import enum import inspect import pydoc import sys import unittest import threading from collections import OrderedDict from enum import Enum, IntEnum, EnumMeta, Flag, IntFlag, unique, auto from io import StringIO from pickle import dumps, loads, PicklingError, HIGHEST_PROTOCOL from test.support import ALWAYS_EQ, check__all__, threading_helper from datetime import timedelta python_version = sys.version_info[:2] # for pickle tests try: class Stooges(Enum): LARRY = 1 CURLY = 2 MOE = 3 except Exception as exc: Stooges = exc try: class IntStooges(int, Enum): LARRY = 1 CURLY = 2 MOE = 3 except Exception as exc: IntStooges = exc try: class FloatStooges(float, Enum): LARRY = 1.39 CURLY = 2.72 MOE = 3.142596 except Exception as exc: FloatStooges = exc try: class FlagStooges(Flag): LARRY = 1 CURLY = 2 MOE = 3 except Exception as exc: FlagStooges = exc # for pickle test and subclass tests try: class StrEnum(str, Enum): 'accepts only string values' class Name(StrEnum): BDFL = 'Guido van Rossum' FLUFL = 'Barry Warsaw' except Exception as exc: Name = exc try: Question = Enum('Question', 'who what when where why', module=__name__) except Exception as exc: Question = exc try: Answer = Enum('Answer', 'him this then there because') except Exception as exc: Answer = exc try: Theory = Enum('Theory', 'rule law supposition', qualname='spanish_inquisition') except Exception as exc: Theory = exc # for doctests try: class Fruit(Enum): TOMATO = 1 BANANA = 2 CHERRY = 3 except Exception: pass def test_pickle_dump_load(assertion, source, target=None): if target is None: target = source for protocol in range(HIGHEST_PROTOCOL + 1): assertion(loads(dumps(source, protocol=protocol)), target) def test_pickle_exception(assertion, exception, obj): for protocol in range(HIGHEST_PROTOCOL + 1): with assertion(exception): dumps(obj, protocol=protocol) class TestHelpers(unittest.TestCase): # _is_descriptor, _is_sunder, _is_dunder def test_is_descriptor(self): class foo: pass for attr in ('__get__','__set__','__delete__'): obj = foo() self.assertFalse(enum._is_descriptor(obj)) setattr(obj, attr, 1) self.assertTrue(enum._is_descriptor(obj)) def test_is_sunder(self): for s in ('_a_', '_aa_'): self.assertTrue(enum._is_sunder(s)) for s in ('a', 'a_', '_a', '__a', 'a__', '__a__', '_a__', '__a_', '_', '__', '___', '____', '_____',): self.assertFalse(enum._is_sunder(s)) def test_is_dunder(self): for s in ('__a__', '__aa__'): self.assertTrue(enum._is_dunder(s)) for s in ('a', 'a_', '_a', '__a', 'a__', '_a_', '_a__', '__a_', '_', '__', '___', '____', '_____',): self.assertFalse(enum._is_dunder(s)) # for subclassing tests class classproperty: def __init__(self, fget=None, fset=None, fdel=None, doc=None): self.fget = fget self.fset = fset self.fdel = fdel if doc is None and fget is not None: doc = fget.__doc__ self.__doc__ = doc def __get__(self, instance, ownerclass): return self.fget(ownerclass) # tests class TestEnum(unittest.TestCase): def setUp(self): class Season(Enum): SPRING = 1 SUMMER = 2 AUTUMN = 3 WINTER = 4 self.Season = Season class Konstants(float, Enum): E = 2.7182818 PI = 3.1415926 TAU = 2 * PI self.Konstants = Konstants class Grades(IntEnum): A = 5 B = 4 C = 3 D = 2 F = 0 self.Grades = Grades class Directional(str, Enum): EAST = 'east' WEST = 'west' NORTH = 'north' SOUTH = 'south' self.Directional = Directional from datetime import date class Holiday(date, Enum): NEW_YEAR = 2013, 1, 1 IDES_OF_MARCH = 2013, 3, 15 self.Holiday = Holiday def test_dir_on_class(self): Season = self.Season self.assertEqual( set(dir(Season)), set(['__class__', '__doc__', '__members__', '__module__', 'SPRING', 'SUMMER', 'AUTUMN', 'WINTER']), ) def test_dir_on_item(self): Season = self.Season self.assertEqual( set(dir(Season.WINTER)), set(['__class__', '__doc__', '__module__', 'name', 'value']), ) def test_dir_with_added_behavior(self): class Test(Enum): this = 'that' these = 'those' def wowser(self): return ("Wowser! I'm %s!" % self.name) self.assertEqual( set(dir(Test)), set(['__class__', '__doc__', '__members__', '__module__', 'this', 'these']), ) self.assertEqual( set(dir(Test.this)), set(['__class__', '__doc__', '__module__', 'name', 'value', 'wowser']), ) def test_dir_on_sub_with_behavior_on_super(self): # see issue22506 class SuperEnum(Enum): def invisible(self): return "did you see me?" class SubEnum(SuperEnum): sample = 5 self.assertEqual( set(dir(SubEnum.sample)), set(['__class__', '__doc__', '__module__', 'name', 'value', 'invisible']), ) def test_dir_on_sub_with_behavior_including_instance_dict_on_super(self): # see issue40084 class SuperEnum(IntEnum): def __new__(cls, value, description=""): obj = int.__new__(cls, value) obj._value_ = value obj.description = description return obj class SubEnum(SuperEnum): sample = 5 self.assertTrue({'description'} <= set(dir(SubEnum.sample))) def test_enum_in_enum_out(self): Season = self.Season self.assertIs(Season(Season.WINTER), Season.WINTER) def test_enum_value(self): Season = self.Season self.assertEqual(Season.SPRING.value, 1) def test_intenum_value(self): self.assertEqual(IntStooges.CURLY.value, 2) def test_enum(self): Season = self.Season lst = list(Season) self.assertEqual(len(lst), len(Season)) self.assertEqual(len(Season), 4, Season) self.assertEqual( [Season.SPRING, Season.SUMMER, Season.AUTUMN, Season.WINTER], lst) for i, season in enumerate('SPRING SUMMER AUTUMN WINTER'.split(), 1): e = Season(i) self.assertEqual(e, getattr(Season, season)) self.assertEqual(e.value, i) self.assertNotEqual(e, i) self.assertEqual(e.name, season) self.assertIn(e, Season) self.assertIs(type(e), Season) self.assertIsInstance(e, Season) self.assertEqual(str(e), 'Season.' + season) self.assertEqual( repr(e), ''.format(season, i), ) def test_value_name(self): Season = self.Season self.assertEqual(Season.SPRING.name, 'SPRING') self.assertEqual(Season.SPRING.value, 1) with self.assertRaises(AttributeError): Season.SPRING.name = 'invierno' with self.assertRaises(AttributeError): Season.SPRING.value = 2 def test_changing_member(self): Season = self.Season with self.assertRaises(AttributeError): Season.WINTER = 'really cold' def test_attribute_deletion(self): class Season(Enum): SPRING = 1 SUMMER = 2 AUTUMN = 3 WINTER = 4 def spam(cls): pass self.assertTrue(hasattr(Season, 'spam')) del Season.spam self.assertFalse(hasattr(Season, 'spam')) with self.assertRaises(AttributeError): del Season.SPRING with self.assertRaises(AttributeError): del Season.DRY with self.assertRaises(AttributeError): del Season.SPRING.name def test_bool_of_class(self): class Empty(Enum): pass self.assertTrue(bool(Empty)) def test_bool_of_member(self): class Count(Enum): zero = 0 one = 1 two = 2 for member in Count: self.assertTrue(bool(member)) def test_invalid_names(self): with self.assertRaises(ValueError): class Wrong(Enum): mro = 9 with self.assertRaises(ValueError): class Wrong(Enum): _create_= 11 with self.assertRaises(ValueError): class Wrong(Enum): _get_mixins_ = 9 with self.assertRaises(ValueError): class Wrong(Enum): _find_new_ = 1 with self.assertRaises(ValueError): class Wrong(Enum): _any_name_ = 9 def test_bool(self): # plain Enum members are always True class Logic(Enum): true = True false = False self.assertTrue(Logic.true) self.assertTrue(Logic.false) # unless overridden class RealLogic(Enum): true = True false = False def __bool__(self): return bool(self._value_) self.assertTrue(RealLogic.true) self.assertFalse(RealLogic.false) # mixed Enums depend on mixed-in type class IntLogic(int, Enum): true = 1 false = 0 self.assertTrue(IntLogic.true) self.assertFalse(IntLogic.false) @unittest.skipIf( python_version >= (3, 12), '__contains__ now returns True/False for all inputs', ) def test_contains_er(self): Season = self.Season self.assertIn(Season.AUTUMN, Season) with self.assertRaises(TypeError): with self.assertWarns(DeprecationWarning): 3 in Season with self.assertRaises(TypeError): with self.assertWarns(DeprecationWarning): 'AUTUMN' in Season val = Season(3) self.assertIn(val, Season) # class OtherEnum(Enum): one = 1; two = 2 self.assertNotIn(OtherEnum.two, Season) @unittest.skipIf( python_version < (3, 12), '__contains__ only works with enum memmbers before 3.12', ) def test_contains_tf(self): Season = self.Season self.assertIn(Season.AUTUMN, Season) self.assertTrue(3 in Season) self.assertFalse('AUTUMN' in Season) val = Season(3) self.assertIn(val, Season) # class OtherEnum(Enum): one = 1; two = 2 self.assertNotIn(OtherEnum.two, Season) def test_comparisons(self): Season = self.Season with self.assertRaises(TypeError): Season.SPRING < Season.WINTER with self.assertRaises(TypeError): Season.SPRING > 4 self.assertNotEqual(Season.SPRING, 1) class Part(Enum): SPRING = 1 CLIP = 2 BARREL = 3 self.assertNotEqual(Season.SPRING, Part.SPRING) with self.assertRaises(TypeError): Season.SPRING < Part.CLIP def test_enum_duplicates(self): class Season(Enum): SPRING = 1 SUMMER = 2 AUTUMN = FALL = 3 WINTER = 4 ANOTHER_SPRING = 1 lst = list(Season) self.assertEqual( lst, [Season.SPRING, Season.SUMMER, Season.AUTUMN, Season.WINTER, ]) self.assertIs(Season.FALL, Season.AUTUMN) self.assertEqual(Season.FALL.value, 3) self.assertEqual(Season.AUTUMN.value, 3) self.assertIs(Season(3), Season.AUTUMN) self.assertIs(Season(1), Season.SPRING) self.assertEqual(Season.FALL.name, 'AUTUMN') self.assertEqual( [k for k,v in Season.