| import enum |
| import unittest |
| from collections import OrderedDict |
| from pickle import dumps, loads, PicklingError |
| from enum import Enum, IntEnum, unique |
| |
| # 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 |
| |
| # 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 |
| |
| # for doctests |
| try: |
| class Fruit(Enum): |
| tomato = 1 |
| banana = 2 |
| cherry = 3 |
| except Exception: |
| pass |
| |
| class TestEnum(unittest.TestCase): |
| def setUp(self): |
| class Season(Enum): |
| SPRING = 1 |
| SUMMER = 2 |
| AUTUMN = 3 |
| WINTER = 4 |
| self.Season = Season |
| |
| 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_dir_on_class(self): |
| Season = self.Season |
| self.assertEqual( |
| set(dir(Season)), |
| set(['__class__', '__doc__', '__members__', |
| 'SPRING', 'SUMMER', 'AUTUMN', 'WINTER']), |
| ) |
| |
| def test_dir_on_item(self): |
| Season = self.Season |
| self.assertEqual( |
| set(dir(Season.WINTER)), |
| set(['__class__', '__doc__', 'name', 'value']), |
| ) |
| |
| 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), |
| '<Season.{0}: {1}>'.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_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_contains(self): |
| Season = self.Season |
| self.assertIn(Season.AUTUMN, Season) |
| self.assertNotIn(3, 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_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_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 = 3.141596 |
| tau = 2 * pi |
| self.assertTrue(phy.pi < phy.tau) |
| |
| def test_floatenum_inherited(self): |
| class FloatEnum(float, Enum): |
| pass |
| class phy(FloatEnum): |
| pi = 3.141596 |
| 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_pickle_enum(self): |
| if isinstance(Stooges, Exception): |
| raise Stooges |
| self.assertIs(Stooges.CURLY, loads(dumps(Stooges.CURLY))) |
| self.assertIs(Stooges, loads(dumps(Stooges))) |
| |
| def test_pickle_int(self): |
| if isinstance(IntStooges, Exception): |
| raise IntStooges |
| self.assertIs(IntStooges.CURLY, loads(dumps(IntStooges.CURLY))) |
| self.assertIs(IntStooges, loads(dumps(IntStooges))) |
| |
| def test_pickle_float(self): |
| if isinstance(FloatStooges, Exception): |
| raise FloatStooges |
| self.assertIs(FloatStooges.CURLY, loads(dumps(FloatStooges.CURLY))) |
| self.assertIs(FloatStooges, loads(dumps(FloatStooges))) |
| |
| def test_pickle_enum_function(self): |
| if isinstance(Answer, Exception): |
| raise Answer |
| self.assertIs(Answer.him, loads(dumps(Answer.him))) |
| self.assertIs(Answer, loads(dumps(Answer))) |
| |
| def test_pickle_enum_function_with_module(self): |
| if isinstance(Question, Exception): |
| raise Question |
| self.assertIs(Question.who, loads(dumps(Question.who))) |
| self.assertIs(Question, loads(dumps(Question))) |
| |
| def test_exploding_pickle(self): |
| BadPickle = Enum('BadPickle', 'dill sweet bread-n-butter') |
| enum._make_class_unpicklable(BadPickle) |
| globals()['BadPickle'] = BadPickle |
| with self.assertRaises(TypeError): |
| dumps(BadPickle.dill) |
| with self.assertRaises(PicklingError): |
| dumps(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_programatic_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_programatic_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_programatic_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_programatic_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_programatic_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_programatic_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_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')) |
| self.assertIs(Name.BDFL, loads(dumps(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 |
| |
| 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_overwrite_enums(self): |
| class Why(Enum): |
| question = 1 |
| answer = 2 |
| propisition = 3 |
| def question(self): |
| print(42) |
| self.assertIsNot(type(Why.question), Why) |
| self.assertNotIn(Why.question, Why._member_names_) |
| self.assertNotIn(Why.question, Why) |
| |
| 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_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)() |
| 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): |
| 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): |
| 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(loads(dumps(NI5)), 5) |
| self.assertEqual(NEI.y.value, 2) |
| self.assertIs(loads(dumps(NEI.y)), NEI.y) |
| |
| def test_subclasses_without_getnewargs(self): |
| class NamedInt(int): |
| 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): |
| 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) |
| with self.assertRaises(TypeError): |
| dumps(NEI.x) |
| with self.assertRaises(PicklingError): |
| dumps(NEI) |
| |
| def test_tuple_subclass(self): |
| class SomeTuple(tuple, Enum): |
| 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 |
| self.assertIs(loads(dumps(SomeTuple.first)), 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_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) |
| |
| 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_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_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]) |
| self.assertEqual(ColorInAList.red.value, [1]) |
| self.assertEqual(ColorInAList([1]), ColorInAList.red) |
| |
| |
| |
| 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 |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |