Jet Ski")

    def test_integerchoices_empty_label(self):
        self.assertEqual(Vehicle.choices[0], (None, "(Unknown)"))
        self.assertEqual(Vehicle.labels[0], "(Unknown)")
        self.assertIsNone(Vehicle.values[0])
        self.assertEqual(Vehicle.names[0], "__empty__")

    def test_integerchoices_functional_api(self):
        Place = models.IntegerChoices("Place", "FIRST SECOND THIRD")
        self.assertEqual(Place.labels, ["First", "Second", "Third"])
        self.assertEqual(Place.values, [1, 2, 3])
        self.assertEqual(Place.names, ["FIRST", "SECOND", "THIRD"])

    def test_integerchoices_containment(self):
        self.assertIn(Suit.DIAMOND, Suit)
        self.assertIn(1, Suit)
        self.assertNotIn(0, Suit)

    def test_textchoices(self):
        self.assertEqual(
            YearInSchool.choices,
            [
                ("FR", "Freshman"),
                ("SO", "Sophomore"),
                ("JR", "Junior"),
                ("SR", "Senior"),
                ("GR", "Graduate"),
            ],
        )
        self.assertEqual(
            YearInSchool.labels,
            ["Freshman", "Sophomore", "Junior", "Senior", "Graduate"],
        )
        self.assertEqual(YearInSchool.values, ["FR", "SO", "JR", "SR", "GR"])
        self.assertEqual(
            YearInSchool.names,
            ["FRESHMAN", "SOPHOMORE", "JUNIOR", "SENIOR", "GRADUATE"],
        )

        self.assertEqual(repr(YearInSchool.FRESHMAN), "YearInSchool.FRESHMAN")
        self.assertEqual(YearInSchool.FRESHMAN.label, "Freshman")
        self.assertEqual(YearInSchool.FRESHMAN.value, "FR")
        self.assertEqual(YearInSchool["FRESHMAN"], YearInSchool.FRESHMAN)
        self.assertEqual(YearInSchool("FR"), YearInSchool.FRESHMAN)

        self.assertIsInstance(YearInSchool, type(models.Choices))
        self.assertIsInstance(YearInSchool.FRESHMAN, YearInSchool)
        self.assertIsInstance(YearInSchool.FRESHMAN.label, Promise)
        self.assertIsInstance(YearInSchool.FRESHMAN.value, str)

    def test_textchoices_auto_label(self):
        self.assertEqual(Gender.MALE.label, "Male")
        self.assertEqual(Gender.FEMALE.label, "Female")
        self.assertEqual(Gender.NOT_SPECIFIED.label, "Not Specified")

    def test_textchoices_empty_label(self):
        self.assertEqual(Gender.choices[0], (None, "(Undeclared)"))
        self.assertEqual(Gender.labels[0], "(Undeclared)")
        self.assertIsNone(Gender.values[0])
        self.assertEqual(Gender.names[0], "__empty__")

    def test_textchoices_functional_api(self):
        Medal = models.TextChoices("Medal", "GOLD SILVER BRONZE")
        self.assertEqual(Medal.labels, ["Gold", "Silver", "Bronze"])
        self.assertEqual(Medal.values, ["GOLD", "SILVER", "BRONZE"])
        self.assertEqual(Medal.names, ["GOLD", "SILVER", "BRONZE"])

    def test_textchoices_containment(self):
        self.assertIn(YearInSchool.FRESHMAN, YearInSchool)
        self.assertIn("FR", YearInSchool)
        self.assertNotIn("XX", YearInSchool)

    def test_textchoices_blank_value(self):
        class BlankStr(models.TextChoices):
            EMPTY = "", "(Empty)"
            ONE = "ONE", "One"

        self.assertEqual(BlankStr.labels, ["(Empty)", "One"])
        self.assertEqual(BlankStr.values, ["", "ONE"])
        self.assertEqual(BlankStr.names, ["EMPTY", "ONE"])

    def test_invalid_definition(self):
        msg = "'str' object cannot be interpreted as an integer"
        with self.assertRaisesMessage(TypeError, msg):

            class InvalidArgumentEnum(models.IntegerChoices):
                # A string is not permitted as the second argument to int().
                ONE = 1, "X", "Invalid"

        msg = "duplicate values found in <enum 'Fruit'>: PINEAPPLE -> APPLE"
        with self.assertRaisesMessage(ValueError, msg):

            class Fruit(models.IntegerChoices):
                APPLE = 1, "Apple"
                PINEAPPLE = 1, "Pineapple"

    def test_str(self):
        for test in [Gender, Suit, YearInSchool, Vehicle]:
            for member in test:
                with self.subTest(member=member):
                    self.assertEqual(str(test[member.name]), str(member.value))

    def test_templates(self):
        template = Template("{{ Suit.DIAMOND.label }}|{{ Suit.DIAMOND.value }}")
        output = template.render(Context({"Suit": Suit}))
        self.assertEqual(output, "Diamond|1")

    def test_property_names_conflict_with_member_names(self):
        with self.assertRaises(AttributeError):
            models.TextChoices("Properties", "choices labels names values")

    def test_label_member(self):
        # label can be used as a member.
        Stationery = models.TextChoices("Stationery", "label stamp sticker")
        self.assertEqual(Stationery.label.label, "Label")
        self.assertEqual(Stationery.label.value, "label")
        self.assertEqual(Stationery.label.name, "label")

