Update typing.py and test_typing.py from upstream (https://github.com/python/typing)
This commit is contained in:
Guido van Rossum
parent
63461bc384
commit
4cefe74aef
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@ -9,7 +9,7 @@ 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, List
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from typing import Tuple, List, MutableMapping
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from typing import Callable
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from typing import Generic, ClassVar
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from typing import cast
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@ -21,6 +21,10 @@ 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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try:
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import collections.abc as collections_abc
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except ImportError:
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import collections as collections_abc # Fallback for PY3.2.
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class BaseTestCase(TestCase):
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@ -62,18 +66,11 @@ class AnyTests(BaseTestCase):
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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_any_subclass_type_error(self):
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with self.assertRaises(TypeError):
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issubclass(Employee, Any)
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with self.assertRaises(TypeError):
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issubclass(Any, Employee)
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def test_repr(self):
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self.assertEqual(repr(Any), 'typing.Any')
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@ -88,32 +85,21 @@ class AnyTests(BaseTestCase):
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with self.assertRaises(TypeError):
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class A(Any):
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pass
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with self.assertRaises(TypeError):
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class A(type(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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with self.assertRaises(TypeError):
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type(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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def test_any_works_with_alias(self):
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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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@ -124,13 +110,8 @@ 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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@ -139,16 +120,12 @@ class TypeVarTests(BaseTestCase):
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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_typevar_subclass_type_error(self):
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T = TypeVar('T')
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with self.assertRaises(TypeError):
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issubclass(int, T)
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with self.assertRaises(TypeError):
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issubclass(T, int)
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def test_constrained_error(self):
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with self.assertRaises(TypeError):
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@ -185,19 +162,6 @@ class TypeVarTests(BaseTestCase):
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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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@ -212,12 +176,6 @@ class TypeVarTests(BaseTestCase):
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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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@ -230,8 +188,16 @@ 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_subclass_error(self):
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with self.assertRaises(TypeError):
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issubclass(int, Union)
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with self.assertRaises(TypeError):
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issubclass(Union, int)
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with self.assertRaises(TypeError):
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issubclass(int, Union[int, str])
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with self.assertRaises(TypeError):
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issubclass(Union[int, str], int)
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def test_union_any(self):
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u = Union[Any]
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@ -260,18 +226,6 @@ class UnionTests(BaseTestCase):
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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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@ -284,13 +238,6 @@ class UnionTests(BaseTestCase):
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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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@ -307,6 +254,9 @@ class UnionTests(BaseTestCase):
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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(type(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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@ -314,9 +264,18 @@ class UnionTests(BaseTestCase):
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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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with self.assertRaises(TypeError):
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type(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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with self.assertRaises(TypeError):
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type(u)()
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def test_union_generalization(self):
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self.assertFalse(Union[str, typing.Iterable[int]] == str)
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self.assertFalse(Union[str, typing.Iterable[int]] == typing.Iterable[int])
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self.assertTrue(Union[str, typing.Iterable] == typing.Iterable)
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def test_optional(self):
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o = Optional[int]
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@ -327,10 +286,6 @@ class UnionTests(BaseTestCase):
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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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@ -355,43 +310,19 @@ class UnionTests(BaseTestCase):
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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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with self.assertRaises(TypeError):
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issubclass(Tuple[int, str], Tuple)
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with self.assertRaises(TypeError):
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issubclass(Tuple, Tuple[int, str])
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with self.assertRaises(TypeError):
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issubclass(tuple, Tuple[int, str])
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class TP(tuple): ...