__members__.items() if v.name != k], ['FALL', 'ANOTHER_SPRING'], ) def test_duplicate_name(self): with self.assertRaises(TypeError): class Color(Enum): red = 1 green = 2 blue = 3 red = 4 with self.assertRaises(TypeError): class Color(Enum): red = 1 green = 2 blue = 3 def red(self): return 'red' with self.assertRaises(TypeError): class Color(Enum): @property def red(self): return 'redder' red = 1 green = 2 blue = 3 def test_enum_with_value_name(self): class Huh(Enum): name = 1 value = 2 self.assertEqual( list(Huh), [Huh.name, Huh.value], ) self.assertIs(type(Huh.name), Huh) self.assertEqual(Huh.name.name, 'name') self.assertEqual(Huh.name.value, 1) def test_format_enum(self): Season = self.Season self.assertEqual('{}'.format(Season.SPRING), '{}'.format(str(Season.SPRING))) self.assertEqual( '{:}'.format(Season.SPRING), '{:}'.format(str(Season.SPRING))) self.assertEqual('{:20}'.format(Season.SPRING), '{:20}'.format(str(Season.SPRING))) self.assertEqual('{:^20}'.format(Season.SPRING), '{:^20}'.format(str(Season.SPRING))) self.assertEqual('{:>20}'.format(Season.SPRING), '{:>20}'.format(str(Season.SPRING))) self.assertEqual('{:<20}'.format(Season.SPRING), '{:<20}'.format(str(Season.SPRING))) def test_str_override_enum(self): class EnumWithStrOverrides(Enum): one = auto() two = auto() def __str__(self): return 'Str!' self.assertEqual(str(EnumWithStrOverrides.one), 'Str!') self.assertEqual('{}'.format(EnumWithStrOverrides.one), 'Str!') def test_format_override_enum(self): class EnumWithFormatOverride(Enum): one = 1.0 two = 2.0 def __format__(self, spec): return 'Format!!' self.assertEqual(str(EnumWithFormatOverride.one), 'EnumWithFormatOverride.one') self.assertEqual('{}'.format(EnumWithFormatOverride.one), 'Format!!') def test_str_and_format_override_enum(self): class EnumWithStrFormatOverrides(Enum): one = auto() two = auto() def __str__(self): return 'Str!' def __format__(self, spec): return 'Format!' self.assertEqual(str(EnumWithStrFormatOverrides.one), 'Str!') self.assertEqual('{}'.format(EnumWithStrFormatOverrides.one), 'Format!') def test_str_override_mixin(self): class MixinEnumWithStrOverride(float, Enum): one = 1.0 two = 2.0 def __str__(self): return 'Overridden!' self.assertEqual(str(MixinEnumWithStrOverride.one), 'Overridden!') self.assertEqual('{}'.format(MixinEnumWithStrOverride.one), 'Overridden!') def test_str_and_format_override_mixin(self): class MixinWithStrFormatOverrides(float, Enum): one = 1.0 two = 2.0 def __str__(self): return 'Str!' def __format__(self, spec): return 'Format!' self.assertEqual(str(MixinWithStrFormatOverrides.one), 'Str!') self.assertEqual('{}'.format(MixinWithStrFormatOverrides.one), 'Format!') def test_format_override_mixin(self): class TestFloat(float, Enum): one = 1.0 two = 2.0 def __format__(self, spec): return 'TestFloat success!' self.assertEqual(str(TestFloat.one), 'TestFloat.one') self.assertEqual('{}'.format(TestFloat.one), 'TestFloat success!') def assertFormatIsValue(self, spec, member): self.assertEqual(spec.format(member), spec.format(member.value)) def test_format_enum_date(self): Holiday = self.Holiday self.assertFormatIsValue('{}', Holiday.IDES_OF_MARCH) self.assertFormatIsValue('{:}', Holiday.IDES_OF_MARCH) self.assertFormatIsValue('{:20}', Holiday.IDES_OF_MARCH) self.assertFormatIsValue('{:^20}', Holiday.IDES_OF_MARCH) self.assertFormatIsValue('{:>20}', Holiday.IDES_OF_MARCH) self.assertFormatIsValue('{:<20}', Holiday.IDES_OF_MARCH) self.assertFormatIsValue('{:%Y %m}', Holiday.IDES_OF_MARCH) self.assertFormatIsValue('{:%Y %m %M:00}', Holiday.IDES_OF_MARCH) def test_format_enum_float(self): Konstants = self.Konstants self.assertFormatIsValue('{}', Konstants.TAU) self.assertFormatIsValue('{:}', Konstants.TAU) self.assertFormatIsValue('{:20}', Konstants.TAU) self.assertFormatIsValue('{:^20}', Konstants.TAU) self.assertFormatIsValue('{:>20}', Konstants.TAU) self.assertFormatIsValue('{:<20}', Konstants.TAU) self.assertFormatIsValue('{:n}', Konstants.TAU) self.assertFormatIsValue('{:5.2}', Konstants.TAU) self.assertFormatIsValue('{:f}', Konstants.TAU) def test_format_enum_int(self): Grades = self.Grades self.assertFormatIsValue('{}', Grades.C) self.assertFormatIsValue('{:}', Grades.C) self.assertFormatIsValue('{:20}', Grades.C) self.assertFormatIsValue('{:^20}', Grades.C) self.assertFormatIsValue('{:>20}', Grades.C) self.assertFormatIsValue('{:<20}', Grades.C) self.assertFormatIsValue('{:+}', Grades.C) self.assertFormatIsValue('{:08X}', Grades.C) self.assertFormatIsValue('{:b}', Grades.C) def test_format_enum_str(self): Directional = self.Directional self.assertFormatIsValue('{}', Directional.WEST) self.assertFormatIsValue('{:}', Directional.WEST) self.assertFormatIsValue('{:20}', Directional.WEST) self.assertFormatIsValue('{:^20}', Directional.WEST) self.assertFormatIsValue('{:>20}', Directional.WEST) self.assertFormatIsValue('{:<20}', Directional.WEST) def test_object_str_override(self): class Colors(Enum): RED, GREEN, BLUE = 1, 2, 3 def __repr__(self): return "test.%s" % (self._name_, ) __str__ = object.__str__ self.assertEqual(str(Colors.RED), 'test.RED') def test_enum_str_override(self): class MyStrEnum(Enum): def __str__(self): return 'MyStr' class MyMethodEnum(Enum): def hello(self): return 'Hello! My name is %s' % self.name class Test1Enum(MyMethodEnum, int, MyStrEnum): One = 1 Two = 2 self.assertTrue(Test1Enum._member_type_ is int) self.assertEqual(str(Test1Enum.One), 'MyStr') self.assertEqual(format(Test1Enum.One, ''), 'MyStr') # class Test2Enum(MyStrEnum, MyMethodEnum): One = 1 Two = 2 self.assertEqual(str(Test2Enum.One), 'MyStr') self.assertEqual(format(Test1Enum.One, ''), 'MyStr') def test_inherited_data_type(self): class HexInt(int): __qualname__ = 'HexInt' def __repr__(self): return hex(self) class MyEnum(HexInt, enum.Enum): __qualname__ = 'MyEnum' A = 1 B = 2 C = 3 self.assertEqual(repr(MyEnum.A), '') globals()['HexInt'] = HexInt globals()['MyEnum'] = MyEnum test_pickle_dump_load(self.assertIs, MyEnum.A) test_pickle_dump_load(self.assertIs, MyEnum) # class SillyInt(HexInt): __qualname__ = 'SillyInt' pass class MyOtherEnum(SillyInt, enum.Enum): __qualname__ = 'MyOtherEnum' D = 4 E = 5 F = 6 self.assertIs(MyOtherEnum._member_type_, SillyInt) globals()['SillyInt'] = SillyInt globals()['MyOtherEnum'] = MyOtherEnum test_pickle_dump_load(self.assertIs, MyOtherEnum.E) test_pickle_dump_load(self.assertIs, MyOtherEnum) # class BrokenInt(int): __qualname__ = 'BrokenInt' def __new__(cls, value): return int.__new__(cls, value) class MyBrokenEnum(BrokenInt, Enum): __qualname__ = 'MyBrokenEnum' G = 7 H = 8 I = 9 self.assertIs(MyBrokenEnum._member_type_, BrokenInt) self.assertIs(MyBrokenEnum(7), MyBrokenEnum.G) globals()['BrokenInt'] = BrokenInt globals()['MyBrokenEnum'] = MyBrokenEnum test_pickle_exception(self.assertRaises, TypeError, MyBrokenEnum.G) test_pickle_exception(self.assertRaises, PicklingError, MyBrokenEnum) def test_too_many_data_types(self): with self.assertRaisesRegex(TypeError, 'too many data types'): class Huh(str, int, Enum): One = 1 class MyStr(str): def hello(self): return 'hello, %s' % self class MyInt(int): def repr(self): return hex(self) with self.assertRaisesRegex(TypeError, 'too many data types'): class Huh(MyStr, MyInt, Enum): One = 1 def test_hash(self): Season = self.Season dates = {} dates[Season.WINTER] = '1225' dates[Season.SPRING] = '0315' dates[Season.SUMMER] = '0704' dates[Season.AUTUMN] = '1031' self.assertEqual(dates[Season.AUTUMN], '1031') def test_intenum_from_scratch(self): class phy(int, Enum): pi = 3 tau = 2 * pi self.assertTrue(phy.pi < phy.tau) def test_intenum_inherited(self): class IntEnum(int, Enum): pass class phy(IntEnum): pi = 3 tau = 2 * pi self.assertTrue(phy.pi < phy.tau) def test_floatenum_from_scratch(self): class phy(float, Enum): pi = 3.1415926 tau = 2 * pi self.assertTrue(phy.pi < phy.tau) def test_floatenum_inherited(self): class FloatEnum(float, Enum): pass class phy(FloatEnum): pi = 3.1415926 tau = 2 * pi self.assertTrue(phy.pi < phy.tau) def test_strenum_from_scratch(self): class phy(str, Enum): pi = 'Pi' tau = 'Tau' self.assertTrue(phy.pi < phy.tau) def test_strenum_inherited(self): class StrEnum(str, Enum): pass class phy(StrEnum): pi = 'Pi' tau = 'Tau' self.assertTrue(phy.pi < phy.tau) def test_intenum(self): class WeekDay(IntEnum): SUNDAY = 1 MONDAY = 2 TUESDAY = 3 WEDNESDAY = 4 THURSDAY = 5 FRIDAY = 6 SATURDAY = 7 self.assertEqual(['a', 'b', 'c'][WeekDay.MONDAY], 'c') self.assertEqual([i for i in range(WeekDay.TUESDAY)], [0, 1, 2]) lst = list(WeekDay) self.assertEqual(len(lst), len(WeekDay)) self.assertEqual(len(WeekDay), 7) target = 'SUNDAY MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY' target = target.split() for i, weekday in enumerate(target, 1): e = WeekDay(i) self.assertEqual(e, i) self.assertEqual(int(e), i) self.assertEqual(e.name, weekday) self.assertIn(e, WeekDay) self.assertEqual(lst.index(e)+1, i) self.assertTrue(0 < e < 8) self.assertIs(type(e), WeekDay) self.assertIsInstance(e, int) self.assertIsInstance(e, Enum) def test_intenum_duplicates(self): class WeekDay(IntEnum): SUNDAY = 1 MONDAY = 2 TUESDAY = TEUSDAY = 3 WEDNESDAY = 4 THURSDAY = 5 FRIDAY = 6 SATURDAY = 7 self.assertIs(WeekDay.TEUSDAY, WeekDay.TUESDAY) self.assertEqual(WeekDay(3).name, 'TUESDAY') self.assertEqual([k for k,v in WeekDay.__members__.items() if v.name != k], ['TEUSDAY', ]) def test_intenum_from_bytes(self): self.assertIs(IntStooges.from_bytes(b'\x00\x03', 'big'), IntStooges.MOE) with self.assertRaises(ValueError): IntStooges.from_bytes(b'\x00\x05', 'big') def test_floatenum_fromhex(self): h = float.hex(FloatStooges.MOE.value) self.assertIs(FloatStooges.fromhex(h), FloatStooges.MOE) h = float.hex(FloatStooges.MOE.value + 0.01) with self.assertRaises(ValueError): FloatStooges.fromhex(h) def test_pickle_enum(self): if isinstance(Stooges, Exception): raise Stooges test_pickle_dump_load(self.assertIs, Stooges.CURLY) test_pickle_dump_load(self.assertIs, Stooges) def test_pickle_int(self): if isinstance(IntStooges, Exception): raise IntStooges test_pickle_dump_load(self.assertIs, IntStooges.CURLY) test_pickle_dump_load(self.assertIs, IntStooges) def test_pickle_float(self): if isinstance(FloatStooges, Exception): raise FloatStooges test_pickle_dump_load(self.assertIs, FloatStooges.CURLY) test_pickle_dump_load(self.assertIs, FloatStooges) def test_pickle_enum_function(self): if isinstance(Answer, Exception): raise Answer test_pickle_dump_load(self.assertIs, Answer.him) test_pickle_dump_load(self.assertIs, Answer) def test_pickle_enum_function_with_module(self): if isinstance(Question, Exception): raise Question test_pickle_dump_load(self.assertIs, Question.who) test_pickle_dump_load(self.assertIs, Question) def test_enum_function_with_qualname(self): if isinstance(Theory, Exception): raise Theory self.assertEqual(Theory.__qualname__, 'spanish_inquisition') def test_class_nested_enum_and_pickle_protocol_four(self): # would normally just have this directly in the class namespace class NestedEnum(Enum): twigs = 'common' shiny = 'rare' self.__class__.NestedEnum = NestedEnum self.NestedEnum.__qualname__ = '%s.NestedEnum' % self.__class__.__name__ test_pickle_dump_load(self.assertIs, self.NestedEnum.twigs) def test_pickle_by_name(self): class ReplaceGlobalInt(IntEnum): ONE = 1 TWO = 2 ReplaceGlobalInt.__reduce_ex__ = enum._reduce_ex_by_name for proto in range(HIGHEST_PROTOCOL): self.assertEqual(ReplaceGlobalInt.TWO.