| import asyncio |
| import pickle |
| import re |
| import sys |
| from unittest import TestCase, main |
| |
| from typing import Any |
| from typing import TypeVar, AnyStr |
| from typing import T, KT, VT # Not in __all__. |
| from typing import Union, Optional |
| from typing import Tuple |
| from typing import Callable |
| from typing import Generic |
| from typing import cast |
| from typing import get_type_hints |
| from typing import no_type_check, no_type_check_decorator |
| from typing import NamedTuple |
| from typing import IO, TextIO, BinaryIO |
| from typing import Pattern, Match |
| import typing |
| |
| |
| class Employee: |
| pass |
| |
| |
| class Manager(Employee): |
| pass |
| |
| |
| class Founder(Employee): |
| pass |
| |
| |
| class ManagingFounder(Manager, Founder): |
| pass |
| |
| |
| class AnyTests(TestCase): |
| |
| def test_any_instance_type_error(self): |
| with self.assertRaises(TypeError): |
| isinstance(42, Any) |
| |
| def test_any_subclass(self): |
| self.assertTrue(issubclass(Employee, Any)) |
| self.assertTrue(issubclass(int, Any)) |
| self.assertTrue(issubclass(type(None), Any)) |
| self.assertTrue(issubclass(object, Any)) |
| |
| def test_others_any(self): |
| self.assertFalse(issubclass(Any, Employee)) |
| self.assertFalse(issubclass(Any, int)) |
| self.assertFalse(issubclass(Any, type(None))) |
| # However, Any is a subclass of object (this can't be helped). |
| self.assertTrue(issubclass(Any, object)) |
| |
| def test_repr(self): |
| self.assertEqual(repr(Any), 'typing.Any') |
| |
| def test_errors(self): |
| with self.assertRaises(TypeError): |
| issubclass(42, Any) |
| with self.assertRaises(TypeError): |
| Any[int] # Any is not a generic type. |
| |
| def test_cannot_subclass(self): |
| with self.assertRaises(TypeError): |
| class A(Any): |
| pass |
| |
| def test_cannot_instantiate(self): |
| with self.assertRaises(TypeError): |
| Any() |
| |
| def test_cannot_subscript(self): |
| with self.assertRaises(TypeError): |
| Any[int] |
| |
| def test_any_is_subclass(self): |
| # Any should be considered a subclass of everything. |
| assert issubclass(Any, Any) |
| assert issubclass(Any, typing.List) |
| assert issubclass(Any, typing.List[int]) |
| assert issubclass(Any, typing.List[T]) |
| assert issubclass(Any, typing.Mapping) |
| assert issubclass(Any, typing.Mapping[str, int]) |
| assert issubclass(Any, typing.Mapping[KT, VT]) |
| assert issubclass(Any, Generic) |
| assert issubclass(Any, Generic[T]) |
| assert issubclass(Any, Generic[KT, VT]) |
| assert issubclass(Any, AnyStr) |
| assert issubclass(Any, Union) |
| assert issubclass(Any, Union[int, str]) |
| assert issubclass(Any, typing.Match) |
| assert issubclass(Any, typing.Match[str]) |
| # These expressions must simply not fail. |
| typing.Match[Any] |
| typing.Pattern[Any] |
| typing.IO[Any] |
| |
| |
| class TypeVarTests(TestCase): |
| |
| def test_basic_plain(self): |
| T = TypeVar('T') |
| # Every class is a subclass of T. |
| assert issubclass(int, T) |
| assert issubclass(str, T) |
| # T equals itself. |
| assert T == T |
| # T is a subclass of itself. |
| assert issubclass(T, T) |
| # T is an instance of TypeVar |
| assert isinstance(T, TypeVar) |
| |
| def test_typevar_instance_type_error(self): |
| T = TypeVar('T') |
| with self.assertRaises(TypeError): |
| isinstance(42, T) |
| |
| def test_basic_constrained(self): |
| A = TypeVar('A', str, bytes) |
| # Only str and bytes are subclasses of A. |
| assert issubclass(str, A) |
| assert issubclass(bytes, A) |
| assert not issubclass(int, A) |
| # A equals itself. |