    def test_do_not_call_in_templates_member(self):
        # do_not_call_in_templates is not implicitly treated as a member.
        Special = models.IntegerChoices("Special", "do_not_call_in_templates")
        self.assertIn("do_not_call_in_templates", Special.__members__)
        self.assertEqual(
            Special.do_not_call_in_templates.label,
            "Do Not Call In Templates",
        )
        self.assertEqual(Special.do_not_call_in_templates.value, 1)
        self.assertEqual(
            Special.do_not_call_in_templates.name,
            "do_not_call_in_templates",
        )

    def test_do_not_call_in_templates_nonmember(self):
        self.assertNotIn("do_not_call_in_templates", Suit.__members__)
        if PY311:
            self.assertIs(Suit.do_not_call_in_templates, True)
        else:
            # Using @property on an enum does not behave as expected.
            self.assertTrue(Suit.do_not_call_in_templates)
            self.assertIsNot(Suit.do_not_call_in_templates, True)
            self.assertIsInstance(Suit.do_not_call_in_templates, property)


class Separator(bytes, models.Choices):
    FS = b"\x1c", "File Separator"
    GS = b"\x1d", "Group Separator"
    RS = b"\x1e", "Record Separator"
    US = b"\x1f", "Unit Separator"


class Constants(float, models.Choices):
    PI = 3.141592653589793, "π"
    TAU = 6.283185307179586, "τ"


class Set(frozenset, models.Choices):
    A = {1, 2}
    B = {2, 3}
    UNION = A | B
    DIFFERENCE = A - B
    INTERSECTION = A & B


class MoonLandings(datetime.date, models.Choices):
    APOLLO_11 = 1969, 7, 20, "Apollo 11 (Eagle)"
    APOLLO_12 = 1969, 11, 19, "Apollo 12 (Intrepid)"
    APOLLO_14 = 1971, 2, 5, "Apollo 14 (Antares)"
    APOLLO_15 = 1971, 7, 30, "Apollo 15 (Falcon)"
    APOLLO_16 = 1972, 4, 21, "Apollo 16 (Orion)"
    APOLLO_17 = 1972, 12, 11, "Apollo 17 (Challenger)"


class DateAndTime(datetime.datetime, models.Choices):
    A = 2010, 10, 10, 10, 10, 10
    B = 2011, 11, 11, 11, 11, 11
    C = 2012, 12, 12, 12, 12, 12


class MealTimes(datetime.time, models.Choices):
    BREAKFAST = 7, 0
    LUNCH = 13, 0
    DINNER = 18, 30


class Frequency(datetime.timedelta, models.Choices):
    WEEK = 0, 0, 0, 0, 0, 0, 1, "Week"
    DAY = 1, "Day"
    HOUR = 0, 0, 0, 0, 0, 1, "Hour"
    MINUTE = 0, 0, 0, 0, 1, "Hour"
    SECOND = 0, 1, "Second"


class Number(decimal.Decimal, models.Choices):
    E = 2.718281828459045, "e"
    PI = "3.141592653589793", "π"
    TAU = decimal.Decimal("6.283185307179586"), "τ"


class IPv4Address(ipaddress.IPv4Address, models.Choices):
    LOCALHOST = "127.0.0.1", "Localhost"
    GATEWAY = "192.168.0.1", "Gateway"
    BROADCAST = "192.168.0.255", "Broadcast"


class IPv6Address(ipaddress.IPv6Address, models.Choices):
    LOCALHOST = "::1", "Localhost"
    UNSPECIFIED = "::", "Unspecified"


class IPv4Network(ipaddress.IPv4Network, models.Choices):
    LOOPBACK = "127.0.0.0/8", "Loopback"
    LINK_LOCAL = "169.254.0.0/16", "Link-Local"
    PRIVATE_USE_A = "10.0.0.0/8", "Private-Use (Class A)"


class IPv6Network(ipaddress.IPv6Network, models.Choices):
    LOOPBACK = "::1/128", "Loopback"
    UNSPECIFIED = "::/128", "Unspecified"
    UNIQUE_LOCAL = "fc00::/7", "Unique-Local"
    LINK_LOCAL_UNICAST = "fe80::/10", "Link-Local Unicast"


class CustomChoicesTests(SimpleTestCase):
    def test_labels_valid(self):
        enums = (
            Separator,
            Constants,
            Set,
            MoonLandings,
            DateAndTime,
            MealTimes,
            Frequency,
            Number,
            IPv4Address,
            IPv6Address,
            IPv4Network,
            IPv6Network,
        )
        for choice_enum in enums:
            with self.subTest(choice_enum.__name__):
                self.assertNotIn(None, choice_enum.labels)

    def test_bool_unsupported(self):
        msg = "type 'bool' is not an acceptable base type"
        with self.assertRaisesMessage(TypeError, msg):

            class Boolean(bool, models.Choices):
                pass

    def test_uuid_unsupported(self):
        with self.assertRaises(TypeError):

            class Identifier(uuid.UUID, models.Choices):
                A = "972ce4eb-a95f-4a56-9339-68c208a76f18"


class ChoicesMetaDeprecationTests(SimpleTestCase):
    def test_deprecation_warning(self):
        from django.db.models import enums

        msg = "ChoicesMeta is deprecated in favor of ChoicesType."
        with self.assertWarnsMessage(RemovedInDjango60Warning, msg) as ctx:
            enums.ChoicesMeta
        self.assertEqual(ctx.filename, __file__)