mirror of
https://github.com/python/cpython.git
synced 2025-11-03 07:01:21 +00:00
91185fe028
(Upstream is https://github.com/python/typing) - Add TYPE_CHECKING (false at runtime, true in type checkers) (upstream #230). - Avoid error on Union[xml.etree.cElementTree.Element, str] (upstream #229). - Repr of Tuple[()] should be 'Tuple[()]' (upstream #231). - Add NewType() (upstream #189).
1590 lines
48 KiB
Python
1590 lines
48 KiB
Python
import contextlib
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import collections
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import pickle
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import re
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import sys
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from unittest import TestCase, main, skipUnless, SkipTest
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from typing import Any
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from typing import TypeVar, AnyStr
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from typing import T, KT, VT # Not in __all__.
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from typing import Union, Optional
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from typing import Tuple
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from typing import Callable
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from typing import Generic
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from typing import cast
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from typing import get_type_hints
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from typing import no_type_check, no_type_check_decorator
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from typing import Type
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from typing import NewType
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from typing import NamedTuple
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from typing import IO, TextIO, BinaryIO
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from typing import Pattern, Match
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import typing
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class BaseTestCase(TestCase):
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def assertIsSubclass(self, cls, class_or_tuple, msg=None):
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if not issubclass(cls, class_or_tuple):
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message = '%r is not a subclass of %r' % (cls, class_or_tuple)
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if msg is not None:
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message += ' : %s' % msg
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raise self.failureException(message)
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def assertNotIsSubclass(self, cls, class_or_tuple, msg=None):
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if issubclass(cls, class_or_tuple):
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message = '%r is a subclass of %r' % (cls, class_or_tuple)
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if msg is not None:
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message += ' : %s' % msg
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raise self.failureException(message)
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class Employee:
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pass
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class Manager(Employee):
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pass
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class Founder(Employee):
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pass
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class ManagingFounder(Manager, Founder):
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pass
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class AnyTests(BaseTestCase):
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def test_any_instance_type_error(self):
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with self.assertRaises(TypeError):
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isinstance(42, Any)
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def test_any_subclass(self):
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self.assertTrue(issubclass(Employee, Any))
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self.assertTrue(issubclass(int, Any))
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self.assertTrue(issubclass(type(None), Any))
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self.assertTrue(issubclass(object, Any))
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def test_others_any(self):
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self.assertFalse(issubclass(Any, Employee))
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self.assertFalse(issubclass(Any, int))
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self.assertFalse(issubclass(Any, type(None)))
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# However, Any is a subclass of object (this can't be helped).
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self.assertTrue(issubclass(Any, object))
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def test_repr(self):
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self.assertEqual(repr(Any), 'typing.Any')
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def test_errors(self):
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with self.assertRaises(TypeError):
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issubclass(42, Any)
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with self.assertRaises(TypeError):
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Any[int] # Any is not a generic type.
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def test_cannot_subclass(self):
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with self.assertRaises(TypeError):
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class A(Any):
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pass
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def test_cannot_instantiate(self):
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with self.assertRaises(TypeError):
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Any()
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def test_cannot_subscript(self):
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with self.assertRaises(TypeError):
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Any[int]
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def test_any_is_subclass(self):
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# Any should be considered a subclass of everything.
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self.assertIsSubclass(Any, Any)
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self.assertIsSubclass(Any, typing.List)
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self.assertIsSubclass(Any, typing.List[int])
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self.assertIsSubclass(Any, typing.List[T])
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self.assertIsSubclass(Any, typing.Mapping)
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self.assertIsSubclass(Any, typing.Mapping[str, int])
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self.assertIsSubclass(Any, typing.Mapping[KT, VT])
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self.assertIsSubclass(Any, Generic)
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self.assertIsSubclass(Any, Generic[T])
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self.assertIsSubclass(Any, Generic[KT, VT])
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self.assertIsSubclass(Any, AnyStr)
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self.assertIsSubclass(Any, Union)
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self.assertIsSubclass(Any, Union[int, str])
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self.assertIsSubclass(Any, typing.Match)
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self.assertIsSubclass(Any, typing.Match[str])
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# These expressions must simply not fail.
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typing.Match[Any]
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typing.Pattern[Any]
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typing.IO[Any]
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class TypeVarTests(BaseTestCase):
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def test_basic_plain(self):
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T = TypeVar('T')
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# Every class is a subclass of T.
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self.assertIsSubclass(int, T)
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self.assertIsSubclass(str, T)
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# T equals itself.
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self.assertEqual(T, T)
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# T is a subclass of itself.
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self.assertIsSubclass(T, T)
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# T is an instance of TypeVar
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self.assertIsInstance(T, TypeVar)
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def test_typevar_instance_type_error(self):
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T = TypeVar('T')
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with self.assertRaises(TypeError):
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isinstance(42, T)
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def test_basic_constrained(self):
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A = TypeVar('A', str, bytes)
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# Only str and bytes are subclasses of A.
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self.assertIsSubclass(str, A)
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self.assertIsSubclass(bytes, A)
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self.assertNotIsSubclass(int, A)
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# A equals itself.
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self.assertEqual(A, A)
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# A is a subclass of itself.
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self.assertIsSubclass(A, A)
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def test_constrained_error(self):
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with self.assertRaises(TypeError):
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X = TypeVar('X', int)
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X
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def test_union_unique(self):
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X = TypeVar('X')
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Y = TypeVar('Y')
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self.assertNotEqual(X, Y)
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self.assertEqual(Union[X], X)
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self.assertNotEqual(Union[X], Union[X, Y])
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self.assertEqual(Union[X, X], X)
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self.assertNotEqual(Union[X, int], Union[X])
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self.assertNotEqual(Union[X, int], Union[int])
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self.assertEqual(Union[X, int].__union_params__, (X, int))
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self.assertEqual(Union[X, int].__union_set_params__, {X, int})
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def test_union_constrained(self):
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A = TypeVar('A', str, bytes)
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self.assertNotEqual(Union[A, str], Union[A])
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def test_repr(self):
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self.assertEqual(repr(T), '~T')
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self.assertEqual(repr(KT), '~KT')
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self.assertEqual(repr(VT), '~VT')
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self.assertEqual(repr(AnyStr), '~AnyStr')
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T_co = TypeVar('T_co', covariant=True)
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self.assertEqual(repr(T_co), '+T_co')
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T_contra = TypeVar('T_contra', contravariant=True)
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self.assertEqual(repr(T_contra), '-T_contra')
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def test_no_redefinition(self):
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self.assertNotEqual(TypeVar('T'), TypeVar('T'))
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self.assertNotEqual(TypeVar('T', int, str), TypeVar('T', int, str))
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def test_subclass_as_unions(self):
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# None of these are true -- each type var is its own world.
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self.assertFalse(issubclass(TypeVar('T', int, str),
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TypeVar('T', int, str)))
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self.assertFalse(issubclass(TypeVar('T', int, float),
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TypeVar('T', int, float, str)))
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self.assertFalse(issubclass(TypeVar('T', int, str),
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TypeVar('T', str, int)))
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A = TypeVar('A', int, str)
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B = TypeVar('B', int, str, float)
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self.assertFalse(issubclass(A, B))
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self.assertFalse(issubclass(B, A))
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def test_cannot_subclass_vars(self):
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with self.assertRaises(TypeError):
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class V(TypeVar('T')):
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pass
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def test_cannot_subclass_var_itself(self):
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with self.assertRaises(TypeError):
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class V(TypeVar):
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pass
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def test_cannot_instantiate_vars(self):
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with self.assertRaises(TypeError):
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TypeVar('A')()
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def test_bound(self):
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X = TypeVar('X', bound=Employee)
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self.assertIsSubclass(Employee, X)
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self.assertIsSubclass(Manager, X)
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self.assertNotIsSubclass(int, X)
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def test_bound_errors(self):
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with self.assertRaises(TypeError):
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TypeVar('X', bound=42)
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with self.assertRaises(TypeError):
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TypeVar('X', str, float, bound=Employee)
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class UnionTests(BaseTestCase):
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def test_basics(self):
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u = Union[int, float]
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self.assertNotEqual(u, Union)
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self.assertTrue(issubclass(int, u))
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self.assertTrue(issubclass(float, u))
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def test_union_any(self):
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u = Union[Any]
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self.assertEqual(u, Any)
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u = Union[int, Any]
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self.assertEqual(u, Any)
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u = Union[Any, int]
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self.assertEqual(u, Any)
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def test_union_object(self):
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u = Union[object]
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self.assertEqual(u, object)
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u = Union[int, object]
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self.assertEqual(u, object)
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u = Union[object, int]
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self.assertEqual(u, object)
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def test_union_any_object(self):
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u = Union[object, Any]
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self.assertEqual(u, Any)
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u = Union[Any, object]
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self.assertEqual(u, Any)
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def test_unordered(self):
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u1 = Union[int, float]
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u2 = Union[float, int]
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self.assertEqual(u1, u2)
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def test_subclass(self):
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u = Union[int, Employee]
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self.assertTrue(issubclass(Manager, u))
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def test_self_subclass(self):
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self.assertTrue(issubclass(Union[KT, VT], Union))
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self.assertFalse(issubclass(Union, Union[KT, VT]))
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def test_multiple_inheritance(self):
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u = Union[int, Employee]
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self.assertTrue(issubclass(ManagingFounder, u))
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def test_single_class_disappears(self):
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t = Union[Employee]
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self.assertIs(t, Employee)
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def test_base_class_disappears(self):
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u = Union[Employee, Manager, int]
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self.assertEqual(u, Union[int, Employee])
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u = Union[Manager, int, Employee]
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self.assertEqual(u, Union[int, Employee])
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u = Union[Employee, Manager]
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self.assertIs(u, Employee)
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def test_weird_subclasses(self):
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u = Union[Employee, int, float]
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v = Union[int, float]
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self.assertTrue(issubclass(v, u))
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w = Union[int, Manager]
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self.assertTrue(issubclass(w, u))
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def test_union_union(self):
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u = Union[int, float]
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v = Union[u, Employee]
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self.assertEqual(v, Union[int, float, Employee])
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def test_repr(self):
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self.assertEqual(repr(Union), 'typing.Union')
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u = Union[Employee, int]
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self.assertEqual(repr(u), 'typing.Union[%s.Employee, int]' % __name__)
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u = Union[int, Employee]
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self.assertEqual(repr(u), 'typing.Union[int, %s.Employee]' % __name__)
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def test_cannot_subclass(self):
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with self.assertRaises(TypeError):
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class C(Union):
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pass
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with self.assertRaises(TypeError):
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class C(Union[int, str]):
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pass
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def test_cannot_instantiate(self):
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with self.assertRaises(TypeError):
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Union()
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u = Union[int, float]
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with self.assertRaises(TypeError):
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u()
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def test_optional(self):
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o = Optional[int]
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u = Union[int, None]
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self.assertEqual(o, u)
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def test_empty(self):
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with self.assertRaises(TypeError):
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Union[()]
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def test_issubclass_union(self):
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self.assertIsSubclass(Union[int, str], Union)
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self.assertNotIsSubclass(int, Union)
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def test_union_instance_type_error(self):
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with self.assertRaises(TypeError):
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isinstance(42, Union[int, str])
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def test_union_str_pattern(self):
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# Shouldn't crash; see http://bugs.python.org/issue25390
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A = Union[str, Pattern]
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A
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def test_etree(self):
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# See https://github.com/python/typing/issues/229
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# (Only relevant for Python 2.)
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try:
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from xml.etree.cElementTree import Element
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except ImportError:
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raise SkipTest("cElementTree not found")
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Union[Element, str] # Shouldn't crash
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def Elem(*args):
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return Element(*args)
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Union[Elem, str] # Nor should this
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class TypeVarUnionTests(BaseTestCase):
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def test_simpler(self):
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A = TypeVar('A', int, str, float)
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B = TypeVar('B', int, str)
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self.assertIsSubclass(A, A)
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self.assertIsSubclass(B, B)
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self.assertNotIsSubclass(B, A)
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self.assertIsSubclass(A, Union[int, str, float])
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self.assertNotIsSubclass(Union[int, str, float], A)
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self.assertNotIsSubclass(Union[int, str], B)
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self.assertIsSubclass(B, Union[int, str])
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self.assertNotIsSubclass(A, B)
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self.assertNotIsSubclass(Union[int, str, float], B)
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self.assertNotIsSubclass(A, Union[int, str])
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def test_var_union_subclass(self):
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self.assertTrue(issubclass(T, Union[int, T]))
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self.assertTrue(issubclass(KT, Union[KT, VT]))
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def test_var_union(self):
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TU = TypeVar('TU', Union[int, float], None)
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self.assertIsSubclass(int, TU)
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self.assertIsSubclass(float, TU)
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class TupleTests(BaseTestCase):
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def test_basics(self):
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self.assertTrue(issubclass(Tuple[int, str], Tuple))
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self.assertTrue(issubclass(Tuple[int, str], Tuple[int, str]))
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self.assertFalse(issubclass(int, Tuple))
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self.assertFalse(issubclass(Tuple[float, str], Tuple[int, str]))
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self.assertFalse(issubclass(Tuple[int, str, int], Tuple[int, str]))
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self.assertFalse(issubclass(Tuple[int, str], Tuple[int, str, int]))
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self.assertTrue(issubclass(tuple, Tuple))
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self.assertFalse(issubclass(Tuple, tuple)) # Can't have it both ways.
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def test_equality(self):
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self.assertEqual(Tuple[int], Tuple[int])
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self.assertEqual(Tuple[int, ...], Tuple[int, ...])
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self.assertNotEqual(Tuple[int], Tuple[int, int])
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self.assertNotEqual(Tuple[int], Tuple[int, ...])
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def test_tuple_subclass(self):
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class MyTuple(tuple):
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pass
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self.assertTrue(issubclass(MyTuple, Tuple))
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def test_tuple_instance_type_error(self):
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with self.assertRaises(TypeError):
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isinstance((0, 0), Tuple[int, int])
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with self.assertRaises(TypeError):
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isinstance((0, 0), Tuple)
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def test_tuple_ellipsis_subclass(self):
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class B:
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pass
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class C(B):
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pass
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self.assertNotIsSubclass(Tuple[B], Tuple[B, ...])
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self.assertIsSubclass(Tuple[C, ...], Tuple[B, ...])
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self.assertNotIsSubclass(Tuple[C, ...], Tuple[B])
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self.assertNotIsSubclass(Tuple[C], Tuple[B, ...])