| assert A == A |
| # A is a subclass of itself. |
| assert issubclass(A, A) |
| |
| def test_constrained_error(self): |
| with self.assertRaises(TypeError): |
| X = TypeVar('X', int) |
| |
| def test_union_unique(self): |
| X = TypeVar('X') |
| Y = TypeVar('Y') |
| assert X != Y |
| assert Union[X] == X |
| assert Union[X] != Union[X, Y] |
| assert Union[X, X] == X |
| assert Union[X, int] != Union[X] |
| assert Union[X, int] != Union[int] |
| assert Union[X, int].__union_params__ == (X, int) |
| assert Union[X, int].__union_set_params__ == {X, int} |
| |
| def test_union_constrained(self): |
| A = TypeVar('A', str, bytes) |
| assert Union[A, str] != Union[A] |
| |
| def test_repr(self): |
| self.assertEqual(repr(T), '~T') |
| self.assertEqual(repr(KT), '~KT') |
| self.assertEqual(repr(VT), '~VT') |
| self.assertEqual(repr(AnyStr), '~AnyStr') |
| T_co = TypeVar('T_co', covariant=True) |
| self.assertEqual(repr(T_co), '+T_co') |
| T_contra = TypeVar('T_contra', contravariant=True) |
| self.assertEqual(repr(T_contra), '-T_contra') |
| |
| def test_no_redefinition(self): |
| self.assertNotEqual(TypeVar('T'), TypeVar('T')) |
| self.assertNotEqual(TypeVar('T', int, str), TypeVar('T', int, str)) |
| |
| def test_subclass_as_unions(self): |
| # None of these are true -- each type var is its own world. |
| self.assertFalse(issubclass(TypeVar('T', int, str), |
| TypeVar('T', int, str))) |
| self.assertFalse(issubclass(TypeVar('T', int, float), |
| TypeVar('T', int, float, str))) |
| self.assertFalse(issubclass(TypeVar('T', int, str), |
| TypeVar('T', str, int))) |
| A = TypeVar('A', int, str) |
| B = TypeVar('B', int, str, float) |
| self.assertFalse(issubclass(A, B)) |
| self.assertFalse(issubclass(B, A)) |
| |
| def test_cannot_subclass_vars(self): |
| with self.assertRaises(TypeError): |
| class V(TypeVar('T')): |
| pass |
| |
| def test_cannot_subclass_var_itself(self): |
| with self.assertRaises(TypeError): |
| class V(TypeVar): |
| pass |
| |
| def test_cannot_instantiate_vars(self): |
| with self.assertRaises(TypeError): |
| TypeVar('A')() |
| |
| def test_bound(self): |
| X = TypeVar('X', bound=Employee) |
| assert issubclass(Employee, X) |
| assert issubclass(Manager, X) |
| assert not issubclass(int, X) |
| |
| def test_bound_errors(self): |
| with self.assertRaises(TypeError): |
| TypeVar('X', bound=42) |
| with self.assertRaises(TypeError): |
| TypeVar('X', str, float, bound=Employee) |
| |
| |
| class UnionTests(TestCase): |
| |
| def test_basics(self): |
| u = Union[int, float] |
| self.assertNotEqual(u, Union) |
| self.assertTrue(issubclass(int, u)) |
| self.assertTrue(issubclass(float, u)) |
| |
| def test_union_any(self): |
| u = Union[Any] |
| self.assertEqual(u, Any) |
| u = Union[int, Any] |
| self.assertEqual(u, Any) |
| u = Union[Any, int] |
| self.assertEqual(u, Any) |
| |
| def test_union_object(self): |
| u = Union[object] |
| self.assertEqual(u, object) |
| u = Union[int, object] |
| self.assertEqual(u, object) |
| u = Union[object, int] |
| self.assertEqual(u, object) |
| |
| def test_union_any_object(self): |
| u = Union[object, Any] |
| self.assertEqual(u, Any) |
| u = Union[Any, object] |
| self.assertEqual(u, Any) |
| |
| def test_unordered(self): |
| u1 = Union[int, float] |
| u2 = Union[float, int] |
| self.assertEqual(u1, u2) |
| |
| def test_subclass(self): |
| u = Union[int, Employee] |
| self.assertTrue(issubclass(Manager, u)) |
| |
| def test_self_subclass(self): |
| self.assertTrue(issubclass(Union[KT, VT], Union)) |
| self.assertFalse(issubclass(Union, Union[KT, VT])) |
| |