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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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self.assertTrue(issubclass(TP, Tuple))
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def test_equality(self):
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self.assertEqual(Tuple[int], Tuple[int])
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@ -407,21 +338,7 @@ class TupleTests(BaseTestCase):
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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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self.assertIsInstance((0, 0), Tuple)
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def test_repr(self):
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self.assertEqual(repr(Tuple), 'typing.Tuple')
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@ -439,17 +356,9 @@ class TupleTests(BaseTestCase):
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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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with self.assertRaises(TypeError):
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self.assertTrue(issubclass(type(lambda x: x), Callable[[int], int]))
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self.assertTrue(issubclass(type(lambda x: x), Callable))
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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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@ -466,6 +375,11 @@ class CallableTests(BaseTestCase):
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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(type(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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@ -474,9 +388,13 @@ class CallableTests(BaseTestCase):
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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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with self.assertRaises(TypeError):
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type(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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with self.assertRaises(TypeError):
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type(c)()
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def test_callable_instance_works(self):
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def f():
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@ -616,6 +534,12 @@ class GenericTests(BaseTestCase):
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with self.assertRaises(TypeError):
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Y[str, str]
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def test_generic_errors(self):
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with self.assertRaises(TypeError):
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isinstance([], List[int])
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with self.assertRaises(TypeError):
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issubclass(list, List[int])
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def test_init(self):
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T = TypeVar('T')
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S = TypeVar('S')
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@ -671,6 +595,42 @@ class GenericTests(BaseTestCase):
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c.bar = 'abc'
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self.assertEqual(c.__dict__, {'bar': 'abc'})
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def test_false_subclasses(self):
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class MyMapping(MutableMapping[str, str]): pass
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self.assertNotIsInstance({}, MyMapping)
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self.assertNotIsSubclass(dict, MyMapping)
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def test_multiple_abc_bases(self):
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class MM1(MutableMapping[str, str], collections_abc.MutableMapping):
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def __getitem__(self, k):
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return None
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def __setitem__(self, k, v):
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pass
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def __delitem__(self, k):
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pass
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def __iter__(self):
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return iter(())
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def __len__(self):
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return 0
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class MM2(collections_abc.MutableMapping, MutableMapping[str, str]):
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def __getitem__(self, k):
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return None
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def __setitem__(self, k, v):
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pass
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def __delitem__(self, k):
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pass
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def __iter__(self):
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return iter(())
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def __len__(self):
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return 0
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# these two should just work
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MM1().update()
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MM2().update()
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self.assertIsInstance(MM1(), collections_abc.MutableMapping)
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self.assertIsInstance(MM1(), MutableMapping)
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self.assertIsInstance(MM2(), collections_abc.MutableMapping)
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self.assertIsInstance(MM2(), MutableMapping)
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def test_pickle(self):
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global C # pickle wants to reference the class by name
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T = TypeVar('T')
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@ -853,6 +813,8 @@ class ClassVarTests(BaseTestCase):
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pass
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def test_cannot_init(self):
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with self.assertRaises(TypeError):
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ClassVar()
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with self.assertRaises(TypeError):
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type(ClassVar)()
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with self.assertRaises(TypeError):
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@ -865,52 +827,6 @@ class ClassVarTests(BaseTestCase):
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issubclass(int, ClassVar)
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class VarianceTests(BaseTestCase):
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def test_invariance(self):
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# Because of invariance, List[subclass of X] is not a subclass
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# of List[X], and ditto for MutableSequence.
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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 type variable with covariant=True).
|
||||
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):
|
||||
|
|
@ -1247,7 +1163,6 @@ class CollectionsAbcTests(BaseTestCase):
|
|||
# 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)
|
||||
|
|
@ -1256,7 +1171,6 @@ class CollectionsAbcTests(BaseTestCase):
|
|||
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')
|
||||
|
|
@ -1268,13 +1182,8 @@ class CollectionsAbcTests(BaseTestCase):
|
|||
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')
|
||||
|
|
@ -1283,8 +1192,6 @@ class CollectionsAbcTests(BaseTestCase):
|
|||
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')
|
||||
|
|
@ -1292,8 +1199,6 @@ class CollectionsAbcTests(BaseTestCase):
|
|||
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):
|
||||
|
|
@ -1457,10 +1362,6 @@ class CollectionsAbcTests(BaseTestCase):
|
|||
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):
|
||||
|
|
@ -1511,7 +1412,6 @@ class OtherABCTests(BaseTestCase):
|
|||
|
||||
cm = manager()
|
||||
self.assertIsInstance(cm, typing.ContextManager)
|
||||
self.assertIsInstance(cm, typing.ContextManager[int])
|
||||
self.assertNotIsInstance(42, typing.ContextManager)
|
||||
|
||||
|
||||
|
|
@ -1653,22 +1553,16 @@ class RETests(BaseTestCase):
|
|||
pat = re.compile('[a-z]+', re.I)
|
||||
self.assertIsSubclass(pat.__class__, Pattern)
|
||||
self.assertIsSubclass(type(pat), Pattern)
|
||||
self.assertIsSubclass(type(pat), Pattern[str])
|
||||
self.assertIsInstance(pat, Pattern)
|
||||
|
||||
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])
|
||||
self.assertIsInstance(mat, Match)
|
||||
|
||||
# these should just work
|
||||
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):
|
||||
|
|
@ -1681,9 +1575,6 @@ class RETests(BaseTestCase):
|
|||
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])
|
||||
|
|
@ -1710,7 +1601,7 @@ class RETests(BaseTestCase):
|
|||
pass
|
||||
|
||||
self.assertEqual(str(ex.exception),
|
||||
"A type alias cannot be subclassed")
|
||||
"Cannot subclass typing._TypeAlias")
|
||||
|
||||
|
||||
class AllTests(BaseTestCase):
|
||||
|
|
|
|||
697
Lib/typing.py
697
Lib/typing.py
File diff suppressed because it is too large
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Reference in New Issue