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def test_repr(self):
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self.assertEqual(repr(Tuple), 'typing.Tuple')
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self.assertEqual(repr(Tuple[()]), 'typing.Tuple[()]')
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self.assertEqual(repr(Tuple[int, float]), 'typing.Tuple[int, float]')
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self.assertEqual(repr(Tuple[int, ...]), 'typing.Tuple[int, ...]')
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def test_errors(self):
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with self.assertRaises(TypeError):
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issubclass(42, Tuple)
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with self.assertRaises(TypeError):
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issubclass(42, Tuple[int])
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class CallableTests(BaseTestCase):
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def test_self_subclass(self):
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self.assertTrue(issubclass(Callable[[int], int], Callable))
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self.assertFalse(issubclass(Callable, Callable[[int], int]))
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self.assertTrue(issubclass(Callable[[int], int], Callable[[int], int]))
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self.assertFalse(issubclass(Callable[[Employee], int],
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Callable[[Manager], int]))
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self.assertFalse(issubclass(Callable[[Manager], int],
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Callable[[Employee], int]))
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self.assertFalse(issubclass(Callable[[int], Employee],
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Callable[[int], Manager]))
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self.assertFalse(issubclass(Callable[[int], Manager],
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Callable[[int], Employee]))
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def test_eq_hash(self):
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self.assertEqual(Callable[[int], int], Callable[[int], int])
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self.assertEqual(len({Callable[[int], int], Callable[[int], int]}), 1)
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self.assertNotEqual(Callable[[int], int], Callable[[int], str])
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self.assertNotEqual(Callable[[int], int], Callable[[str], int])
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self.assertNotEqual(Callable[[int], int], Callable[[int, int], int])
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self.assertNotEqual(Callable[[int], int], Callable[[], int])
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self.assertNotEqual(Callable[[int], int], Callable)
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def test_cannot_subclass(self):
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with self.assertRaises(TypeError):
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class C(Callable):
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pass
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with self.assertRaises(TypeError):
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class C(Callable[[int], int]):
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pass
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def test_cannot_instantiate(self):
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with self.assertRaises(TypeError):
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Callable()
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c = Callable[[int], str]
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with self.assertRaises(TypeError):
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c()
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def test_callable_instance_works(self):
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def f():
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pass
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self.assertIsInstance(f, Callable)
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self.assertNotIsInstance(None, Callable)
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def test_callable_instance_type_error(self):
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def f():
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pass
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with self.assertRaises(TypeError):
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self.assertIsInstance(f, Callable[[], None])
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with self.assertRaises(TypeError):
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self.assertIsInstance(f, Callable[[], Any])
|
|
with self.assertRaises(TypeError):
|
|
self.assertNotIsInstance(None, Callable[[], None])
|
|
with self.assertRaises(TypeError):
|
|
self.assertNotIsInstance(None, Callable[[], Any])
|
|
|
|
def test_repr(self):
|
|
ct0 = Callable[[], bool]
|
|
self.assertEqual(repr(ct0), 'typing.Callable[[], bool]')
|
|
ct2 = Callable[[str, float], int]
|
|
self.assertEqual(repr(ct2), 'typing.Callable[[str, float], int]')
|
|
ctv = Callable[..., str]
|
|
self.assertEqual(repr(ctv), 'typing.Callable[..., str]')
|
|
|
|
def test_callable_with_ellipsis(self):
|
|
|
|
def foo(a: Callable[..., T]):
|
|
pass
|
|
|
|
self.assertEqual(get_type_hints(foo, globals(), locals()),
|
|
{'a': Callable[..., T]})
|
|
|
|
|
|
XK = TypeVar('XK', str, bytes)
|
|
XV = TypeVar('XV')
|
|
|
|
|
|
class SimpleMapping(Generic[XK, XV]):
|
|
|
|
def __getitem__(self, key: XK) -> XV:
|
|
...
|
|
|
|
def __setitem__(self, key: XK, value: XV):
|
|
...
|
|
|
|
def get(self, key: XK, default: XV = None) -> XV:
|
|
...
|
|
|
|
|
|
class MySimpleMapping(SimpleMapping[XK, XV]):
|
|
|
|
def __init__(self):
|
|
self.store = {}
|
|
|
|
def __getitem__(self, key: str):
|
|
return self.store[key]
|
|
|
|
def __setitem__(self, key: str, value):
|
|
self.store[key] = value
|
|
|
|
def get(self, key: str, default=None):
|
|
try:
|
|
return self.store[key]
|
|
except KeyError:
|
|
return default
|
|
|
|
|
|
class ProtocolTests(BaseTestCase):
|
|
|
|
def test_supports_int(self):
|
|
self.assertIsSubclass(int, typing.SupportsInt)
|
|
self.assertNotIsSubclass(str, typing.SupportsInt)
|
|
|
|
def test_supports_float(self):
|
|
self.assertIsSubclass(float, typing.SupportsFloat)
|
|
self.assertNotIsSubclass(str, typing.SupportsFloat)
|
|
|
|
def test_supports_complex(self):
|
|
|
|
# Note: complex itself doesn't have __complex__.
|
|
class C:
|
|
def __complex__(self):
|
|
return 0j
|
|
|
|
self.assertIsSubclass(C, typing.SupportsComplex)
|
|
self.assertNotIsSubclass(str, typing.SupportsComplex)
|
|
|
|
def test_supports_bytes(self):
|
|
|
|
# Note: bytes itself doesn't have __bytes__.
|
|
class B:
|
|
def __bytes__(self):
|
|
return b''
|
|
|
|
self.assertIsSubclass(B, typing.SupportsBytes)
|
|
self.assertNotIsSubclass(str, typing.SupportsBytes)
|
|
|
|
def test_supports_abs(self):
|
|
self.assertIsSubclass(float, typing.SupportsAbs)
|
|
self.assertIsSubclass(int, typing.SupportsAbs)
|
|
self.assertNotIsSubclass(str, typing.SupportsAbs)
|
|
|
|
def test_supports_round(self):
|
|
issubclass(float, typing.SupportsRound)
|
|
self.assertIsSubclass(float, typing.SupportsRound)
|
|
self.assertIsSubclass(int, typing.SupportsRound)
|
|
self.assertNotIsSubclass(str, typing.SupportsRound)
|
|
|
|
def test_reversible(self):
|
|
self.assertIsSubclass(list, typing.Reversible)
|
|
self.assertNotIsSubclass(int, typing.Reversible)
|
|
|
|
def test_protocol_instance_type_error(self):
|
|
with self.assertRaises(TypeError):
|
|
isinstance(0, typing.SupportsAbs)
|
|
|
|
|
|
class GenericTests(BaseTestCase):
|
|
|
|
def test_basics(self):
|
|
X = SimpleMapping[str, Any]
|
|
self.assertEqual(X.__parameters__, ())
|
|
with self.assertRaises(TypeError):
|
|
X[str]
|
|
with self.assertRaises(TypeError):
|
|
X[str, str]
|
|
Y = SimpleMapping[XK, str]
|
|
self.assertEqual(Y.__parameters__, (XK,))
|
|
Y[str]
|
|
with self.assertRaises(TypeError):
|
|
Y[str, str]
|
|
|
|
def test_init(self):
|
|
T = TypeVar('T')
|
|
S = TypeVar('S')
|
|
with self.assertRaises(TypeError):
|
|
Generic[T, T]
|
|
with self.assertRaises(TypeError):
|
|
Generic[T, S, T]
|
|
|
|
def test_repr(self):
|
|
self.assertEqual(repr(SimpleMapping),
|
|
__name__ + '.' + 'SimpleMapping<~XK, ~XV>')
|
|
self.assertEqual(repr(MySimpleMapping),
|
|
__name__ + '.' + 'MySimpleMapping<~XK, ~XV>')
|
|
|
|
def test_chain_repr(self):
|
|
T = TypeVar('T')
|
|
S = TypeVar('S')
|
|
|
|
class C(Generic[T]):
|
|
pass
|
|
|
|
X = C[Tuple[S, T]]
|
|
self.assertEqual(X, C[Tuple[S, T]])
|
|
self.assertNotEqual(X, C[Tuple[T, S]])
|
|
|
|
Y = X[T, int]
|
|
self.assertEqual(Y, X[T, int])
|
|
self.assertNotEqual(Y, X[S, int])
|
|
self.assertNotEqual(Y, X[T, str])
|
|
|
|
Z = Y[str]
|
|
self.assertEqual(Z, Y[str])
|
|
self.assertNotEqual(Z, Y[int])
|
|
self.assertNotEqual(Z, Y[T])
|
|
|
|
self.assertTrue(str(Z).endswith(
|
|
'.C<~T>[typing.Tuple[~S, ~T]]<~S, ~T>[~T, int]<~T>[str]'))
|
|
|
|
def test_dict(self):
|
|
T = TypeVar('T')
|
|
|
|
class B(Generic[T]):
|
|
pass
|
|
|
|
b = B()
|
|
b.foo = 42
|
|
self.assertEqual(b.__dict__, {'foo': 42})
|
|
|
|
class C(B[int]):
|
|
pass
|
|
|
|
c = C()
|
|
c.bar = 'abc'
|
|
self.assertEqual(c.__dict__, {'bar': 'abc'})
|
|
|
|
def test_pickle(self):
|
|
global C # pickle wants to reference the class by name
|
|
T = TypeVar('T')
|
|
|
|
class B(Generic[T]):
|
|
pass
|
|
|
|
class C(B[int]):
|
|
pass
|
|
|
|
c = C()
|
|
c.foo = 42
|
|
c.bar = 'abc'
|
|
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
|
|
z = pickle.dumps(c, proto)
|
|
x = pickle.loads(z)
|
|
self.assertEqual(x.foo, 42)
|
|
self.assertEqual(x.bar, 'abc')
|
|
self.assertEqual(x.__dict__, {'foo': 42, 'bar': 'abc'})
|
|
|
|
def test_errors(self):
|
|
with self.assertRaises(TypeError):
|
|
B = SimpleMapping[XK, Any]
|
|
|
|
class C(Generic[B]):
|
|
pass
|
|
|
|
def test_repr_2(self):
|
|
PY32 = sys.version_info[:2] < (3, 3)
|
|
|
|
class C(Generic[T]):
|
|
pass
|
|
|
|
self.assertEqual(C.__module__, __name__)
|
|
if not PY32:
|
|
self.assertEqual(C.__qualname__,
|
|
'GenericTests.test_repr_2.<locals>.C')
|
|
self.assertEqual(repr(C).split('.')[-1], 'C<~T>')
|
|
X = C[int]
|
|
self.assertEqual(X.__module__, __name__)
|
|
if not PY32:
|
|
self.assertEqual(X.__qualname__, 'C')
|
|
self.assertEqual(repr(X).split('.')[-1], 'C<~T>[int]')
|
|
|
|
class Y(C[int]):
|
|
pass
|
|
|
|
self.assertEqual(Y.__module__, __name__)
|
|
if not PY32:
|
|
self.assertEqual(Y.__qualname__,
|
|
'GenericTests.test_repr_2.<locals>.Y')
|
|
self.assertEqual(repr(Y).split('.')[-1], 'Y')
|
|
|
|
def test_eq_1(self):
|
|
self.assertEqual(Generic, Generic)
|
|
self.assertEqual(Generic[T], Generic[T])
|
|
self.assertNotEqual(Generic[KT], Generic[VT])
|
|
|
|
def test_eq_2(self):
|
|
|
|
class A(Generic[T]):
|
|
pass
|
|
|
|
class B(Generic[T]):
|
|
pass
|
|
|
|
self.assertEqual(A, A)
|
|
self.assertNotEqual(A, B)
|
|
self.assertEqual(A[T], A[T])
|
|
self.assertNotEqual(A[T], B[T])
|
|
|
|
def test_multiple_inheritance(self):
|
|
|
|
class A(Generic[T, VT]):
|
|
pass
|
|
|
|
class B(Generic[KT, T]):
|
|
pass
|
|
|
|
class C(A[T, VT], Generic[VT, T, KT], B[KT, T]):
|
|
pass
|
|
|
|
self.assertEqual(C.__parameters__, (VT, T, KT))
|
|
|
|
def test_nested(self):
|
|
|
|
G = Generic
|
|
|
|
class Visitor(G[T]):
|
|
|
|
a = None
|
|
|
|
def set(self, a: T):
|
|
self.a = a
|
|
|
|
def get(self):
|
|
return self.a
|
|
|
|
def visit(self) -> T:
|
|
return self.a
|
|
|
|
V = Visitor[typing.List[int]]
|
|
|
|
class IntListVisitor(V):
|
|
|
|
def append(self, x: int):
|
|
self.a.append(x)
|
|
|
|
a = IntListVisitor()
|
|
a.set([])
|
|
a.append(1)
|
|
a.append(42)
|
|
self.assertEqual(a.get(), [1, 42])
|
|
|
|
def test_type_erasure(self):
|
|
T = TypeVar('T')
|
|
|
|
class Node(Generic[T]):
|
|
def __init__(self, label: T,
|
|
left: 'Node[T]' = None,
|
|
right: 'Node[T]' = None):
|
|
self.label = label # type: T
|
|
self.left = left # type: Optional[Node[T]]
|
|
self.right = right # type: Optional[Node[T]]
|
|
|
|
def foo(x: T):
|
|
a = Node(x)
|
|
b = Node[T](x)
|
|
c = Node[Any](x)
|
|
self.assertIs(type(a), Node)
|
|
self.assertIs(type(b), Node)
|
|
self.assertIs(type(c), Node)
|
|
self.assertEqual(a.label, x)
|
|
self.assertEqual(b.label, x)
|
|
self.assertEqual(c.label, x)
|
|
|
|
foo(42)
|
|
|
|
def test_implicit_any(self):
|
|
T = TypeVar('T')
|
|
|
|
class C(Generic[T]):
|
|
pass
|
|
|
|
class D(C):
|
|
pass
|
|
|
|
self.assertEqual(D.__parameters__, ())
|
|
|
|
with self.assertRaises(Exception):
|
|
D[int]
|
|
with self.assertRaises(Exception):
|
|
D[Any]
|
|
with self.assertRaises(Exception):
|
|
D[T]
|
|
|
|
|
|
class VarianceTests(BaseTestCase):
|
|
|
|
def test_invariance(self):
|
|
# Because of invariance, List[subclass of X] is not a subclass
|
|
# of List[X], and ditto for MutableSequence.
|
|
self.assertNotIsSubclass(typing.List[Manager], typing.List[Employee])
|
|
self.assertNotIsSubclass(typing.MutableSequence[Manager],
|
|
typing.MutableSequence[Employee])
|
|
# It's still reflexive.
|
|
self.assertIsSubclass(typing.List[Employee], typing.List[Employee])
|
|
self.assertIsSubclass(typing.MutableSequence[Employee],
|
|
typing.MutableSequence[Employee])
|
|
|
|
def test_covariance_tuple(self):
|
|
# Check covariace for Tuple (which are really special cases).
|
|
self.assertIsSubclass(Tuple[Manager], Tuple[Employee])
|
|
self.assertNotIsSubclass(Tuple[Employee], Tuple[Manager])
|
|
# And pairwise.
|
|
self.assertIsSubclass(Tuple[Manager, Manager],
|
|
Tuple[Employee, Employee])
|
|
self.assertNotIsSubclass(Tuple[Employee, Employee],
|
|
Tuple[Manager, Employee])
|
|
# And using ellipsis.
|
|
self.assertIsSubclass(Tuple[Manager, ...], Tuple[Employee, ...])
|
|
self.assertNotIsSubclass(Tuple[Employee, ...], Tuple[Manager, ...])
|
|
|
|
def test_covariance_sequence(self):
|
|
# Check covariance for Sequence (which is just a generic class
|
|
# for this purpose, but using a covariant type variable).
|
|
self.assertIsSubclass(typing.Sequence[Manager],
|
|
typing.Sequence[Employee])
|
|
self.assertNotIsSubclass(typing.Sequence[Employee],
|
|
typing.Sequence[Manager])
|
|
|
|
def test_covariance_mapping(self):
|
|
# Ditto for Mapping (covariant in the value, invariant in the key).
|
|
self.assertIsSubclass(typing.Mapping[Employee, Manager],
|
|
typing.Mapping[Employee, Employee])
|
|
self.assertNotIsSubclass(typing.Mapping[Manager, Employee],
|
|
typing.Mapping[Employee, Employee])
|
|
self.assertNotIsSubclass(typing.Mapping[Employee, Manager],
|
|
typing.Mapping[Manager, Manager])
|
|
self.assertNotIsSubclass(typing.Mapping[Manager, Employee],
|
|
typing.Mapping[Manager, Manager])
|
|
|
|
|
|
class CastTests(BaseTestCase):
|
|
|
|
def test_basics(self):
|
|
self.assertEqual(cast(int, 42), 42)
|
|
self.assertEqual(cast(float, 42), 42)
|
|
self.assertIs(type(cast(float, 42)), int)
|
|
self.assertEqual(cast(Any, 42), 42)
|
|
self.assertEqual(cast(list, 42), 42)
|
|
self.assertEqual(cast(Union[str, float], 42), 42)
|
|
self.assertEqual(cast(AnyStr, 42), 42)
|
|
self.assertEqual(cast(None, 42), 42)
|
|
|
|
def test_errors(self):
|
|
# Bogus calls are not expected to fail.
|
|
cast(42, 42)
|
|
cast('hello', 42)
|
|
|
|
|
|
class ForwardRefTests(BaseTestCase):
|
|
|
|
def test_basics(self):
|
|
|
|
class Node(Generic[T]):
|
|
|
|
def __init__(self, label: T):
|
|
self.label = label
|
|
self.left = self.right = None
|
|
|
|
def add_both(self,
|
|
left: 'Optional[Node[T]]',
|
|
right: 'Node[T]' = None,
|
|
stuff: int = None,
|
|
blah=None):
|
|
self.left = left
|
|
self.right = right
|
|
|
|
def add_left(self, node: Optional['Node[T]']):
|
|
self.add_both(node, None)
|
|
|
|
def add_right(self, node: 'Node[T]' = None):
|
|
self.add_both(None, node)
|
|
|
|
t = Node[int]
|
|
both_hints = get_type_hints(t.add_both, globals(), locals())
|
|
self.assertEqual(both_hints['left'], Optional[Node[T]])
|
|
self.assertEqual(both_hints['right'], Optional[Node[T]])
|
|
self.assertEqual(both_hints['left'], both_hints['right'])
|
|
self.assertEqual(both_hints['stuff'], Optional[int])
|
|
self.assertNotIn('blah', both_hints)
|
|
|
|
left_hints = get_type_hints(t.add_left, globals(), locals())
|
|
self.assertEqual(left_hints['node'], Optional[Node[T]])
|
|
|
|
right_hints = get_type_hints(t.add_right, globals(), locals())
|
|
self.assertEqual(right_hints['node'], Optional[Node[T]])
|
|
|
|
def test_forwardref_instance_type_error(self):
|
|
fr = typing._ForwardRef('int')
|
|
with self.assertRaises(TypeError):
|
|
isinstance(42, fr)
|
|
|
|
def test_union_forward(self):
|
|
|
|
def foo(a: Union['T']):
|
|
pass
|
|
|
|
self.assertEqual(get_type_hints(foo, globals(), locals()),
|
|
{'a': Union[T]})
|
|
|
|
def test_tuple_forward(self):
|
|
|
|
def foo(a: Tuple['T']):
|
|
pass
|
|
|
|
self.assertEqual(get_type_hints(foo, globals(), locals()),
|
|
{'a': Tuple[T]})
|
|
|
|
def test_callable_forward(self):
|
|
|
|
def foo(a: Callable[['T'], 'T']):
|
|
pass
|
|
|
|
self.assertEqual(get_type_hints(foo, globals(), locals()),
|
|
{'a': Callable[[T], T]})
|
|
|
|
def test_callable_with_ellipsis_forward(self):
|
|
|
|
def foo(a: 'Callable[..., T]'):
|
|
pass
|
|
|
|
self.assertEqual(get_type_hints(foo, globals(), locals()),
|
|
{'a': Callable[..., T]})
|
|
|
|
def test_syntax_error(self):
|
|
|
|
with self.assertRaises(SyntaxError):
|
|
Generic['/T']
|
|
|
|
def test_delayed_syntax_error(self):
|
|
|
|
def foo(a: 'Node[T'):
|
|
pass
|
|
|
|
with self.assertRaises(SyntaxError):
|
|
get_type_hints(foo)
|
|
|
|
def test_type_error(self):
|
|
|
|
def foo(a: Tuple['42']):
|
|
pass
|
|
|
|
with self.assertRaises(TypeError):
|
|
get_type_hints(foo)
|
|
|
|
def test_name_error(self):
|
|
|
|
def foo(a: 'Noode[T]'):
|
|
pass
|
|
|
|
with self.assertRaises(NameError):
|
|
get_type_hints(foo, locals())
|
|
|
|
def test_no_type_check(self):
|
|
|
|
@no_type_check
|
|
def foo(a: 'whatevers') -> {}:
|
|
pass
|
|
|
|
th = get_type_hints(foo)
|
|
self.assertEqual(th, {})
|
|
|
|
def test_no_type_check_class(self):
|
|
|
|
@no_type_check
|
|
class C:
|
|
def foo(a: 'whatevers') -> {}:
|
|
pass
|
|
|
|
cth = get_type_hints(C.foo)
|
|
self.assertEqual(cth, {})
|
|
ith = get_type_hints(C().foo)
|
|
self.assertEqual(ith, {})
|
|
|
|
def test_meta_no_type_check(self):
|
|
|
|
@no_type_check_decorator
|
|
def magic_decorator(deco):
|
|
return deco
|
|
|
|
self.assertEqual(magic_decorator.__name__, 'magic_decorator')
|
|
|
|
@magic_decorator
|
|
def foo(a: 'whatevers') -> {}:
|
|
pass
|
|
|
|
@magic_decorator
|
|
class C:
|
|
def foo(a: 'whatevers') -> {}:
|
|
pass
|
|
|
|
self.assertEqual(foo.__name__, 'foo')
|
|
th = get_type_hints(foo)
|
|
self.assertEqual(th, {})
|
|
cth = get_type_hints(C.foo)
|
|
self.assertEqual(cth, {})
|
|
ith = get_type_hints(C().foo)
|
|
self.assertEqual(ith, {})
|
|
|
|
def test_default_globals(self):
|
|
code = ("class C:\n"
|
|
" def foo(self, a: 'C') -> 'D': pass\n"
|
|
"class D:\n"
|
|
" def bar(self, b: 'D') -> C: pass\n"
|
|
)
|
|
ns = {}
|
|
exec(code, ns)
|
|
hints = get_type_hints(ns['C'].foo)
|
|
self.assertEqual(hints, {'a': ns['C'], 'return': ns['D']})
|
|
|
|
|
|
class OverloadTests(BaseTestCase):
|
|
|
|
def test_overload_exists(self):
|
|
from typing import overload
|
|
|
|
def test_overload_fails(self):
|
|
from typing import overload
|
|
|
|
with self.assertRaises(RuntimeError):
|
|
|
|
@overload
|
|
def blah():
|
|
pass
|
|
|
|
blah()
|
|
|
|
def test_overload_succeeds(self):
|
|
from typing import overload
|
|
|
|
@overload
|
|
def blah():
|
|
pass
|
|
|
|
def blah():
|
|
pass
|
|
|
|
blah()
|
|
|
|
|
|
PY35 = sys.version_info[:2] >= (3, 5)
|
|
|
|
PY35_TESTS = """
|
|
import asyncio
|
|
|
|
T_a = TypeVar('T')
|
|
|
|
class AwaitableWrapper(typing.Awaitable[T_a]):
|
|
|
|
def __init__(self, value):
|
|
self.value = value
|
|
|
|
def __await__(self) -> typing.Iterator[T_a]:
|
|
yield
|
|
return self.value
|
|
|
|
class AsyncIteratorWrapper(typing.AsyncIterator[T_a]):
|
|
|
|
def __init__(self, value: typing.Iterable[T_a]):
|
|
self.value = value
|
|
|
|
def __aiter__(self) -> typing.AsyncIterator[T_a]:
|
|
return self
|
|
|
|
@asyncio.coroutine
|
|
def __anext__(self) -> T_a:
|
|
data = yield from self.value
|
|
if data:
|
|
return data
|
|
else:
|
|
raise StopAsyncIteration
|
|
"""
|
|
|
|
if PY35:
|
|
exec(PY35_TESTS)
|
|
|
|
|
|
class CollectionsAbcTests(BaseTestCase):
|
|
|
|
def test_hashable(self):
|
|
self.assertIsInstance(42, typing.Hashable)
|
|
self.assertNotIsInstance([], typing.Hashable)
|
|
|
|
def test_iterable(self):
|
|
self.assertIsInstance([], typing.Iterable)
|
|
# Due to ABC caching, the second time takes a separate code
|
|
# path and could fail. So call this a few times.
|
|
self.assertIsInstance([], typing.Iterable)
|
|
self.assertIsInstance([], typing.Iterable)
|
|
self.assertIsInstance([], typing.Iterable[int])
|
|
self.assertNotIsInstance(42, typing.Iterable)
|
|
# Just in case, also test issubclass() a few times.
|
|
self.assertIsSubclass(list, typing.Iterable)
|
|
self.assertIsSubclass(list, typing.Iterable)
|
|
|
|
def test_iterator(self):
|
|
it = iter([])
|
|
self.assertIsInstance(it, typing.Iterator)
|
|
self.assertIsInstance(it, typing.Iterator[int])
|
|
self.assertNotIsInstance(42, typing.Iterator)
|
|
|
|
@skipUnless(PY35, 'Python 3.5 required')
|
|
def test_awaitable(self):
|
|
ns = {}
|
|
exec(
|
|
"async def foo() -> typing.Awaitable[int]:\n"
|
|
" return await AwaitableWrapper(42)\n",
|
|
globals(), ns)
|
|
foo = ns['foo']
|
|
g = foo()
|
|
self.assertIsSubclass(type(g), typing.Awaitable[int])
|
|
self.assertIsInstance(g, typing.Awaitable)
|
|
self.assertNotIsInstance(foo, typing.Awaitable)
|
|
self.assertIsSubclass(typing.Awaitable[Manager],
|
|
typing.Awaitable[Employee])
|
|
self.assertNotIsSubclass(typing.Awaitable[Employee],
|
|
typing.Awaitable[Manager])
|
|
g.send(None) # Run foo() till completion, to avoid warning.
|
|
|
|
@skipUnless(PY35, 'Python 3.5 required')
|
|
def test_async_iterable(self):
|
|
base_it = range(10) # type: Iterator[int]
|
|
it = AsyncIteratorWrapper(base_it)
|
|
self.assertIsInstance(it, typing.AsyncIterable)
|
|
self.assertIsInstance(it, typing.AsyncIterable)
|
|
self.assertIsSubclass(typing.AsyncIterable[Manager],
|
|
typing.AsyncIterable[Employee])
|
|
self.assertNotIsInstance(42, typing.AsyncIterable)
|
|
|
|
@skipUnless(PY35, 'Python 3.5 required')
|
|
def test_async_iterator(self):
|
|
base_it = range(10) # type: Iterator[int]
|
|
it = AsyncIteratorWrapper(base_it)
|
|
self.assertIsInstance(it, typing.AsyncIterator)
|
|
self.assertIsSubclass(typing.AsyncIterator[Manager],
|
|
typing.AsyncIterator[Employee])
|
|
self.assertNotIsInstance(42, typing.AsyncIterator)
|
|
|
|
def test_sized(self):
|
|
self.assertIsInstance([], typing.Sized)
|
|
self.assertNotIsInstance(42, typing.Sized)
|
|
|
|
def test_container(self):
|
|
self.assertIsInstance([], typing.Container)
|
|
self.assertNotIsInstance(42, typing.Container)
|
|
|
|
def test_abstractset(self):
|
|
self.assertIsInstance(set(), typing.AbstractSet)
|
|
self.assertNotIsInstance(42, typing.AbstractSet)
|
|
|
|
def test_mutableset(self):
|
|
self.assertIsInstance(set(), typing.MutableSet)
|
|
self.assertNotIsInstance(frozenset(), typing.MutableSet)
|
|
|
|
def test_mapping(self):
|
|
self.assertIsInstance({}, typing.Mapping)
|
|
self.assertNotIsInstance(42, typing.Mapping)
|
|
|
|
def test_mutablemapping(self):
|
|
self.assertIsInstance({}, typing.MutableMapping)
|
|
self.assertNotIsInstance(42, typing.MutableMapping)
|
|
|
|
def test_sequence(self):
|
|
self.assertIsInstance([], typing.Sequence)
|
|
self.assertNotIsInstance(42, typing.Sequence)
|
|
|
|
def test_mutablesequence(self):
|
|
self.assertIsInstance([], typing.MutableSequence)
|
|
self.assertNotIsInstance((), typing.MutableSequence)
|
|
|
|
def test_bytestring(self):
|
|
self.assertIsInstance(b'', typing.ByteString)
|
|
self.assertIsInstance(bytearray(b''), typing.ByteString)
|
|
|
|
def test_list(self):
|
|
self.assertIsSubclass(list, typing.List)
|
|
|
|
def test_set(self):
|
|
self.assertIsSubclass(set, typing.Set)
|
|
self.assertNotIsSubclass(frozenset, typing.Set)
|
|
|
|
def test_frozenset(self):
|
|
self.assertIsSubclass(frozenset, typing.FrozenSet)
|
|
self.assertNotIsSubclass(set, typing.FrozenSet)
|
|
|
|
def test_dict(self):
|
|
self.assertIsSubclass(dict, typing.Dict)
|
|
|
|
def test_no_list_instantiation(self):
|
|
with self.assertRaises(TypeError):
|
|
typing.List()
|
|
with self.assertRaises(TypeError):
|
|
typing.List[T]()
|
|
with self.assertRaises(TypeError):
|
|
typing.List[int]()
|
|
|
|
def test_list_subclass(self):
|
|
|
|
class MyList(typing.List[int]):
|
|
pass
|
|
|
|
a = MyList()
|
|
self.assertIsInstance(a, MyList)
|
|
self.assertIsInstance(a, typing.Sequence)
|
|
|
|
self.assertIsSubclass(MyList, list)
|
|
self.assertNotIsSubclass(list, MyList)
|
|
|
|
def test_no_dict_instantiation(self):
|
|
with self.assertRaises(TypeError):
|
|
typing.Dict()
|
|
with self.assertRaises(TypeError):
|
|
typing.Dict[KT, VT]()
|
|
with self.assertRaises(TypeError):
|
|
typing.Dict[str, int]()
|
|
|
|
def test_dict_subclass(self):
|
|
|
|
class MyDict(typing.Dict[str, int]):
|
|
pass
|
|
|
|
d = MyDict()
|
|
self.assertIsInstance(d, MyDict)
|
|
self.assertIsInstance(d, typing.MutableMapping)
|
|
|
|
self.assertIsSubclass(MyDict, dict)
|
|
self.assertNotIsSubclass(dict, MyDict)
|
|
|
|
def test_no_defaultdict_instantiation(self):
|
|
with self.assertRaises(TypeError):
|
|
typing.DefaultDict()
|
|
with self.assertRaises(TypeError):
|
|
typing.DefaultDict[KT, VT]()
|
|
with self.assertRaises(TypeError):
|
|
typing.DefaultDict[str, int]()
|
|
|
|
def test_defaultdict_subclass(self):
|
|
|
|
class MyDefDict(typing.DefaultDict[str, int]):
|
|
pass
|
|
|
|
dd = MyDefDict()
|
|
self.assertIsInstance(dd, MyDefDict)
|
|
|
|
self.assertIsSubclass(MyDefDict, collections.defaultdict)
|
|
self.assertNotIsSubclass(collections.defaultdict, MyDefDict)
|
|
|
|
def test_no_set_instantiation(self):
|
|
with self.assertRaises(TypeError):
|
|
typing.Set()
|
|
with self.assertRaises(TypeError):
|
|
typing.Set[T]()
|
|
with self.assertRaises(TypeError):
|
|
typing.Set[int]()
|
|
|
|
def test_set_subclass_instantiation(self):
|
|
|
|
class MySet(typing.Set[int]):
|
|
pass
|
|
|
|
d = MySet()
|
|
self.assertIsInstance(d, MySet)
|
|
|
|
def test_no_frozenset_instantiation(self):
|
|
with self.assertRaises(TypeError):
|
|
typing.FrozenSet()
|
|
with self.assertRaises(TypeError):
|
|
typing.FrozenSet[T]()
|
|
with self.assertRaises(TypeError):
|
|
typing.FrozenSet[int]()
|
|
|
|
def test_frozenset_subclass_instantiation(self):
|
|
|
|
class MyFrozenSet(typing.FrozenSet[int]):
|
|
pass
|
|
|
|
d = MyFrozenSet()
|
|
self.assertIsInstance(d, MyFrozenSet)
|
|
|
|
def test_no_tuple_instantiation(self):
|
|
with self.assertRaises(TypeError):
|
|
Tuple()
|
|
with self.assertRaises(TypeError):
|
|
Tuple[T]()
|
|
with self.assertRaises(TypeError):
|
|
Tuple[int]()
|
|
|
|
def test_generator(self):
|
|
def foo():
|
|
yield 42
|
|
g = foo()
|
|
self.assertIsSubclass(type(g), typing.Generator)
|
|
self.assertIsSubclass(typing.Generator[Manager, Employee, Manager],
|
|
typing.Generator[Employee, Manager, Employee])
|
|
self.assertNotIsSubclass(typing.Generator[Manager, Manager, Manager],
|
|
typing.Generator[Employee, Employee, Employee])
|
|
|
|
def test_no_generator_instantiation(self):
|
|
with self.assertRaises(TypeError):
|
|
typing.Generator()
|
|
with self.assertRaises(TypeError):
|
|
typing.Generator[T, T, T]()
|
|
with self.assertRaises(TypeError):
|
|
typing.Generator[int, int, int]()
|
|
|
|
def test_subclassing(self):
|
|
|
|
class MMA(typing.MutableMapping):
|
|
pass
|
|
|
|
with self.assertRaises(TypeError): # It's abstract
|
|
MMA()
|
|
|
|
class MMC(MMA):
|
|
def __len__(self):
|
|
return 0
|
|
|
|
self.assertEqual(len(MMC()), 0)
|
|
|
|
class MMB(typing.MutableMapping[KT, VT]):
|
|
def __len__(self):
|
|
return 0
|
|
|
|
self.assertEqual(len(MMB()), 0)
|
|
self.assertEqual(len(MMB[str, str]()), 0)
|
|
self.assertEqual(len(MMB[KT, VT]()), 0)
|
|
|
|
self.assertNotIsSubclass(dict, MMA)
|
|
self.assertNotIsSubclass(dict, MMB)
|
|
|
|
self.assertIsSubclass(MMA, typing.Mapping)
|
|
self.assertIsSubclass(MMB, typing.Mapping)
|
|
self.assertIsSubclass(MMC, typing.Mapping)
|
|
|
|
|
|
class OtherABCTests(BaseTestCase):
|
|
|
|
@skipUnless(hasattr(typing, 'ContextManager'),
|
|
'requires typing.ContextManager')
|
|
def test_contextmanager(self):
|
|
@contextlib.contextmanager
|
|
def manager():
|
|
yield 42
|
|
|
|
cm = manager()
|
|
self.assertIsInstance(cm, typing.ContextManager)
|
|
self.assertIsInstance(cm, typing.ContextManager[int])
|
|
self.assertNotIsInstance(42, typing.ContextManager)
|
|
|
|
|
|
class TypeTests(BaseTestCase):
|
|
|
|
def test_type_basic(self):
|
|
|
|
class User: pass
|
|
class BasicUser(User): pass
|
|
class ProUser(User): pass
|
|
|
|
def new_user(user_class: Type[User]) -> User:
|
|
return user_class()
|
|
|
|
joe = new_user(BasicUser)
|
|
|
|
def test_type_typevar(self):
|
|
|
|
class User: pass
|
|
class BasicUser(User): pass
|
|
class ProUser(User): pass
|
|
|
|
U = TypeVar('U', bound=User)
|
|
|
|
def new_user(user_class: Type[U]) -> U:
|
|
return user_class()
|
|
|
|
joe = new_user(BasicUser)
|
|
|
|
|
|
class NewTypeTests(BaseTestCase):
|
|
|
|
def test_basic(self):
|
|
UserId = NewType('UserId', int)
|
|
UserName = NewType('UserName', str)
|
|
self.assertIsInstance(UserId(5), int)
|
|
self.assertIsInstance(UserName('Joe'), str)
|
|
self.assertEqual(UserId(5) + 1, 6)
|
|
|
|
def test_errors(self):
|
|
UserId = NewType('UserId', int)
|
|
UserName = NewType('UserName', str)
|
|
with self.assertRaises(TypeError):
|
|
issubclass(UserId, int)
|
|
with self.assertRaises(TypeError):
|
|
class D(UserName):
|
|
pass
|
|
|
|
|
|
class NamedTupleTests(BaseTestCase):
|
|
|
|
def test_basics(self):
|
|
Emp = NamedTuple('Emp', [('name', str), ('id', int)])
|
|
self.assertIsSubclass(Emp, tuple)
|
|
joe = Emp('Joe', 42)
|
|
jim = Emp(name='Jim', id=1)
|
|
self.assertIsInstance(joe, Emp)
|
|
self.assertIsInstance(joe, tuple)
|
|
self.assertEqual(joe.name, 'Joe')
|
|
self.assertEqual(joe.id, 42)
|
|
self.assertEqual(jim.name, 'Jim')
|
|
self.assertEqual(jim.id, 1)
|
|
self.assertEqual(Emp.__name__, 'Emp')
|
|
self.assertEqual(Emp._fields, ('name', 'id'))
|
|
self.assertEqual(Emp._field_types, dict(name=str, id=int))
|
|
|
|
def test_pickle(self):
|
|
global Emp # pickle wants to reference the class by name
|
|
Emp = NamedTuple('Emp', [('name', str), ('id', int)])
|
|
jane = Emp('jane', 37)
|
|
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
|
|
z = pickle.dumps(jane, proto)
|
|
jane2 = pickle.loads(z)
|
|
self.assertEqual(jane2, jane)
|
|
|
|
|
|
class IOTests(BaseTestCase):
|
|
|
|
def test_io(self):
|
|
|
|
def stuff(a: IO) -> AnyStr:
|
|
return a.readline()
|
|
|
|
a = stuff.__annotations__['a']
|
|
self.assertEqual(a.__parameters__, (AnyStr,))
|
|
|
|
def test_textio(self):
|
|
|
|
def stuff(a: TextIO) -> str:
|
|
return a.readline()
|
|
|
|
a = stuff.__annotations__['a']
|
|
self.assertEqual(a.__parameters__, ())
|
|
|
|
def test_binaryio(self):
|
|
|
|
def stuff(a: BinaryIO) -> bytes:
|
|
return a.readline()
|
|
|
|
a = stuff.__annotations__['a']
|
|
self.assertEqual(a.__parameters__, ())
|
|
|
|
def test_io_submodule(self):
|
|
from typing.io import IO, TextIO, BinaryIO, __all__, __name__
|
|
self.assertIs(IO, typing.IO)
|
|
self.assertIs(TextIO, typing.TextIO)
|
|
self.assertIs(BinaryIO, typing.BinaryIO)
|
|
self.assertEqual(set(__all__), set(['IO', 'TextIO', 'BinaryIO']))
|
|
self.assertEqual(__name__, 'typing.io')
|
|
|
|
|
|
class RETests(BaseTestCase):
|
|
# Much of this is really testing _TypeAlias.
|
|
|
|
def test_basics(self):
|
|
pat = re.compile('[a-z]+', re.I)
|
|
self.assertIsSubclass(pat.__class__, Pattern)
|
|
self.assertIsSubclass(type(pat), Pattern)
|
|
self.assertIsSubclass(type(pat), Pattern[str])
|
|
|
|
mat = pat.search('12345abcde.....')
|
|
self.assertIsSubclass(mat.__class__, Match)
|
|
self.assertIsSubclass(mat.__class__, Match[str])
|
|
self.assertIsSubclass(mat.__class__, Match[bytes]) # Sad but true.
|
|
self.assertIsSubclass(type(mat), Match)
|
|
self.assertIsSubclass(type(mat), Match[str])
|
|
|
|
p = Pattern[Union[str, bytes]]
|
|
self.assertIsSubclass(Pattern[str], Pattern)
|
|
self.assertIsSubclass(Pattern[str], p)
|
|
|
|
m = Match[Union[bytes, str]]
|
|
self.assertIsSubclass(Match[bytes], Match)
|
|
self.assertIsSubclass(Match[bytes], m)
|
|
|
|
def test_errors(self):
|
|
with self.assertRaises(TypeError):
|
|
# Doesn't fit AnyStr.
|
|
Pattern[int]
|
|
with self.assertRaises(TypeError):
|
|
# Can't change type vars?
|
|
Match[T]
|
|
m = Match[Union[str, bytes]]
|
|
with self.assertRaises(TypeError):
|
|
# Too complicated?
|
|
m[str]
|
|
with self.assertRaises(TypeError):
|
|
# We don't support isinstance().
|
|
isinstance(42, Pattern)
|
|
with self.assertRaises(TypeError):
|
|
# We don't support isinstance().
|
|
isinstance(42, Pattern[str])
|
|
|
|
def test_repr(self):
|
|
self.assertEqual(repr(Pattern), 'Pattern[~AnyStr]')
|
|
self.assertEqual(repr(Pattern[str]), 'Pattern[str]')
|
|
self.assertEqual(repr(Pattern[bytes]), 'Pattern[bytes]')
|
|
self.assertEqual(repr(Match), 'Match[~AnyStr]')
|
|
self.assertEqual(repr(Match[str]), 'Match[str]')
|
|
self.assertEqual(repr(Match[bytes]), 'Match[bytes]')
|
|
|
|
def test_re_submodule(self):
|
|
from typing.re import Match, Pattern, __all__, __name__
|
|
self.assertIs(Match, typing.Match)
|
|
self.assertIs(Pattern, typing.Pattern)
|
|
self.assertEqual(set(__all__), set(['Match', 'Pattern']))
|
|
self.assertEqual(__name__, 'typing.re')
|
|
|
|
def test_cannot_subclass(self):
|
|
with self.assertRaises(TypeError) as ex:
|
|
|
|
class A(typing.Match):
|
|
pass
|
|
|
|
self.assertEqual(str(ex.exception),
|
|
"A type alias cannot be subclassed")
|
|
|
|
|
|
class AllTests(BaseTestCase):
|
|
"""Tests for __all__."""
|
|
|
|
def test_all(self):
|
|
from typing import __all__ as a
|
|
# Just spot-check the first and last of every category.
|
|
self.assertIn('AbstractSet', a)
|
|
self.assertIn('ValuesView', a)
|
|
self.assertIn('cast', a)
|
|
self.assertIn('overload', a)
|
|
if hasattr(contextlib, 'AbstractContextManager'):
|
|
self.assertIn('ContextManager', a)
|
|
# Check that io and re are not exported.
|
|
self.assertNotIn('io', a)
|
|
self.assertNotIn('re', a)
|
|
# Spot-check that stdlib modules aren't exported.
|
|
self.assertNotIn('os', a)
|
|
self.assertNotIn('sys', a)
|
|
# Check that Text is defined.
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self.assertIn('Text', a)
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if __name__ == '__main__':
|
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main()
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