__reduce_ex__(proto), 'TWO') def test_exploding_pickle(self): BadPickle = Enum( 'BadPickle', 'dill sweet bread-n-butter', module=__name__) globals()['BadPickle'] = BadPickle # now break BadPickle to test exception raising enum._make_class_unpicklable(BadPickle) test_pickle_exception(self.assertRaises, TypeError, BadPickle.dill) test_pickle_exception(self.assertRaises, PicklingError, BadPickle) def test_string_enum(self): class SkillLevel(str, Enum): master = 'what is the sound of one hand clapping?' journeyman = 'why did the chicken cross the road?' apprentice = 'knock, knock!' self.assertEqual(SkillLevel.apprentice, 'knock, knock!') def test_getattr_getitem(self): class Period(Enum): morning = 1 noon = 2 evening = 3 night = 4 self.assertIs(Period(2), Period.noon) self.assertIs(getattr(Period, 'night'), Period.night) self.assertIs(Period['morning'], Period.morning) def test_getattr_dunder(self): Season = self.Season self.assertTrue(getattr(Season, '__eq__')) def test_iteration_order(self): class Season(Enum): SUMMER = 2 WINTER = 4 AUTUMN = 3 SPRING = 1 self.assertEqual( list(Season), [Season.SUMMER, Season.WINTER, Season.AUTUMN, Season.SPRING], ) def test_reversed_iteration_order(self): self.assertEqual( list(reversed(self.Season)), [self.Season.WINTER, self.Season.AUTUMN, self.Season.SUMMER, self.Season.SPRING] ) def test_programmatic_function_string(self): SummerMonth = Enum('SummerMonth', 'june july august') lst = list(SummerMonth) self.assertEqual(len(lst), len(SummerMonth)) self.assertEqual(len(SummerMonth), 3, SummerMonth) self.assertEqual( [SummerMonth.june, SummerMonth.july, SummerMonth.august], lst, ) for i, month in enumerate('june july august'.split(), 1): e = SummerMonth(i) self.assertEqual(int(e.value), i) self.assertNotEqual(e, i) self.assertEqual(e.name, month) self.assertIn(e, SummerMonth) self.assertIs(type(e), SummerMonth) def test_programmatic_function_string_with_start(self): SummerMonth = Enum('SummerMonth', 'june july august', start=10) lst = list(SummerMonth) self.assertEqual(len(lst), len(SummerMonth)) self.assertEqual(len(SummerMonth), 3, SummerMonth) self.assertEqual( [SummerMonth.june, SummerMonth.july, SummerMonth.august], lst, ) for i, month in enumerate('june july august'.split(), 10): e = SummerMonth(i) self.assertEqual(int(e.value), i) self.assertNotEqual(e, i) self.assertEqual(e.name, month) self.assertIn(e, SummerMonth) self.assertIs(type(e), SummerMonth) def test_programmatic_function_string_list(self): SummerMonth = Enum('SummerMonth', ['june', 'july', 'august']) lst = list(SummerMonth) self.assertEqual(len(lst), len(SummerMonth)) self.assertEqual(len(SummerMonth), 3, SummerMonth) self.assertEqual( [SummerMonth.june, SummerMonth.july, SummerMonth.august], lst, ) for i, month in enumerate('june july august'.split(), 1): e = SummerMonth(i) self.assertEqual(int(e.value), i) self.assertNotEqual(e, i) self.assertEqual(e.name, month) self.assertIn(e, SummerMonth) self.assertIs(type(e), SummerMonth) def test_programmatic_function_string_list_with_start(self): SummerMonth = Enum('SummerMonth', ['june', 'july', 'august'], start=20) lst = list(SummerMonth) self.assertEqual(len(lst), len(SummerMonth)) self.assertEqual(len(SummerMonth), 3, SummerMonth) self.assertEqual( [SummerMonth.june, SummerMonth.july, SummerMonth.august], lst, ) for i, month in enumerate('june july august'.split(), 20): e = SummerMonth(i) self.assertEqual(int(e.value), i) self.assertNotEqual(e, i) self.assertEqual(e.name, month) self.assertIn(e, SummerMonth) self.assertIs(type(e), SummerMonth) def test_programmatic_function_iterable(self): SummerMonth = Enum( 'SummerMonth', (('june', 1), ('july', 2), ('august', 3)) ) lst = list(SummerMonth) self.assertEqual(len(lst), len(SummerMonth)) self.assertEqual(len(SummerMonth), 3, SummerMonth) self.assertEqual( [SummerMonth.june, SummerMonth.july, SummerMonth.august], lst, ) for i, month in enumerate('june july august'.split(), 1): e = SummerMonth(i) self.assertEqual(int(e.value), i) self.assertNotEqual(e, i) self.assertEqual(e.name, month) self.assertIn(e, SummerMonth) self.assertIs(type(e), SummerMonth) def test_programmatic_function_from_dict(self): SummerMonth = Enum( 'SummerMonth', OrderedDict((('june', 1), ('july', 2), ('august', 3))) ) lst = list(SummerMonth) self.assertEqual(len(lst), len(SummerMonth)) self.assertEqual(len(SummerMonth), 3, SummerMonth) self.assertEqual( [SummerMonth.june, SummerMonth.july, SummerMonth.august], lst, ) for i, month in enumerate('june july august'.split(), 1): e = SummerMonth(i) self.assertEqual(int(e.value), i) self.assertNotEqual(e, i) self.assertEqual(e.name, month) self.assertIn(e, SummerMonth) self.assertIs(type(e), SummerMonth) def test_programmatic_function_type(self): SummerMonth = Enum('SummerMonth', 'june july august', type=int) lst = list(SummerMonth) self.assertEqual(len(lst), len(SummerMonth)) self.assertEqual(len(SummerMonth), 3, SummerMonth) self.assertEqual( [SummerMonth.june, SummerMonth.july, SummerMonth.august], lst, ) for i, month in enumerate('june july august'.split(), 1): e = SummerMonth(i) self.assertEqual(e, i) self.assertEqual(e.name, month) self.assertIn(e, SummerMonth) self.assertIs(type(e), SummerMonth) def test_programmatic_function_type_with_start(self): SummerMonth = Enum('SummerMonth', 'june july august', type=int, start=30) lst = list(SummerMonth) self.assertEqual(len(lst), len(SummerMonth)) self.assertEqual(len(SummerMonth), 3, SummerMonth) self.assertEqual( [SummerMonth.june, SummerMonth.july, SummerMonth.august], lst, ) for i, month in enumerate('june july august'.split(), 30): e = SummerMonth(i) self.assertEqual(e, i) self.assertEqual(e.name, month) self.assertIn(e, SummerMonth) self.assertIs(type(e), SummerMonth) def test_programmatic_function_type_from_subclass(self): SummerMonth = IntEnum('SummerMonth', 'june july august') lst = list(SummerMonth) self.assertEqual(len(lst), len(SummerMonth)) self.assertEqual(len(SummerMonth), 3, SummerMonth) self.assertEqual( [SummerMonth.june, SummerMonth.july, SummerMonth.august], lst, ) for i, month in enumerate('june july august'.split(), 1): e = SummerMonth(i) self.assertEqual(e, i) self.assertEqual(e.name, month) self.assertIn(e, SummerMonth) self.assertIs(type(e), SummerMonth) def test_programmatic_function_type_from_subclass_with_start(self): SummerMonth = IntEnum('SummerMonth', 'june july august', start=40) lst = list(SummerMonth) self.assertEqual(len(lst), len(SummerMonth)) self.assertEqual(len(SummerMonth), 3, SummerMonth) self.assertEqual( [SummerMonth.june, SummerMonth.july, SummerMonth.august], lst, ) for i, month in enumerate('june july august'.split(), 40): e = SummerMonth(i) self.assertEqual(e, i) self.assertEqual(e.name, month) self.assertIn(e, SummerMonth) self.assertIs(type(e), SummerMonth) def test_subclassing(self): if isinstance(Name, Exception): raise Name self.assertEqual(Name.BDFL, 'Guido van Rossum') self.assertTrue(Name.BDFL, Name('Guido van Rossum')) self.assertIs(Name.BDFL, getattr(Name, 'BDFL')) test_pickle_dump_load(self.assertIs, Name.BDFL) def test_extending(self): class Color(Enum): red = 1 green = 2 blue = 3 with self.assertRaises(TypeError): class MoreColor(Color): cyan = 4 magenta = 5 yellow = 6 with self.assertRaisesRegex(TypeError, "EvenMoreColor: cannot extend enumeration 'Color'"): class EvenMoreColor(Color, IntEnum): chartruese = 7 def test_exclude_methods(self): class whatever(Enum): this = 'that' these = 'those' def really(self): return 'no, not %s' % self.value self.assertIsNot(type(whatever.really), whatever) self.assertEqual(whatever.this.really(), 'no, not that') def test_wrong_inheritance_order(self): with self.assertRaises(TypeError): class Wrong(Enum, str): NotHere = 'error before this point' def test_intenum_transitivity(self): class number(IntEnum): one = 1 two = 2 three = 3 class numero(IntEnum): uno = 1 dos = 2 tres = 3 self.assertEqual(number.one, numero.uno) self.assertEqual(number.two, numero.dos) self.assertEqual(number.three, numero.tres) def test_wrong_enum_in_call(self): class Monochrome(Enum): black = 0 white = 1 class Gender(Enum): male = 0 female = 1 self.assertRaises(ValueError, Monochrome, Gender.male) def test_wrong_enum_in_mixed_call(self): class Monochrome(IntEnum): black = 0 white = 1 class Gender(Enum): male = 0 female = 1 self.assertRaises(ValueError, Monochrome, Gender.male) def test_mixed_enum_in_call_1(self): class Monochrome(IntEnum): black = 0 white = 1 class Gender(IntEnum): male = 0 female = 1 self.assertIs(Monochrome(Gender.female), Monochrome.white) def test_mixed_enum_in_call_2(self): class Monochrome(Enum): black = 0 white = 1 class Gender(IntEnum): male = 0 female = 1 self.assertIs(Monochrome(Gender.male), Monochrome.black) def test_flufl_enum(self): class Fluflnum(Enum): def __int__(self): return int(self.value) class MailManOptions(Fluflnum): option1 = 1 option2 = 2 option3 = 3 self.assertEqual(int(MailManOptions.option1), 1) def test_introspection(self): class Number(IntEnum): one = 100 two = 200 self.assertIs(Number.one._member_type_, int) self.assertIs(Number._member_type_, int) class String(str, Enum): yarn = 'soft' rope = 'rough' wire = 'hard' self.assertIs(String.yarn._member_type_, str) self.assertIs(String._member_type_, str) class Plain(Enum): vanilla = 'white' one = 1 self.assertIs(Plain.vanilla._member_type_, object) self.assertIs(Plain._member_type_, object) def test_no_such_enum_member(self): class Color(Enum): red = 1 green = 2 blue = 3 with self.assertRaises(ValueError): Color(4) with self.assertRaises(KeyError): Color['chartreuse'] def test_new_repr(self): class Color(Enum): red = 1 green = 2 blue = 3 def __repr__(self): return "don't you just love shades of %s?" % self.name self.assertEqual( repr(Color.blue), "don't you just love shades of blue?", ) def test_inherited_repr(self): class MyEnum(Enum): def __repr__(self): return "My name is %s." % self.name class MyIntEnum(int, MyEnum): this = 1 that = 2 theother = 3 self.assertEqual(repr(MyIntEnum.that), "My name is that.") def test_multiple_mixin_mro(self): class auto_enum(type(Enum)): def __new__(metacls, cls, bases, classdict): temp = type(classdict)() temp._cls_name = cls names = set(classdict._member_names) i = 0 for k in classdict._member_names: v = classdict[k] if v is Ellipsis: v = i else: i = v i += 1 temp[k] = v for k, v in classdict.items(): if k not in names: temp[k] = v return super(auto_enum, metacls).__new__( metacls, cls, bases, temp) class AutoNumberedEnum(Enum, metaclass=auto_enum): pass class AutoIntEnum(IntEnum, metaclass=auto_enum): pass class TestAutoNumber(AutoNumberedEnum): a = ... b = 3 c = ... class TestAutoInt(AutoIntEnum): a = ... b = 3 c = ... def test_subclasses_with_getnewargs(self): class NamedInt(int): __qualname__ = 'NamedInt' # needed for pickle protocol 4 def __new__(cls, *args): _args = args name, *args = args if len(args) == 0: raise TypeError("name and value must be specified") self = int.__new__(cls, *args) self._intname = name self._args = _args return self def __getnewargs__(self): return self._args @property def __name__(self): return self._intname def __repr__(self): # repr() is updated to include the name and type info return "{}({!r}, {})".format(type(self).__name__, self.__name__, int.__repr__(self)) def __str__(self): # str() is unchanged, even if it relies on the repr() fallback base = int base_str = base.__str__ if base_str.__objclass__ is object: return base.__repr__(self) return base_str(self) # for simplicity, we only define one operator that # propagates expressions def __add__(self, other): temp = int(self) + int( other) if isinstance(self, NamedInt) and isinstance(other, NamedInt): return NamedInt( '({0} + {1})'.format(self.__name__, other.__name__), temp ) else: return temp class NEI(NamedInt, Enum): __qualname__ = 'NEI' # needed for pickle protocol 4 x = ('the-x', 1) y = ('the-y', 2) self.assertIs(NEI.__new__, Enum.__new__) self.assertEqual(repr(NEI.x + NEI.y), "NamedInt('(the-x + the-y)', 3)") globals()['NamedInt'] = NamedInt globals()['NEI'] = NEI NI5 = NamedInt('test', 5) self.assertEqual(NI5, 5) test_pickle_dump_load(self.assertEqual, NI5, 5) self.assertEqual(NEI.y.value, 2) test_pickle_dump_load(self.assertIs, NEI.y) test_pickle_dump_load(self.assertIs, NEI) def test_subclasses_with_getnewargs_ex(self): class NamedInt(int): __qualname__ = 'NamedInt' # needed for pickle protocol 4 def __new__(cls, *args): _args = args name, *args = args if len(args) == 0: raise TypeError("name and value must be specified") self = int.__new__(cls, *args) self._intname = name self._args = _args return self def __getnewargs_ex__(self): return self._args, {} @property def __name__(self): return self._intname def __repr__(self): # repr() is updated to include the name and type info return "{}({!r}, {})".format(type(self).__name__, self.__name__, int.__repr__(self)) def __str__(self): # str() is unchanged, even if it relies on the repr() fallback base = int base_str = base.__str__ if base_str.__objclass__ is object: return base.__repr__(self) return base_str(self) # for simplicity, we only define one operator that # propagates expressions def __add__(self, other): temp = int(self) + int( other) if isinstance(self, NamedInt) and isinstance(other, NamedInt): return NamedInt( '({0} + {1})'.format(self.__name__, other.__name__), temp ) else: return temp class NEI(NamedInt, Enum): __qualname__ = 'NEI' # needed for pickle protocol 4 x = ('the-x', 1) y = ('the-y', 2) self.assertIs(NEI.__new__, Enum.__new__) self.assertEqual(repr(NEI.x + NEI.y), "NamedInt('(the-x + the-y)', 3)") globals()['NamedInt'] = NamedInt globals()['NEI'] = NEI NI5 = NamedInt('test', 5) self.assertEqual(NI5, 5) test_pickle_dump_load(self.assertEqual, NI5, 5) self.assertEqual(NEI.y.value, 2) test_pickle_dump_load(self.assertIs, NEI.y) test_pickle_dump_load(self.assertIs, NEI) def test_subclasses_with_reduce(self): class NamedInt(int): __qualname__ = 'NamedInt' # needed for pickle protocol 4 def __new__(cls, *args): _args = args name, *args = args if len(args) == 0: raise TypeError("name and value must be specified") self = int.__new__(cls, *args) self._intname = name self._args = _args return self def __reduce__(self): return self.__class__, self._args @property def __name__(self): return self._intname def __repr__(self): # repr() is updated to include the name and type info return "{}({!r}, {})".format(type(self).__name__, self.__name__, int.__repr__(self)) def __str__(self): # str() is unchanged, even if it relies on the repr() fallback base = int base_str = base.__str__ if base_str.__objclass__ is object: return base.__repr__(self) return base_str(self) # for simplicity, we only define one operator that # propagates expressions def __add__(self, other): temp = int(self) + int( other) if isinstance(self, NamedInt) and isinstance(other, NamedInt): return NamedInt( '({0} + {1})'.format(self.__name__, other.__name__), temp ) else: return temp class NEI(NamedInt, Enum): __qualname__ = 'NEI' # needed for pickle protocol 4 x = ('the-x', 1) y = ('the-y', 2) self.assertIs(NEI.__new__, Enum.__new__) self.assertEqual(repr(NEI.x + NEI.y), "NamedInt('(the-x + the-y)', 3)") globals()['NamedInt'] = NamedInt globals()['NEI'] = NEI NI5 = NamedInt('test', 5) self.assertEqual(NI5, 5) test_pickle_dump_load(self.assertEqual, NI5, 5) self.assertEqual(NEI.y.value, 2) test_pickle_dump_load(self.assertIs, NEI.y) test_pickle_dump_load(self.assertIs, NEI) def test_subclasses_with_reduce_ex(self): class NamedInt(int): __qualname__ = 'NamedInt' # needed for pickle protocol 4 def __new__(cls, *args): _args = args name, *args = args if len(args) == 0: raise TypeError("name and value must be specified") self = int.__new__(cls, *args) self._intname = name self._args = _args return self def __reduce_ex__(self, proto): return self.__class__, self._args @property def __name__(self): return self._intname def __repr__(self): # repr() is updated to include the name and type info return "{}({!r}, {})".format(type(self).__name__, self.__name__, int.__repr__(self)) def __str__(self): # str() is unchanged, even if it relies on the repr() fallback base = int base_str = base.__str__ if base_str.__objclass__ is object: return base.__repr__(self) return base_str(self) # for simplicity, we only define one operator that # propagates expressions def __add__(self, other): temp = int(self) + int( other) if isinstance(self, NamedInt) and isinstance(other, NamedInt): return NamedInt( '({0} + {1})'.format(self.__name__, other.__name__), temp ) else: return temp class NEI(NamedInt, Enum): __qualname__ = 'NEI' # needed for pickle protocol 4 x = ('the-x', 1) y = ('the-y', 2) self.assertIs(NEI.__new__, Enum.__new__) self.assertEqual(repr(NEI.x + NEI.y), "NamedInt('(the-x + the-y)', 3)") globals()['NamedInt'] = NamedInt globals()['NEI'] = NEI NI5 = NamedInt('test', 5) self.assertEqual(NI5, 5) test_pickle_dump_load(self.assertEqual, NI5, 5) self.assertEqual(NEI.y.value, 2) test_pickle_dump_load(self.assertIs, NEI.y) test_pickle_dump_load(self.assertIs, NEI) def test_subclasses_without_direct_pickle_support(self): class NamedInt(int): __qualname__ = 'NamedInt' def __new__(cls, *args): _args = args name, *args = args if len(args) == 0: raise TypeError("name and value must be specified") self = int.__new__(cls, *args) self._intname = name self._args = _args return self @property def __name__(self): return self._intname def __repr__(self): # repr() is updated to include the name and type info return "{}({!r}, {})".format(type(self).__name__, self.__name__, int.__repr__(self)) def __str__(self): # str() is unchanged, even if it relies on the repr() fallback base = int base_str = base.__str__ if base_str.__objclass__ is object: return base.__repr__(self) return base_str(self) # for simplicity, we only define one operator that # propagates expressions def __add__(self, other): temp = int(self) + int( other) if isinstance(self, NamedInt) and isinstance(other, NamedInt): return NamedInt( '({0} + {1})'.format(self.__name__, other.__name__), temp ) else: return temp class NEI(NamedInt, Enum): __qualname__ = 'NEI' x = ('the-x', 1) y = ('the-y', 2) self.assertIs(NEI.__new__, Enum.__new__) self.assertEqual(repr(NEI.x + NEI.y), "NamedInt('(the-x + the-y)', 3)") globals()['NamedInt'] = NamedInt globals()['NEI'] = NEI NI5 = NamedInt('test', 5) self.assertEqual(NI5, 5) self.assertEqual(NEI.y.value, 2) test_pickle_exception(self.assertRaises, TypeError, NEI.x) test_pickle_exception(self.assertRaises, PicklingError, NEI) def test_subclasses_without_direct_pickle_support_using_name(self): class NamedInt(int): __qualname__ = 'NamedInt' def __new__(cls, *args): _args = args name, *args = args if len(args) == 0: raise TypeError("name and value must be specified") self = int.__new__(cls, *args) self._intname = name self._args = _args return self @property def __name__(self): return self._intname def __repr__(self): # repr() is updated to include the name and type info return "{}({!r}, {})".format(type(self).__name__, self.__name__, int.__repr__(self)) def __str__(self): # str() is unchanged, even if it relies on the repr() fallback base = int base_str = base.__str__ if base_str.__objclass__ is object: return base.__repr__(self) return base_str(self) # for simplicity, we only define one operator that # propagates expressions def __add__(self, other): temp = int(self) + int( other) if isinstance(self, NamedInt) and isinstance(other, NamedInt): return NamedInt( '({0} + {1})'.format(self.__name__, other.__name__), temp ) else: return temp class NEI(NamedInt, Enum): __qualname__ = 'NEI' x = ('the-x', 1) y = ('the-y', 2) def __reduce_ex__(self, proto): return getattr, (self.__class__, self._name_) self.assertIs(NEI.__new__, Enum.__new__) self.assertEqual(repr(NEI.x + NEI.y), "NamedInt('(the-x + the-y)', 3)") globals()['NamedInt'] = NamedInt globals()['NEI'] = NEI NI5 = NamedInt('test', 5) self.assertEqual(NI5, 5) self.assertEqual(NEI.y.value, 2) test_pickle_dump_load(self.assertIs, NEI.y) test_pickle_dump_load(self.assertIs, NEI) def test_tuple_subclass(self): class SomeTuple(tuple, Enum): __qualname__ = 'SomeTuple' # needed for pickle protocol 4 first = (1, 'for the money') second = (2, 'for the show') third = (3, 'for the music') self.assertIs(type(SomeTuple.first), SomeTuple) self.assertIsInstance(SomeTuple.second, tuple) self.assertEqual(SomeTuple.third, (3, 'for the music')) globals()['SomeTuple'] = SomeTuple test_pickle_dump_load(self.assertIs, SomeTuple.first) def test_duplicate_values_give_unique_enum_items(self): class AutoNumber(Enum): first = () second = () third = () def __new__(cls): value = len(cls.__members__) + 1 obj = object.__new__(cls) obj._value_ = value return obj def __int__(self): return int(self._value_) self.assertEqual( list(AutoNumber), [AutoNumber.first, AutoNumber.second, AutoNumber.third], ) self.assertEqual(int(AutoNumber.second), 2) self.assertEqual(AutoNumber.third.value, 3) self.assertIs(AutoNumber(1), AutoNumber.first) def test_inherited_new_from_enhanced_enum(self): class AutoNumber(Enum): def __new__(cls): value = len(cls.__members__) + 1 obj = object.__new__(cls) obj._value_ = value return obj def __int__(self): return int(self._value_) class Color(AutoNumber): red = () green = () blue = () self.assertEqual(list(Color), [Color.red, Color.green, Color.blue]) self.assertEqual(list(map(int, Color)), [1, 2, 3]) def test_inherited_new_from_mixed_enum(self): class AutoNumber(IntEnum): def __new__(cls): value = len(cls.__members__) + 1 obj = int.__new__(cls, value) obj._value_ = value return obj class Color(AutoNumber): red = () green = () blue = () self.assertEqual(list(Color), [Color.red, Color.green, Color.blue]) self.assertEqual(list(map(int, Color)), [1, 2, 3]) def test_equality(self): class OrdinaryEnum(Enum): a = 1 self.assertEqual(ALWAYS_EQ, OrdinaryEnum.a) self.assertEqual(OrdinaryEnum.a, ALWAYS_EQ) def test_ordered_mixin(self): class OrderedEnum(Enum): def __ge__(self, other): if self.__class__ is other.__class__: return self._value_ >= other._value_ return NotImplemented def __gt__(self, other): if self.__class__ is other.__class__: return self._value_ > other._value_ return NotImplemented def __le__(self, other): if self.__class__ is other.__class__: return self._value_ <= other._value_ return NotImplemented def __lt__(self, other): if self.__class__ is other.__class__: return self._value_ < other._value_ return NotImplemented class Grade(OrderedEnum): A = 5 B = 4 C = 3 D = 2 F = 1 self.assertGreater(Grade.A, Grade.B) self.assertLessEqual(Grade.F, Grade.C) self.assertLess(Grade.D, Grade.A) self.assertGreaterEqual(Grade.B, Grade.B) self.assertEqual(Grade.B, Grade.B) self.assertNotEqual(Grade.C, Grade.D) def test_extending2(self): class Shade(Enum): def shade(self): print(self.name) class Color(Shade): red = 1 green = 2 blue = 3 with self.assertRaises(TypeError): class MoreColor(Color): cyan = 4 magenta = 5 yellow = 6 def test_extending3(self): class Shade(Enum): def shade(self): return self.name class Color(Shade): def hex(self): return '%s hexlified!' % self.value class MoreColor(Color): cyan = 4 magenta = 5 yellow = 6 self.assertEqual(MoreColor.magenta.hex(), '5 hexlified!') def test_subclass_duplicate_name(self): class Base(Enum): def test(self): pass class Test(Base): test = 1 self.assertIs(type(Test.test), Test) def test_subclass_duplicate_name_dynamic(self): from types import DynamicClassAttribute class Base(Enum): @DynamicClassAttribute def test(self): return 'dynamic' class Test(Base): test = 1 self.assertEqual(Test.test.test, 'dynamic') def test_no_duplicates(self): class UniqueEnum(Enum): def __init__(self, *args): cls = self.__class__ if any(self.value == e.value for e in cls): a = self.name e = cls(self.value).name raise ValueError( "aliases not allowed in UniqueEnum: %r --> %r" % (a, e) ) class Color(UniqueEnum): red = 1 green = 2 blue = 3 with self.assertRaises(ValueError): class Color(UniqueEnum): red = 1 green = 2 blue = 3 grene = 2 def test_init(self): class Planet(Enum): MERCURY = (3.303e+23, 2.4397e6) VENUS = (4.869e+24, 6.0518e6) EARTH = (5.976e+24, 6.37814e6) MARS = (6.421e+23, 3.3972e6) JUPITER = (1.9e+27, 7.1492e7) SATURN = (5.688e+26, 6.0268e7) URANUS = (8.686e+25, 2.5559e7) NEPTUNE = (1.024e+26, 2.4746e7) def __init__(self, mass, radius): self.mass = mass # in kilograms self.radius = radius # in meters @property def surface_gravity(self): # universal gravitational constant (m3 kg-1 s-2) G = 6.67300E-11 return G * self.mass / (self.radius * self.radius) self.assertEqual(round(Planet.EARTH.surface_gravity, 2), 9.80) self.assertEqual(Planet.EARTH.value, (5.976e+24, 6.37814e6)) def test_ignore(self): class Period(timedelta, Enum): ''' different lengths of time ''' def __new__(cls, value, period): obj = timedelta.__new__(cls, value) obj._value_ = value obj.period = period return obj _ignore_ = 'Period i' Period = vars() for i in range(13): Period['month_%d' % i] = i*30, 'month' for i in range(53): Period['week_%d' % i] = i*7, 'week' for i in range(32): Period['day_%d' % i] = i, 'day' OneDay = day_1 OneWeek = week_1 OneMonth = month_1 self.assertFalse(hasattr(Period, '_ignore_')) self.assertFalse(hasattr(Period, 'Period')) self.assertFalse(hasattr(Period, 'i')) self.assertTrue(isinstance(Period.day_1, timedelta)) self.assertTrue(Period.month_1 is Period.day_30) self.assertTrue(Period.week_4 is Period.day_28) def test_nonhash_value(self): class AutoNumberInAList(Enum): def __new__(cls): value = [len(cls.__members__) + 1] obj = object.__new__(cls) obj._value_ = value return obj class ColorInAList(AutoNumberInAList): red = () green = () blue = () self.assertEqual(list(ColorInAList), [ColorInAList.red, ColorInAList.green, ColorInAList.blue]) for enum, value in zip(ColorInAList, range(3)): value += 1 self.assertEqual(enum.value, [value]) self.assertIs(ColorInAList([value]), enum) def test_conflicting_types_resolved_in_new(self): class LabelledIntEnum(int, Enum): def __new__(cls, *args): value, label = args obj = int.__new__(cls, value) obj.label = label obj._value_ = value return obj class LabelledList(LabelledIntEnum): unprocessed = (1, "Unprocessed") payment_complete = (2, "Payment Complete") self.assertEqual(list(LabelledList), [LabelledList.unprocessed, LabelledList.payment_complete]) self.assertEqual(LabelledList.unprocessed, 1) self.assertEqual(LabelledList(1), LabelledList.unprocessed) def test_auto_number(self): class Color(Enum): red = auto() blue = auto() green = auto() self.assertEqual(list(Color), [Color.red, Color.blue, Color.green]) self.assertEqual(Color.red.value, 1) self.assertEqual(Color.blue.value, 2) self.assertEqual(Color.green.value, 3) def test_auto_name(self): class Color(Enum): def _generate_next_value_(name, start, count, last): return name red = auto() blue = auto() green = auto() self.assertEqual(list(Color), [Color.red, Color.blue, Color.green]) self.assertEqual(Color.red.value, 'red') self.assertEqual(Color.blue.value, 'blue') self.assertEqual(Color.green.value, 'green') def test_auto_name_inherit(self): class AutoNameEnum(Enum): def _generate_next_value_(name, start, count, last): return name class Color(AutoNameEnum): red = auto() blue = auto() green = auto() self.assertEqual(list(Color), [Color.red, Color.blue, Color.green]) self.assertEqual(Color.red.value, 'red') self.assertEqual(Color.blue.value, 'blue') self.assertEqual(Color.green.value, 'green') def test_auto_garbage(self): class Color(Enum): red = 'red' blue = auto() self.assertEqual(Color.blue.value, 1) def test_auto_garbage_corrected(self): class Color(Enum): red = 'red' blue = 2 green = auto() self.assertEqual(list(Color), [Color.red, Color.blue, Color.green]) self.assertEqual(Color.red.value, 'red') self.assertEqual(Color.blue.value, 2) self.assertEqual(Color.green.value, 3) def test_auto_order(self): with self.assertRaises(TypeError): class Color(Enum): red = auto() green = auto() blue = auto() def _generate_next_value_(name, start, count, last): return name def test_auto_order_wierd(self): weird_auto = auto() weird_auto.value = 'pathological case' class Color(Enum): red = weird_auto def _generate_next_value_(name, start, count, last): return name blue = auto() self.assertEqual(list(Color), [Color.red, Color.blue]) self.assertEqual(Color.red.value, 'pathological case') self.assertEqual(Color.blue.value, 'blue') def test_duplicate_auto(self): class Dupes(Enum): first = primero = auto() second = auto() third = auto() self.assertEqual([Dupes.first, Dupes.second, Dupes.third], list(Dupes)) def test_default_missing(self): class Color(Enum): RED = 1 GREEN = 2 BLUE = 3 try: Color(7) except ValueError as exc: self.assertTrue(exc.__context__ is None) else: raise Exception('Exception not raised.') def test_missing(self): class Color(Enum): red = 1 green = 2 blue = 3 @classmethod def _missing_(cls, item): if item == 'three': return cls.blue elif item == 'bad return': # trigger internal error return 5 elif item == 'error out': raise ZeroDivisionError else: # trigger not found return None self.assertIs(Color('three'), Color.blue) try: Color(7) except ValueError as exc: self.assertTrue(exc.__context__ is None) else: raise Exception('Exception not raised.') try: Color('bad return') except TypeError as exc: self.assertTrue(isinstance(exc.__context__, ValueError)) else: raise Exception('Exception not raised.') try: Color('error out') except ZeroDivisionError as exc: self.assertTrue(isinstance(exc.__context__, ValueError)) else: raise Exception('Exception not raised.') def test_missing_exceptions_reset(self): import weakref # class TestEnum(enum.Enum): VAL1 = 'val1' VAL2 = 'val2' # class Class1: def __init__(self): # Gracefully handle an exception of our own making try: raise ValueError() except ValueError: pass # class Class2: def __init__(self): # Gracefully handle an exception of Enum's making try: TestEnum('invalid_value') except ValueError: pass # No strong refs here so these are free to die. class_1_ref = weakref.ref(Class1()) class_2_ref = weakref.ref(Class2()) # # The exception raised by Enum creates a reference loop and thus # Class2 instances will stick around until the next gargage collection # cycle, unlike Class1. self.assertIs(class_1_ref(), None) self.assertIs(class_2_ref(), None) def test_multiple_mixin(self): class MaxMixin: @classproperty def MAX(cls): max = len(cls) cls.MAX = max return max class StrMixin: def __str__(self): return self._name_.lower() class SomeEnum(Enum): def behavior(self): return 'booyah' class AnotherEnum(Enum): def behavior(self): return 'nuhuh!' def social(self): return "what's up?" class Color(MaxMixin, Enum): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(Color.RED.value, 1) self.assertEqual(Color.GREEN.value, 2) self.assertEqual(Color.BLUE.value, 3) self.assertEqual(Color.MAX, 3) self.assertEqual(str(Color.BLUE), 'Color.BLUE') class Color(MaxMixin, StrMixin, Enum): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(Color.RED.value, 1) self.assertEqual(Color.GREEN.value, 2) self.assertEqual(Color.BLUE.value, 3) self.assertEqual(Color.MAX, 3) self.assertEqual(str(Color.BLUE), 'blue') class Color(StrMixin, MaxMixin, Enum): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(Color.RED.value, 1) self.assertEqual(Color.GREEN.value, 2) self.assertEqual(Color.BLUE.value, 3) self.assertEqual(Color.MAX, 3) self.assertEqual(str(Color.BLUE), 'blue') class CoolColor(StrMixin, SomeEnum, Enum): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(CoolColor.RED.value, 1) self.assertEqual(CoolColor.GREEN.value, 2) self.assertEqual(CoolColor.BLUE.value, 3) self.assertEqual(str(CoolColor.BLUE), 'blue') self.assertEqual(CoolColor.RED.behavior(), 'booyah') class CoolerColor(StrMixin, AnotherEnum, Enum): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(CoolerColor.RED.value, 1) self.assertEqual(CoolerColor.GREEN.value, 2) self.assertEqual(CoolerColor.BLUE.value, 3) self.assertEqual(str(CoolerColor.BLUE), 'blue') self.assertEqual(CoolerColor.RED.behavior(), 'nuhuh!') self.assertEqual(CoolerColor.RED.social(), "what's up?") class CoolestColor(StrMixin, SomeEnum, AnotherEnum): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(CoolestColor.RED.value, 1) self.assertEqual(CoolestColor.GREEN.value, 2) self.assertEqual(CoolestColor.BLUE.value, 3) self.assertEqual(str(CoolestColor.BLUE), 'blue') self.assertEqual(CoolestColor.RED.behavior(), 'booyah') self.assertEqual(CoolestColor.RED.social(), "what's up?") class ConfusedColor(StrMixin, AnotherEnum, SomeEnum): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(ConfusedColor.RED.value, 1) self.assertEqual(ConfusedColor.GREEN.value, 2) self.assertEqual(ConfusedColor.BLUE.value, 3) self.assertEqual(str(ConfusedColor.BLUE), 'blue') self.assertEqual(ConfusedColor.RED.behavior(), 'nuhuh!') self.assertEqual(ConfusedColor.RED.social(), "what's up?") class ReformedColor(StrMixin, IntEnum, SomeEnum, AnotherEnum): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(ReformedColor.RED.value, 1) self.assertEqual(ReformedColor.GREEN.value, 2) self.assertEqual(ReformedColor.BLUE.value, 3) self.assertEqual(str(ReformedColor.BLUE), 'blue') self.assertEqual(ReformedColor.RED.behavior(), 'booyah') self.assertEqual(ConfusedColor.RED.social(), "what's up?") self.assertTrue(issubclass(ReformedColor, int)) def test_multiple_inherited_mixin(self): class StrEnum(str, Enum): def __new__(cls, *args, **kwargs): for a in args: if not isinstance(a, str): raise TypeError("Enumeration '%s' (%s) is not" " a string" % (a, type(a).__name__)) return str.__new__(cls, *args, **kwargs) @unique class Decision1(StrEnum): REVERT = "REVERT" REVERT_ALL = "REVERT_ALL" RETRY = "RETRY" class MyEnum(StrEnum): pass @unique class Decision2(MyEnum): REVERT = "REVERT" REVERT_ALL = "REVERT_ALL" RETRY = "RETRY" def test_multiple_mixin_inherited(self): class MyInt(int): def __new__(cls, value): return super().__new__(cls, value) class HexMixin: def __repr__(self): return hex(self) class MyIntEnum(HexMixin, MyInt, enum.Enum): pass class Foo(MyIntEnum): TEST = 1 self.assertTrue(isinstance(Foo.TEST, MyInt)) self.assertEqual(repr(Foo.TEST), "0x1") class Fee(MyIntEnum): TEST = 1 def __new__(cls, value): value += 1 member = int.__new__(cls, value) member._value_ = value return member self.assertEqual(Fee.TEST, 2) def test_empty_globals(self): # bpo-35717: sys._getframe(2).f_globals['__name__'] fails with KeyError # when using compile and exec because f_globals is empty code = "from enum import Enum; Enum('Animal', 'ANT BEE CAT DOG')" code = compile(code, "", "exec") global_ns = {} local_ls = {} exec(code, global_ns, local_ls) @unittest.skipUnless( python_version == (3, 9), 'private variables are now normal attributes', ) def test_warning_for_private_variables(self): with self.assertWarns(DeprecationWarning): class Private(Enum): __corporal = 'Radar' self.assertEqual(Private._Private__corporal.value, 'Radar') try: with self.assertWarns(DeprecationWarning): class Private(Enum): __major_ = 'Hoolihan' except ValueError: pass class TestOrder(unittest.TestCase): def test_same_members(self): class Color(Enum): _order_ = 'red green blue' red = 1 green = 2 blue = 3 def test_same_members_with_aliases(self): class Color(Enum): _order_ = 'red green blue' red = 1 green = 2 blue = 3 verde = green def test_same_members_wrong_order(self): with self.assertRaisesRegex(TypeError, 'member order does not match _order_'): class Color(Enum): _order_ = 'red green blue' red = 1 blue = 3 green = 2 def test_order_has_extra_members(self): with self.assertRaisesRegex(TypeError, 'member order does not match _order_'): class Color(Enum): _order_ = 'red green blue purple' red = 1 green = 2 blue = 3 def test_order_has_extra_members_with_aliases(self): with self.assertRaisesRegex(TypeError, 'member order does not match _order_'): class Color(Enum): _order_ = 'red green blue purple' red = 1 green = 2 blue = 3 verde = green def test_enum_has_extra_members(self): with self.assertRaisesRegex(TypeError, 'member order does not match _order_'): class Color(Enum): _order_ = 'red green blue' red = 1 green = 2 blue = 3 purple = 4 def test_enum_has_extra_members_with_aliases(self): with self.assertRaisesRegex(TypeError, 'member order does not match _order_'): class Color(Enum): _order_ = 'red green blue' red = 1 green = 2 blue = 3 purple = 4 verde = green class TestFlag(unittest.TestCase): """Tests of the Flags.""" class Perm(Flag): R, W, X = 4, 2, 1 class Open(Flag): RO = 0 WO = 1 RW = 2 AC = 3 CE = 1<<19 class Color(Flag): BLACK = 0 RED = 1 GREEN = 2 BLUE = 4 PURPLE = RED|BLUE def test_str(self): Perm = self.Perm self.assertEqual(str(Perm.R), 'Perm.R') self.assertEqual(str(Perm.W), 'Perm.W') self.assertEqual(str(Perm.X), 'Perm.X') self.assertEqual(str(Perm.R | Perm.W), 'Perm.R|W') self.assertEqual(str(Perm.R | Perm.W | Perm.X), 'Perm.R|W|X') self.assertEqual(str(Perm(0)), 'Perm.0') self.assertEqual(str(~Perm.R), 'Perm.W|X') self.assertEqual(str(~Perm.W), 'Perm.R|X') self.assertEqual(str(~Perm.X), 'Perm.R|W') self.assertEqual(str(~(Perm.R | Perm.W)), 'Perm.X') self.assertEqual(str(~(Perm.R | Perm.W | Perm.X)), 'Perm.0') self.assertEqual(str(Perm(~0)), 'Perm.R|W|X') Open = self.Open self.assertEqual(str(Open.RO), 'Open.RO') self.assertEqual(str(Open.WO), 'Open.WO') self.assertEqual(str(Open.AC), 'Open.AC') self.assertEqual(str(Open.RO | Open.CE), 'Open.CE') self.assertEqual(str(Open.WO | Open.CE), 'Open.CE|WO') self.assertEqual(str(~Open.RO), 'Open.CE|AC|RW|WO') self.assertEqual(str(~Open.WO), 'Open.CE|RW') self.assertEqual(str(~Open.AC), 'Open.CE') self.assertEqual(str(~(Open.RO | Open.CE)), 'Open.AC') self.assertEqual(str(~(Open.WO | Open.CE)), 'Open.RW') def test_repr(self): Perm = self.Perm self.assertEqual(repr(Perm.R), '') self.assertEqual(repr(Perm.W), '') self.assertEqual(repr(Perm.X), '') self.assertEqual(repr(Perm.R | Perm.W), '') self.assertEqual(repr(Perm.R | Perm.W | Perm.X), '') self.assertEqual(repr(Perm(0)), '') self.assertEqual(repr(~Perm.R), '') self.assertEqual(repr(~Perm.W), '') self.assertEqual(repr(~Perm.X), '') self.assertEqual(repr(~(Perm.R | Perm.W)), '') self.assertEqual(repr(~(Perm.R | Perm.W | Perm.X)), '') self.assertEqual(repr(Perm(~0)), '') Open = self.Open self.assertEqual(repr(Open.RO), '') self.assertEqual(repr(Open.WO), '') self.assertEqual(repr(Open.AC), '') self.assertEqual(repr(Open.RO | Open.CE), '') self.assertEqual(repr(Open.WO | Open.CE), '') self.assertEqual(repr(~Open.RO), '') self.assertEqual(repr(~Open.WO), '') self.assertEqual(repr(~Open.AC), '') self.assertEqual(repr(~(Open.RO | Open.CE)), '') self.assertEqual(repr(~(Open.WO | Open.CE)), '') def test_format(self): Perm = self.Perm self.assertEqual(format(Perm.R, ''), 'Perm.R') self.assertEqual(format(Perm.R | Perm.X, ''), 'Perm.R|X') def test_or(self): Perm = self.Perm for i in Perm: for j in Perm: self.assertEqual((i | j), Perm(i.value | j.value)) self.assertEqual((i | j).value, i.value | j.value) self.assertIs(type(i | j), Perm) for i in Perm: self.assertIs(i | i, i) Open = self.Open self.assertIs(Open.RO | Open.CE, Open.CE) def test_and(self): Perm = self.Perm RW = Perm.R | Perm.W RX = Perm.R | Perm.X WX = Perm.W | Perm.X RWX = Perm.R | Perm.W | Perm.X values = list(Perm) + [RW, RX, WX, RWX, Perm(0)] for i in values: for j in values: self.assertEqual((i & j).value, i.value & j.value) self.assertIs(type(i & j), Perm) for i in Perm: self.assertIs(i & i, i) self.assertIs(i & RWX, i) self.assertIs(RWX & i, i) Open = self.Open self.assertIs(Open.RO & Open.CE, Open.RO) def test_xor(self): Perm = self.Perm for i in Perm: for j in Perm: self.assertEqual((i ^ j).value, i.value ^ j.value) self.assertIs(type(i ^ j), Perm) for i in Perm: self.assertIs(i ^ Perm(0), i) self.assertIs(Perm(0) ^ i, i) Open = self.Open self.assertIs(Open.RO ^ Open.CE, Open.CE) self.assertIs(Open.CE ^ Open.CE, Open.RO) def test_invert(self): Perm = self.Perm RW = Perm.R | Perm.W RX = Perm.R | Perm.X WX = Perm.W | Perm.X RWX = Perm.R | Perm.W | Perm.X values = list(Perm) + [RW, RX, WX, RWX, Perm(0)] for i in values: self.assertIs(type(~i), Perm) self.assertEqual(~~i, i) for i in Perm: self.assertIs(~~i, i) Open = self.Open self.assertIs(Open.WO & ~Open.WO, Open.RO) self.assertIs((Open.WO|Open.CE) & ~Open.WO, Open.CE) def test_bool(self): Perm = self.Perm for f in Perm: self.assertTrue(f) Open = self.Open for f in Open: self.assertEqual(bool(f.value), bool(f)) def test_programatic_function_string(self): Perm = Flag('Perm', 'R W X') lst = list(Perm) self.assertEqual(len(lst), len(Perm)) self.assertEqual(len(Perm), 3, Perm) self.assertEqual(lst, [Perm.R, Perm.W, Perm.X]) for i, n in enumerate('R W X'.split()): v = 1<= (3, 12), '__contains__ now returns True/False for all inputs', ) def test_contains_er(self): Open = self.Open Color = self.Color self.assertFalse(Color.BLACK in Open) self.assertFalse(Open.RO in Color) with self.assertRaises(TypeError): with self.assertWarns(DeprecationWarning): 'BLACK' in Color with self.assertRaises(TypeError): with self.assertWarns(DeprecationWarning): 'RO' in Open with self.assertRaises(TypeError): with self.assertWarns(DeprecationWarning): 1 in Color with self.assertRaises(TypeError): with self.assertWarns(DeprecationWarning): 1 in Open @unittest.skipIf( python_version < (3, 12), '__contains__ only works with enum memmbers before 3.12', ) def test_contains_tf(self): Open = self.Open Color = self.Color self.assertFalse(Color.BLACK in Open) self.assertFalse(Open.RO in Color) self.assertFalse('BLACK' in Color) self.assertFalse('RO' in Open) self.assertTrue(1 in Color) self.assertTrue(1 in Open) def test_member_contains(self): Perm = self.Perm R, W, X = Perm RW = R | W RX = R | X WX = W | X RWX = R | W | X self.assertTrue(R in RW) self.assertTrue(R in RX) self.assertTrue(R in RWX) self.assertTrue(W in RW) self.assertTrue(W in WX) self.assertTrue(W in RWX) self.assertTrue(X in RX) self.assertTrue(X in WX) self.assertTrue(X in RWX) self.assertFalse(R in WX) self.assertFalse(W in RX) self.assertFalse(X in RW) def test_auto_number(self): class Color(Flag): red = auto() blue = auto() green = auto() self.assertEqual(list(Color), [Color.red, Color.blue, Color.green]) self.assertEqual(Color.red.value, 1) self.assertEqual(Color.blue.value, 2) self.assertEqual(Color.green.value, 4) def test_auto_number_garbage(self): with self.assertRaisesRegex(TypeError, 'Invalid Flag value: .not an int.'): class Color(Flag): red = 'not an int' blue = auto() def test_cascading_failure(self): class Bizarre(Flag): c = 3 d = 4 f = 6 # Bizarre.c | Bizarre.d name = "TestFlag.test_cascading_failure..Bizarre" self.assertRaisesRegex(ValueError, "5 is not a valid " + name, Bizarre, 5) self.assertRaisesRegex(ValueError, "5 is not a valid " + name, Bizarre, 5) self.assertRaisesRegex(ValueError, "2 is not a valid " + name, Bizarre, 2) self.assertRaisesRegex(ValueError, "2 is not a valid " + name, Bizarre, 2) self.assertRaisesRegex(ValueError, "1 is not a valid " + name, Bizarre, 1) self.assertRaisesRegex(ValueError, "1 is not a valid " + name, Bizarre, 1) def test_duplicate_auto(self): class Dupes(Enum): first = primero = auto() second = auto() third = auto() self.assertEqual([Dupes.first, Dupes.second, Dupes.third], list(Dupes)) def test_bizarre(self): class Bizarre(Flag): b = 3 c = 4 d = 6 self.assertEqual(repr(Bizarre(7)), '') def test_multiple_mixin(self): class AllMixin: @classproperty def ALL(cls): members = list(cls) all_value = None if members: all_value = members[0] for member in members[1:]: all_value |= member cls.ALL = all_value return all_value class StrMixin: def __str__(self): return self._name_.lower() class Color(AllMixin, Flag): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(Color.RED.value, 1) self.assertEqual(Color.GREEN.value, 2) self.assertEqual(Color.BLUE.value, 4) self.assertEqual(Color.ALL.value, 7) self.assertEqual(str(Color.BLUE), 'Color.BLUE') class Color(AllMixin, StrMixin, Flag): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(Color.RED.value, 1) self.assertEqual(Color.GREEN.value, 2) self.assertEqual(Color.BLUE.value, 4) self.assertEqual(Color.ALL.value, 7) self.assertEqual(str(Color.BLUE), 'blue') class Color(StrMixin, AllMixin, Flag): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(Color.RED.value, 1) self.assertEqual(Color.GREEN.value, 2) self.assertEqual(Color.BLUE.value, 4) self.assertEqual(Color.ALL.value, 7) self.assertEqual(str(Color.BLUE), 'blue') @threading_helper.reap_threads def test_unique_composite(self): # override __eq__ to be identity only class TestFlag(Flag): one = auto() two = auto() three = auto() four = auto() five = auto() six = auto() seven = auto() eight = auto() def __eq__(self, other): return self is other def __hash__(self): return hash(self._value_) # have multiple threads competing to complete the composite members seen = set() failed = False def cycle_enum(): nonlocal failed try: for i in range(256): seen.add(TestFlag(i)) except Exception: failed = True threads = [ threading.Thread(target=cycle_enum) for _ in range(8) ] with threading_helper.start_threads(threads): pass # check that only 248 members were created self.assertFalse( failed, 'at least one thread failed while creating composite members') self.assertEqual(256, len(seen), 'too many composite members created') def test_init_subclass(self): class MyEnum(Flag): def __init_subclass__(cls, **kwds): super().__init_subclass__(**kwds) self.assertFalse(cls.__dict__.get('_test', False)) cls._test1 = 'MyEnum' # class TheirEnum(MyEnum): def __init_subclass__(cls, **kwds): super(TheirEnum, cls).__init_subclass__(**kwds) cls._test2 = 'TheirEnum' class WhoseEnum(TheirEnum): def __init_subclass__(cls, **kwds): pass class NoEnum(WhoseEnum): ONE = 1 self.assertEqual(TheirEnum.__dict__['_test1'], 'MyEnum') self.assertEqual(WhoseEnum.__dict__['_test1'], 'MyEnum') self.assertEqual(WhoseEnum.__dict__['_test2'], 'TheirEnum') self.assertFalse(NoEnum.__dict__.get('_test1', False)) self.assertFalse(NoEnum.__dict__.get('_test2', False)) # class OurEnum(MyEnum): def __init_subclass__(cls, **kwds): cls._test2 = 'OurEnum' class WhereEnum(OurEnum): def __init_subclass__(cls, **kwds): pass class NeverEnum(WhereEnum): ONE = 1 self.assertEqual(OurEnum.__dict__['_test1'], 'MyEnum') self.assertFalse(WhereEnum.__dict__.get('_test1', False)) self.assertEqual(WhereEnum.__dict__['_test2'], 'OurEnum') self.assertFalse(NeverEnum.__dict__.get('_test1', False)) self.assertFalse(NeverEnum.__dict__.get('_test2', False)) class TestIntFlag(unittest.TestCase): """Tests of the IntFlags.""" class Perm(IntFlag): X = 1 << 0 W = 1 << 1 R = 1 << 2 class Open(IntFlag): RO = 0 WO = 1 RW = 2 AC = 3 CE = 1<<19 class Color(IntFlag): BLACK = 0 RED = 1 GREEN = 2 BLUE = 4 PURPLE = RED|BLUE def test_type(self): Perm = self.Perm self.assertTrue(Perm._member_type_ is int) Open = self.Open for f in Perm: self.assertTrue(isinstance(f, Perm)) self.assertEqual(f, f.value) self.assertTrue(isinstance(Perm.W | Perm.X, Perm)) self.assertEqual(Perm.W | Perm.X, 3) for f in Open: self.assertTrue(isinstance(f, Open)) self.assertEqual(f, f.value) self.assertTrue(isinstance(Open.WO | Open.RW, Open)) self.assertEqual(Open.WO | Open.RW, 3) def test_str(self): Perm = self.Perm self.assertEqual(str(Perm.R), 'Perm.R') self.assertEqual(str(Perm.W), 'Perm.W') self.assertEqual(str(Perm.X), 'Perm.X') self.assertEqual(str(Perm.R | Perm.W), 'Perm.R|W') self.assertEqual(str(Perm.R | Perm.W | Perm.X), 'Perm.R|W|X') self.assertEqual(str(Perm.R | 8), 'Perm.8|R') self.assertEqual(str(Perm(0)), 'Perm.0') self.assertEqual(str(Perm(8)), 'Perm.8') self.assertEqual(str(~Perm.R), 'Perm.W|X') self.assertEqual(str(~Perm.W), 'Perm.R|X') self.assertEqual(str(~Perm.X), 'Perm.R|W') self.assertEqual(str(~(Perm.R | Perm.W)), 'Perm.X') self.assertEqual(str(~(Perm.R | Perm.W | Perm.X)), 'Perm.-8') self.assertEqual(str(~(Perm.R | 8)), 'Perm.W|X') self.assertEqual(str(Perm(~0)), 'Perm.R|W|X') self.assertEqual(str(Perm(~8)), 'Perm.R|W|X') Open = self.Open self.assertEqual(str(Open.RO), 'Open.RO') self.assertEqual(str(Open.WO), 'Open.WO') self.assertEqual(str(Open.AC), 'Open.AC') self.assertEqual(str(Open.RO | Open.CE), 'Open.CE') self.assertEqual(str(Open.WO | Open.CE), 'Open.CE|WO') self.assertEqual(str(Open(4)), 'Open.4') self.assertEqual(str(~Open.RO), 'Open.CE|AC|RW|WO') self.assertEqual(str(~Open.WO), 'Open.CE|RW') self.assertEqual(str(~Open.AC), 'Open.CE') self.assertEqual(str(~(Open.RO | Open.CE)), 'Open.AC|RW|WO') self.assertEqual(str(~(Open.WO | Open.CE)), 'Open.RW') self.assertEqual(str(Open(~4)), 'Open.CE|AC|RW|WO') def test_repr(self): Perm = self.Perm self.assertEqual(repr(Perm.R), '') self.assertEqual(repr(Perm.W), '') self.assertEqual(repr(Perm.X), '') self.assertEqual(repr(Perm.R | Perm.W), '') self.assertEqual(repr(Perm.R | Perm.W | Perm.X), '') self.assertEqual(repr(Perm.R | 8), '') self.assertEqual(repr(Perm(0)), '') self.assertEqual(repr(Perm(8)), '') self.assertEqual(repr(~Perm.R), '') self.assertEqual(repr(~Perm.W), '') self.assertEqual(repr(~Perm.X), '') self.assertEqual(repr(~(Perm.R | Perm.W)), '') self.assertEqual(repr(~(Perm.R | Perm.W | Perm.X)), '') self.assertEqual(repr(~(Perm.R | 8)), '') self.assertEqual(repr(Perm(~0)), '') self.assertEqual(repr(Perm(~8)), '') Open = self.Open self.assertEqual(repr(Open.RO), '') self.assertEqual(repr(Open.WO), '') self.assertEqual(repr(Open.AC), '') self.assertEqual(repr(Open.RO | Open.CE), '') self.assertEqual(repr(Open.WO | Open.CE), '') self.assertEqual(repr(Open(4)), '') self.assertEqual(repr(~Open.RO), '') self.assertEqual(repr(~Open.WO), '') self.assertEqual(repr(~Open.AC), '') self.assertEqual(repr(~(Open.RO | Open.CE)), '') self.assertEqual(repr(~(Open.WO | Open.CE)), '') self.assertEqual(repr(Open(~4)), '') def test_format(self): Perm = self.Perm self.assertEqual(format(Perm.R, ''), '4') self.assertEqual(format(Perm.R | Perm.X, ''), '5') def test_or(self): Perm = self.Perm for i in Perm: for j in Perm: self.assertEqual(i | j, i.value | j.value) self.assertEqual((i | j).value, i.value | j.value) self.assertIs(type(i | j), Perm) for j in range(8): self.assertEqual(i | j, i.value | j) self.assertEqual((i | j).value, i.value | j) self.assertIs(type(i | j), Perm) self.assertEqual(j | i, j | i.value) self.assertEqual((j | i).value, j | i.value) self.assertIs(type(j | i), Perm) for i in Perm: self.assertIs(i | i, i) self.assertIs(i | 0, i) self.assertIs(0 | i, i) Open = self.Open self.assertIs(Open.RO | Open.CE, Open.CE) def test_and(self): Perm = self.Perm RW = Perm.R | Perm.W RX = Perm.R | Perm.X WX = Perm.W | Perm.X RWX = Perm.R | Perm.W | Perm.X values = list(Perm) + [RW, RX, WX, RWX, Perm(0)] for i in values: for j in values: self.assertEqual(i & j, i.value & j.value, 'i is %r, j is %r' % (i, j)) self.assertEqual((i & j).value, i.value & j.value, 'i is %r, j is %r' % (i, j)) self.assertIs(type(i & j), Perm, 'i is %r, j is %r' % (i, j)) for j in range(8): self.assertEqual(i & j, i.value & j) self.assertEqual((i & j).value, i.value & j) self.assertIs(type(i & j), Perm) self.assertEqual(j & i, j & i.value) self.assertEqual((j & i).value, j & i.value) self.assertIs(type(j & i), Perm) for i in Perm: self.assertIs(i & i, i) self.assertIs(i & 7, i) self.assertIs(7 & i, i) Open = self.Open self.assertIs(Open.RO & Open.CE, Open.RO) def test_xor(self): Perm = self.Perm for i in Perm: for j in Perm: self.assertEqual(i ^ j, i.value ^ j.value) self.assertEqual((i ^ j).value, i.value ^ j.value) self.assertIs(type(i ^ j), Perm) for j in range(8): self.assertEqual(i ^ j, i.value ^ j) self.assertEqual((i ^ j).value, i.value ^ j) self.assertIs(type(i ^ j), Perm) self.assertEqual(j ^ i, j ^ i.value) self.assertEqual((j ^ i).value, j ^ i.value) self.assertIs(type(j ^ i), Perm) for i in Perm: self.assertIs(i ^ 0, i) self.assertIs(0 ^ i, i) Open = self.Open self.assertIs(Open.RO ^ Open.CE, Open.CE) self.assertIs(Open.CE ^ Open.CE, Open.RO) def test_invert(self): Perm = self.Perm RW = Perm.R | Perm.W RX = Perm.R | Perm.X WX = Perm.W | Perm.X RWX = Perm.R | Perm.W | Perm.X values = list(Perm) + [RW, RX, WX, RWX, Perm(0)] for i in values: self.assertEqual(~i, ~i.value) self.assertEqual((~i).value, ~i.value) self.assertIs(type(~i), Perm) self.assertEqual(~~i, i) for i in Perm: self.assertIs(~~i, i) Open = self.Open self.assertIs(Open.WO & ~Open.WO, Open.RO) self.assertIs((Open.WO|Open.CE) & ~Open.WO, Open.CE) def test_programatic_function_string(self): Perm = IntFlag('Perm', 'R W X') lst = list(Perm) self.assertEqual(len(lst), len(Perm)) self.assertEqual(len(Perm), 3, Perm) self.assertEqual(lst, [Perm.R, Perm.W, Perm.X]) for i, n in enumerate('R W X'.split()): v = 1<= (3, 12), '__contains__ now returns True/False for all inputs', ) def test_contains_er(self): Open = self.Open Color = self.Color self.assertTrue(Color.GREEN in Color) self.assertTrue(Open.RW in Open) self.assertFalse(Color.GREEN in Open) self.assertFalse(Open.RW in Color) with self.assertRaises(TypeError): with self.assertWarns(DeprecationWarning): 'GREEN' in Color with self.assertRaises(TypeError): with self.assertWarns(DeprecationWarning): 'RW' in Open with self.assertRaises(TypeError): with self.assertWarns(DeprecationWarning): 2 in Color with self.assertRaises(TypeError): with self.assertWarns(DeprecationWarning): 2 in Open @unittest.skipIf( python_version < (3, 12), '__contains__ only works with enum memmbers before 3.12', ) def test_contains_tf(self): Open = self.Open Color = self.Color self.assertTrue(Color.GREEN in Color) self.assertTrue(Open.RW in Open) self.assertTrue(Color.GREEN in Open) self.assertTrue(Open.RW in Color) self.assertFalse('GREEN' in Color) self.assertFalse('RW' in Open) self.assertTrue(2 in Color) self.assertTrue(2 in Open) def test_member_contains(self): Perm = self.Perm R, W, X = Perm RW = R | W RX = R | X WX = W | X RWX = R | W | X self.assertTrue(R in RW) self.assertTrue(R in RX) self.assertTrue(R in RWX) self.assertTrue(W in RW) self.assertTrue(W in WX) self.assertTrue(W in RWX) self.assertTrue(X in RX) self.assertTrue(X in WX) self.assertTrue(X in RWX) self.assertFalse(R in WX) self.assertFalse(W in RX) self.assertFalse(X in RW) with self.assertRaises(TypeError): self.assertFalse('test' in RW) def test_bool(self): Perm = self.Perm for f in Perm: self.assertTrue(f) Open = self.Open for f in Open: self.assertEqual(bool(f.value), bool(f)) def test_multiple_mixin(self): class AllMixin: @classproperty def ALL(cls): members = list(cls) all_value = None if members: all_value = members[0] for member in members[1:]: all_value |= member cls.ALL = all_value return all_value class StrMixin: def __str__(self): return self._name_.lower() class Color(AllMixin, IntFlag): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(Color.RED.value, 1) self.assertEqual(Color.GREEN.value, 2) self.assertEqual(Color.BLUE.value, 4) self.assertEqual(Color.ALL.value, 7) self.assertEqual(str(Color.BLUE), 'Color.BLUE') class Color(AllMixin, StrMixin, IntFlag): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(Color.RED.value, 1) self.assertEqual(Color.GREEN.value, 2) self.assertEqual(Color.BLUE.value, 4) self.assertEqual(Color.ALL.value, 7) self.assertEqual(str(Color.BLUE), 'blue') class Color(StrMixin, AllMixin, IntFlag): RED = auto() GREEN = auto() BLUE = auto() self.assertEqual(Color.RED.value, 1) self.assertEqual(Color.GREEN.value, 2) self.assertEqual(Color.BLUE.value, 4) self.assertEqual(Color.ALL.value, 7) self.assertEqual(str(Color.BLUE), 'blue') @threading_helper.reap_threads def test_unique_composite(self): # override __eq__ to be identity only class TestFlag(IntFlag): one = auto() two = auto() three = auto() four = auto() five = auto() six = auto() seven = auto() eight = auto() def __eq__(self, other): return self is other def __hash__(self): return hash(self._value_) # have multiple threads competing to complete the composite members seen = set() failed = False def cycle_enum(): nonlocal failed try: for i in range(256): seen.add(TestFlag(i)) except Exception: failed = True threads = [ threading.Thread(target=cycle_enum) for _ in range(8) ] with threading_helper.start_threads(threads): pass # check that only 248 members were created self.assertFalse( failed, 'at least one thread failed while creating composite members') self.assertEqual(256, len(seen), 'too many composite members created') class TestEmptyAndNonLatinStrings(unittest.TestCase): def test_empty_string(self): with self.assertRaises(ValueError): empty_abc = Enum('empty_abc', ('', 'B', 'C')) def test_non_latin_character_string(self): greek_abc = Enum('greek_abc', ('\u03B1', 'B', 'C')) item = getattr(greek_abc, '\u03B1') self.assertEqual(item.value, 1) def test_non_latin_number_string(self): hebrew_123 = Enum('hebrew_123', ('\u05D0', '2', '3')) item = getattr(hebrew_123, '\u05D0') self.assertEqual(item.value, 1) class TestUnique(unittest.TestCase): def test_unique_clean(self): @unique class Clean(Enum): one = 1 two = 'dos' tres = 4.0 @unique class Cleaner(IntEnum): single = 1 double = 2 triple = 3 def test_unique_dirty(self): with self.assertRaisesRegex(ValueError, 'tres.*one'): @unique class Dirty(Enum): one = 1 two = 'dos' tres = 1 with self.assertRaisesRegex( ValueError, 'double.*single.*turkey.*triple', ): @unique class Dirtier(IntEnum): single = 1 double = 1 triple = 3 turkey = 3 def test_unique_with_name(self): @unique class Silly(Enum): one = 1 two = 'dos' name = 3 @unique class Sillier(IntEnum): single = 1 name = 2 triple = 3 value = 4 expected_help_output_with_docs = """\ Help on class Color in module %s: class Color(enum.Enum) | Color(value, names=None, *, module=None, qualname=None, type=None, start=1) |\x20\x20 | An enumeration. |\x20\x20 | Method resolution order: | Color | enum.Enum | builtins.object |\x20\x20 | Data and other attributes defined here: |\x20\x20 | blue = |\x20\x20 | green = |\x20\x20 | red = |\x20\x20 | ---------------------------------------------------------------------- | Data descriptors inherited from enum.Enum: |\x20\x20 | name | The name of the Enum member. |\x20\x20 | value | The value of the Enum member. |\x20\x20 | ---------------------------------------------------------------------- | Readonly properties inherited from enum.EnumMeta: |\x20\x20 | __members__ | Returns a mapping of member name->value. |\x20\x20\x20\x20\x20\x20 | This mapping lists all enum members, including aliases. Note that this | is a read-only view of the internal mapping.""" expected_help_output_without_docs = """\ Help on class Color in module %s: class Color(enum.Enum) | Color(value, names=None, *, module=None, qualname=None, type=None, start=1) |\x20\x20 | Method resolution order: | Color | enum.Enum | builtins.object |\x20\x20 | Data and other attributes defined here: |\x20\x20 | blue = |\x20\x20 | green = |\x20\x20 | red = |\x20\x20 | ---------------------------------------------------------------------- | Data descriptors inherited from enum.Enum: |\x20\x20 | name |\x20\x20 | value |\x20\x20 | ---------------------------------------------------------------------- | Data descriptors inherited from enum.EnumMeta: |\x20\x20 | __members__""" class TestStdLib(unittest.TestCase): maxDiff = None class Color(Enum): red = 1 green = 2 blue = 3 def test_pydoc(self): # indirectly test __objclass__ if StrEnum.__doc__ is None: expected_text = expected_help_output_without_docs % __name__ else: expected_text = expected_help_output_with_docs % __name__ output = StringIO() helper = pydoc.Helper(output=output) helper(self.Color) result = output.getvalue().strip() self.assertEqual(result, expected_text) def test_inspect_getmembers(self): values = dict(( ('__class__', EnumMeta), ('__doc__', 'An enumeration.'), ('__members__', self.Color.__members__), ('__module__', __name__), ('blue', self.Color.blue), ('green', self.Color.green), ('name', Enum.__dict__['name']), ('red', self.Color.red), ('value', Enum.__dict__['value']), )) result = dict(inspect.getmembers(self.Color)) self.assertEqual(values.keys(), result.keys()) failed = False for k in values.keys(): if result[k] != values[k]: print() print('\n%s\n key: %s\n result: %s\nexpected: %s\n%s\n' % ('=' * 75, k, result[k], values[k], '=' * 75), sep='') failed = True if failed: self.fail("result does not equal expected, see print above") def test_inspect_classify_class_attrs(self): # indirectly test __objclass__ from inspect import Attribute values = [ Attribute(name='__class__', kind='data', defining_class=object, object=EnumMeta), Attribute(name='__doc__', kind='data', defining_class=self.Color, object='An enumeration.'), Attribute(name='__members__', kind='property', defining_class=EnumMeta, object=EnumMeta.__members__), Attribute(name='__module__', kind='data', defining_class=self.Color, object=__name__), Attribute(name='blue', kind='data', defining_class=self.Color, object=self.Color.blue), Attribute(name='green', kind='data', defining_class=self.Color, object=self.Color.green), Attribute(name='red', kind='data', defining_class=self.Color, object=self.Color.red), Attribute(name='name', kind='data', defining_class=Enum, object=Enum.__dict__['name']), Attribute(name='value', kind='data', defining_class=Enum, object=Enum.__dict__['value']), ] values.sort(key=lambda item: item.name) result = list(inspect.classify_class_attrs(self.Color)) result.sort(key=lambda item: item.name) failed = False for v, r in zip(values, result): if r != v: print('\n%s\n%s\n%s\n%s\n' % ('=' * 75, r, v, '=' * 75), sep='') failed = True if failed: self.fail("result does not equal expected, see print above") class MiscTestCase(unittest.TestCase): def test__all__(self): check__all__(self, enum) # These are unordered here on purpose to ensure that declaration order # makes no difference. CONVERT_TEST_NAME_D = 5 CONVERT_TEST_NAME_C = 5 CONVERT_TEST_NAME_B = 5 CONVERT_TEST_NAME_A = 5 # This one should sort first. CONVERT_TEST_NAME_E = 5 CONVERT_TEST_NAME_F = 5 class TestIntEnumConvert(unittest.TestCase): def test_convert_value_lookup_priority(self): test_type = enum.IntEnum._convert_( 'UnittestConvert', ('test.test_enum', '__main__')[__name__=='__main__'], filter=lambda x: x.startswith('CONVERT_TEST_')) # We don't want the reverse lookup value to vary when there are # multiple possible names for a given value. It should always # report the first lexigraphical name in that case. self.assertEqual(test_type(5).name, 'CONVERT_TEST_NAME_A') def test_convert(self): test_type = enum.IntEnum._convert_( 'UnittestConvert', ('test.test_enum', '__main__')[__name__=='__main__'], filter=lambda x: x.startswith('CONVERT_TEST_')) # Ensure that test_type has all of the desired names and values. self.assertEqual(test_type.CONVERT_TEST_NAME_F, test_type.CONVERT_TEST_NAME_A) self.assertEqual(test_type.CONVERT_TEST_NAME_B, 5) self.assertEqual(test_type.CONVERT_TEST_NAME_C, 5) self.assertEqual(test_type.CONVERT_TEST_NAME_D, 5) self.assertEqual(test_type.CONVERT_TEST_NAME_E, 5) # Ensure that test_type only picked up names matching the filter. self.assertEqual([name for name in dir(test_type) if name[0:2] not in ('CO', '__')], [], msg='Names other than CONVERT_TEST_* found.') @unittest.skipUnless(python_version == (3, 8), '_convert was deprecated in 3.8') def test_convert_warn(self): with self.assertWarns(DeprecationWarning): enum.IntEnum._convert( 'UnittestConvert', ('test.test_enum', '__main__')[__name__=='__main__'], filter=lambda x: x.startswith('CONVERT_TEST_')) @unittest.skipUnless(python_version >= (3, 9), '_convert was removed in 3.9') def test_convert_raise(self): with self.assertRaises(AttributeError): enum.IntEnum._convert( 'UnittestConvert', ('test.test_enum', '__main__')[__name__=='__main__'], filter=lambda x: x.startswith('CONVERT_TEST_')) class TestHelpers(unittest.TestCase): sunder_names = '_bad_', '_good_', '_what_ho_' dunder_names = '__mal__', '__bien__', '__que_que__' private_names = '_MyEnum__private', '_MyEnum__still_private' private_and_sunder_names = '_MyEnum__private_', '_MyEnum__also_private_' random_names = 'okay', '_semi_private', '_weird__', '_MyEnum__' def test_sunder(self): for name in self.sunder_names + self.private_and_sunder_names: self.assertTrue(enum._is_sunder(name), '%r is a not sunder name?' % name) for name in self.dunder_names + self.private_names + self.random_names: self.assertFalse(enum._is_sunder(name), '%r is a sunder name?' % name) def test_dunder(self): for name in self.dunder_names: self.assertTrue(enum._is_dunder(name), '%r is a not dunder name?' % name) for name in self.sunder_names + self.private_names + self.private_and_sunder_names + self.random_names: self.assertFalse(enum._is_dunder(name), '%r is a dunder name?' % name) def test_is_private(self): for name in self.private_names + self.private_and_sunder_names: self.assertTrue(enum._is_private('MyEnum', name), '%r is a not private name?') for name in self.sunder_names + self.dunder_names + self.random_names: self.assertFalse(enum._is_private('MyEnum', name), '%r is a private name?') if __name__ == '__main__': unittest.main()