| def test_multiple_inheritance(self): |
| u = Union[int, Employee] |
| self.assertTrue(issubclass(ManagingFounder, u)) |
| |
| def test_single_class_disappears(self): |
| t = Union[Employee] |
| self.assertIs(t, Employee) |
| |
| def test_base_class_disappears(self): |
| u = Union[Employee, Manager, int] |
| self.assertEqual(u, Union[int, Employee]) |
| u = Union[Manager, int, Employee] |
| self.assertEqual(u, Union[int, Employee]) |
| u = Union[Employee, Manager] |
| self.assertIs(u, Employee) |
| |
| def test_weird_subclasses(self): |
| u = Union[Employee, int, float] |
| v = Union[int, float] |
| self.assertTrue(issubclass(v, u)) |
| w = Union[int, Manager] |
| self.assertTrue(issubclass(w, u)) |
| |
| def test_union_union(self): |
| u = Union[int, float] |
| v = Union[u, Employee] |
| self.assertEqual(v, Union[int, float, Employee]) |
| |
| def test_repr(self): |
| self.assertEqual(repr(Union), 'typing.Union') |
| u = Union[Employee, int] |
| self.assertEqual(repr(u), 'typing.Union[%s.Employee, int]' % __name__) |
| u = Union[int, Employee] |
| self.assertEqual(repr(u), 'typing.Union[int, %s.Employee]' % __name__) |
| |
| def test_cannot_subclass(self): |
| with self.assertRaises(TypeError): |
| class C(Union): |
| pass |
| with self.assertRaises(TypeError): |
| class C(Union[int, str]): |
| pass |
| |
| def test_cannot_instantiate(self): |
| with self.assertRaises(TypeError): |
| Union() |
| u = Union[int, float] |
| with self.assertRaises(TypeError): |
| u() |
| |
| def test_optional(self): |
| o = Optional[int] |
| u = Union[int, None] |
| self.assertEqual(o, u) |
| |
| def test_empty(self): |
| with self.assertRaises(TypeError): |
| Union[()] |
| |
| def test_issubclass_union(self): |
| assert issubclass(Union[int, str], Union) |
| assert not issubclass(int, Union) |
| |
| def test_union_instance_type_error(self): |
| with self.assertRaises(TypeError): |
| isinstance(42, Union[int, str]) |
| |
| def test_union_str_pattern(self): |
| # Shouldn't crash; see http://bugs.python.org/issue25390 |
| A = Union[str, Pattern] |
| |
| |
| class TypeVarUnionTests(TestCase): |
| |
| def test_simpler(self): |
| A = TypeVar('A', int, str, float) |
| B = TypeVar('B', int, str) |
| assert issubclass(A, A) |
| assert issubclass(B, B) |
| assert not issubclass(B, A) |
| assert issubclass(A, Union[int, str, float]) |
| assert not issubclass(Union[int, str, float], A) |
| assert not issubclass(Union[int, str], B) |
| assert issubclass(B, Union[int, str]) |
| assert not issubclass(A, B) |
| assert not issubclass(Union[int, str, float], B) |
| assert not issubclass(A, Union[int, str]) |
| |
| def test_var_union_subclass(self): |
| self.assertTrue(issubclass(T, Union[int, T])) |
| self.assertTrue(issubclass(KT, Union[KT, VT])) |
| |
| def test_var_union(self): |
| TU = TypeVar('TU', Union[int, float], None) |
| assert issubclass(int, TU) |
| assert issubclass(float, TU) |
| |
| |
| class TupleTests(TestCase): |
| |
| def test_basics(self): |
| self.assertTrue(issubclass(Tuple[int, str], Tuple)) |
| self.assertTrue(issubclass(Tuple[int, str], Tuple[int, str])) |
| self.assertFalse(issubclass(int, Tuple)) |
| self.assertFalse(issubclass(Tuple[float, str], Tuple[int, str])) |
| self.assertFalse(issubclass(Tuple[int, str, int], Tuple[int, str])) |
| self.assertFalse(issubclass(Tuple[int, str], Tuple[int, str, int])) |
| self.assertTrue(issubclass(tuple, Tuple)) |
| self.assertFalse(issubclass(Tuple, tuple)) # Can't have it both ways. |
| |
| def test_tuple_subclass(self): |
| class MyTuple(tuple): |
| pass |
| self.assertTrue(issubclass(MyTuple, Tuple)) |
| |
| def test_tuple_instance_type_error(self): |
| with self.assertRaises(TypeError): |
| isinstance((0, 0), Tuple[int, int]) |
| with self.assertRaises(TypeError): |
| isinstance((0, 0), Tuple) |
| |
| def test_tuple_ellipsis_subclass(self): |
| |
| class B: |
| pass |
| |
| class C(B): |
| pass |
| |
| assert not issubclass(Tuple[B], Tuple[B, ...]) |
| assert issubclass(Tuple[C, ...], Tuple[B, ...]) |
| assert not issubclass(Tuple[C, ...], Tuple[B]) |
| assert not issubclass(Tuple[C], Tuple[B, ...]) |
| |
| def test_repr(self): |
| self.assertEqual(repr(Tuple), 'typing.Tuple') |
| self.assertEqual(repr(Tuple[()]), 'typing.Tuple[]') |
| self.assertEqual(repr(Tuple[int, float]), 'typing.Tuple[int, float]') |
| self.assertEqual(repr(Tuple[int, ...]), 'typing.Tuple[int, ...]') |
| |
| def test_errors(self): |
| with self.assertRaises(TypeError): |
| issubclass(42, Tuple) |
| with self.assertRaises(TypeError): |
| issubclass(42, Tuple[int]) |
| |
| |
| class CallableTests(TestCase): |
| |
| def test_self_subclass(self): |
| self.assertTrue(issubclass(Callable[[int], int], Callable)) |
| self.assertFalse(issubclass(Callable, Callable[[int], int])) |
| self.assertTrue(issubclass(Callable[[int], int], Callable[[int], int])) |
| self.assertFalse(issubclass(Callable[[Employee], int], |
| Callable[[Manager], int])) |
| self.assertFalse(issubclass(Callable[[Manager], int], |
| Callable[[Employee], int])) |
| self.assertFalse(issubclass(Callable[[int], Employee], |
| Callable[[int], Manager])) |
| self.assertFalse(issubclass(Callable[[int], Manager], |
| Callable[[int], Employee])) |
| |
| def test_eq_hash(self): |
| self.assertEqual(Callable[[int], int], Callable[[int], int]) |
| self.assertEqual(len({Callable[[int], int], Callable[[int], int]}), 1) |
| self.assertNotEqual(Callable[[int], int], Callable[[int], str]) |
| self.assertNotEqual(Callable[[int], int], Callable[[str], int]) |
| self.assertNotEqual(Callable[[int], int], Callable[[int, int], int]) |
| self.assertNotEqual(Callable[[int], int], Callable[[], int]) |
| self.assertNotEqual(Callable[[int], int], Callable) |
| |
| def test_cannot_subclass(self): |
| with self.assertRaises(TypeError): |
| |
| class C(Callable): |
| pass |
| |
| with self.assertRaises(TypeError): |
| |
| class C(Callable[[int], int]): |
| pass |
| |
| def test_cannot_instantiate(self): |
| with self.assertRaises(TypeError): |
| Callable() |
| c = Callable[[int], str] |
| with self.assertRaises(TypeError): |
| c() |
| |
| def test_callable_instance_works(self): |
| def f(): |
| pass |
| assert isinstance(f, Callable) |
| assert not isinstance(None, Callable) |
| |
| def test_callable_instance_type_error(self): |
| def f(): |
| pass |
| with self.assertRaises(TypeError): |
| assert isinstance(f, Callable[[], None]) |
| with self.assertRaises(TypeError): |
| assert isinstance(f, Callable[[], Any]) |
| with self.assertRaises(TypeError): |
| assert not isinstance(None, Callable[[], None]) |
| with self.assertRaises(TypeError): |
| assert not isinstance(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): |
| |
| 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(TestCase): |
| |
| def test_supports_int(self): |
| assert issubclass(int, typing.SupportsInt) |
| assert not issubclass(str, typing.SupportsInt) |
| |
| def test_supports_float(self): |
| assert issubclass(float, typing.SupportsFloat) |
| assert not issubclass(str, typing.SupportsFloat) |
| |
| def test_supports_complex(self): |
| |
| # Note: complex itself doesn't have __complex__. |
| class C: |
| def __complex__(self): |
| return 0j |
| |
| assert issubclass(C, typing.SupportsComplex) |
| assert not issubclass(str, typing.SupportsComplex) |
| |
| def test_supports_bytes(self): |
| |
| # Note: bytes itself doesn't have __bytes__. |
| class B: |
| def __bytes__(self): |
| return b'' |
| |
| assert issubclass(B, typing.SupportsBytes) |
| assert not issubclass(str, typing.SupportsBytes) |
| |
| def test_supports_abs(self): |
| assert issubclass(float, typing.SupportsAbs) |
| assert issubclass(int, typing.SupportsAbs) |
| assert not issubclass(str, typing.SupportsAbs) |
| |
| def test_supports_round(self): |
| assert issubclass(float, typing.SupportsRound) |
| assert issubclass(int, typing.SupportsRound) |
| assert not issubclass(str, typing.SupportsRound) |
| |
| def test_reversible(self): |
| assert issubclass(list, typing.Reversible) |
| assert not issubclass(int, typing.Reversible) |
| |
| def test_protocol_instance_type_error(self): |
| with self.assertRaises(TypeError): |
| isinstance([], typing.Reversible) |
| |
| |
| class GenericTests(TestCase): |
| |
| def test_basics(self): |
| X = SimpleMapping[str, Any] |
| Y = SimpleMapping[XK, str] |
| X[str, str] |
| Y[str, str] |
| with self.assertRaises(TypeError): |
| X[int, str] |
| with self.assertRaises(TypeError): |
| Y[str, bytes] |
| |
| 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_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): |
| T = TypeVar('T') |
| class B(Generic[T]): |
| pass |
| global C # pickle wants to reference the class by name |
| 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 |
| |
| assert C.__module__ == __name__ |
| if not PY32: |
| assert C.__qualname__ == 'GenericTests.test_repr_2.<locals>.C' |
| assert repr(C).split('.')[-1] == 'C[~T]' |
| X = C[int] |
| assert X.__module__ == __name__ |
| if not PY32: |
| assert X.__qualname__ == 'C' |
| assert repr(X).split('.')[-1] == 'C[int]' |
| |
| class Y(C[int]): |
| pass |
| |
| assert Y.__module__ == __name__ |
| if not PY32: |
| assert Y.__qualname__ == 'GenericTests.test_repr_2.<locals>.Y' |
| assert repr(Y).split('.')[-1] == 'Y[int]' |
| |
| def test_eq_1(self): |
| assert Generic == Generic |
| assert Generic[T] == Generic[T] |
| assert Generic[KT] != Generic[VT] |
| |
| def test_eq_2(self): |
| |
| class A(Generic[T]): |
| pass |
| |
| class B(Generic[T]): |
| pass |
| |
| assert A == A |
| assert A != B |
| assert A[T] == A[T] |
| assert A[T] != B[T] |
| |
| def test_multiple_inheritance(self): |
| |
| class A(Generic[T, VT]): |
| pass |
| |
| class B(Generic[KT, T]): |
| pass |
| |
| class C(A, Generic[KT, VT], B): |
| pass |
| |
| assert C.__parameters__ == (T, VT, KT) |
| |
| def test_nested(self): |
| |
| class G(Generic): |
| pass |
| |
| 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) |
| assert 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) |
| assert type(a) is Node |
| assert type(b) is Node |
| assert type(c) is Node |
| |
| foo(42) |
| |
| |
| class VarianceTests(TestCase): |
| |
| def test_invariance(self): |
| # Because of invariance, List[subclass of X] is not a subclass |
| # of List[X], and ditto for MutableSequence. |
| assert not issubclass(typing.List[Manager], typing.List[Employee]) |
| assert not issubclass(typing.MutableSequence[Manager], |
| typing.MutableSequence[Employee]) |
| # It's still reflexive. |
| assert issubclass(typing.List[Employee], typing.List[Employee]) |
| assert issubclass(typing.MutableSequence[Employee], |
| typing.MutableSequence[Employee]) |
| |
| def test_covariance_tuple(self): |
| # Check covariace for Tuple (which are really special cases). |
| assert issubclass(Tuple[Manager], Tuple[Employee]) |
| assert not issubclass(Tuple[Employee], Tuple[Manager]) |
| # And pairwise. |
| assert issubclass(Tuple[Manager, Manager], Tuple[Employee, Employee]) |
| assert not issubclass(Tuple[Employee, Employee], |
| Tuple[Manager, Employee]) |
| # And using ellipsis. |
| assert issubclass(Tuple[Manager, ...], Tuple[Employee, ...]) |
| assert not issubclass(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). |
| assert issubclass(typing.Sequence[Manager], typing.Sequence[Employee]) |
| assert not issubclass(typing.Sequence[Employee], |
| typing.Sequence[Manager]) |
| |
| def test_covariance_mapping(self): |
| # Ditto for Mapping (covariant in the value, invariant in the key). |
| assert issubclass(typing.Mapping[Employee, Manager], |
| typing.Mapping[Employee, Employee]) |
| assert not issubclass(typing.Mapping[Manager, Employee], |
| typing.Mapping[Employee, Employee]) |
| assert not issubclass(typing.Mapping[Employee, Manager], |
| typing.Mapping[Manager, Manager]) |
| assert not issubclass(typing.Mapping[Manager, Employee], |
| typing.Mapping[Manager, Manager]) |
| |
| |
| class CastTests(TestCase): |
| |
| def test_basics(self): |
| assert cast(int, 42) == 42 |
| assert cast(float, 42) == 42 |
| assert type(cast(float, 42)) is int |
| assert cast(Any, 42) == 42 |
| assert cast(list, 42) == 42 |
| assert cast(Union[str, float], 42) == 42 |
| assert cast(AnyStr, 42) == 42 |
| assert cast(None, 42) == 42 |
| |
| def test_errors(self): |
| # Bogus calls are not expected to fail. |
| cast(42, 42) |
| cast('hello', 42) |
| |
| |
| class ForwardRefTests(TestCase): |
| |
| 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()) |
| assert both_hints['left'] == both_hints['right'] == Optional[Node[T]] |
| assert both_hints['stuff'] == Optional[int] |
| assert 'blah' not in both_hints |
| |
| left_hints = get_type_hints(t.add_left, globals(), locals()) |
| assert left_hints['node'] == Optional[Node[T]] |
| |
| right_hints = get_type_hints(t.add_right, globals(), locals()) |
| assert 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) |
| assert hints == {'a': ns['C'], 'return': ns['D']} |
| |
| |
| class OverloadTests(TestCase): |
| |
| 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 |
| |
| |
| 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 |
| |
| |
| class CollectionsAbcTests(TestCase): |
| |
| def test_hashable(self): |
| assert isinstance(42, typing.Hashable) |
| assert not isinstance([], typing.Hashable) |
| |
| def test_iterable(self): |
| assert isinstance([], typing.Iterable) |
| # Due to ABC caching, the second time takes a separate code |
| # path and could fail. So call this a few times. |
| assert isinstance([], typing.Iterable) |
| assert isinstance([], typing.Iterable) |
| assert isinstance([], typing.Iterable[int]) |
| assert not isinstance(42, typing.Iterable) |
| # Just in case, also test issubclass() a few times. |
| assert issubclass(list, typing.Iterable) |
| assert issubclass(list, typing.Iterable) |
| |
| def test_iterator(self): |
| it = iter([]) |
| assert isinstance(it, typing.Iterator) |
| assert isinstance(it, typing.Iterator[int]) |
| assert not isinstance(42, typing.Iterator) |
| |
| def test_awaitable(self): |
| async def foo() -> typing.Awaitable[int]: |
| return await AwaitableWrapper(42) |
| g = foo() |
| assert issubclass(type(g), typing.Awaitable[int]) |
| assert isinstance(g, typing.Awaitable) |
| assert not isinstance(foo, typing.Awaitable) |
| assert issubclass(typing.Awaitable[Manager], |
| typing.Awaitable[Employee]) |
| assert not issubclass(typing.Awaitable[Employee], |
| typing.Awaitable[Manager]) |
| g.send(None) # Run foo() till completion, to avoid warning. |
| |
| def test_async_iterable(self): |
| base_it = range(10) # type: Iterator[int] |
| it = AsyncIteratorWrapper(base_it) |
| assert isinstance(it, typing.AsyncIterable) |
| assert isinstance(it, typing.AsyncIterable) |
| assert issubclass(typing.AsyncIterable[Manager], |
| typing.AsyncIterable[Employee]) |
| assert not isinstance(42, typing.AsyncIterable) |
| |
| def test_async_iterator(self): |
| base_it = range(10) # type: Iterator[int] |
| it = AsyncIteratorWrapper(base_it) |
| assert isinstance(it, typing.AsyncIterator) |
| assert issubclass(typing.AsyncIterator[Manager], |
| typing.AsyncIterator[Employee]) |
| assert not isinstance(42, typing.AsyncIterator) |
| |
| def test_sized(self): |
| assert isinstance([], typing.Sized) |
| assert not isinstance(42, typing.Sized) |
| |
| def test_container(self): |
| assert isinstance([], typing.Container) |
| assert not isinstance(42, typing.Container) |
| |
| def test_abstractset(self): |
| assert isinstance(set(), typing.AbstractSet) |
| assert not isinstance(42, typing.AbstractSet) |
| |
| def test_mutableset(self): |
| assert isinstance(set(), typing.MutableSet) |
| assert not isinstance(frozenset(), typing.MutableSet) |
| |
| def test_mapping(self): |
| assert isinstance({}, typing.Mapping) |
| assert not isinstance(42, typing.Mapping) |
| |
| def test_mutablemapping(self): |
| assert isinstance({}, typing.MutableMapping) |
| assert not isinstance(42, typing.MutableMapping) |
| |
| def test_sequence(self): |
| assert isinstance([], typing.Sequence) |
| assert not isinstance(42, typing.Sequence) |
| |
| def test_mutablesequence(self): |
| assert isinstance([], typing.MutableSequence) |
| assert not isinstance((), typing.MutableSequence) |
| |
| def test_bytestring(self): |
| assert isinstance(b'', typing.ByteString) |
| assert isinstance(bytearray(b''), typing.ByteString) |
| |
| def test_list(self): |
| assert issubclass(list, typing.List) |
| |
| def test_set(self): |
| assert issubclass(set, typing.Set) |
| assert not issubclass(frozenset, typing.Set) |
| |
| def test_frozenset(self): |
| assert issubclass(frozenset, typing.FrozenSet) |
| assert not issubclass(set, typing.FrozenSet) |
| |
| def test_dict(self): |
| assert issubclass(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_instantiation(self): |
| |
| class MyList(typing.List[int]): |
| pass |
| |
| a = MyList() |
| assert isinstance(a, 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_instantiation(self): |
| |
| class MyDict(typing.Dict[str, int]): |
| pass |
| |
| d = MyDict() |
| assert isinstance(d, MyDict) |
| |
| 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() |
| assert isinstance(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() |
| assert isinstance(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() |
| assert issubclass(type(g), typing.Generator) |
| assert issubclass(typing.Generator[Manager, Employee, Manager], |
| typing.Generator[Employee, Manager, Employee]) |
| assert not issubclass(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 |
| |
| assert len(MMC()) == 0 |
| |
| class MMB(typing.MutableMapping[KT, VT]): |
| def __len__(self): |
| return 0 |
| |
| assert len(MMB()) == 0 |
| assert len(MMB[str, str]()) == 0 |
| assert len(MMB[KT, VT]()) == 0 |
| |
| |
| class NamedTupleTests(TestCase): |
| |
| def test_basics(self): |
| Emp = NamedTuple('Emp', [('name', str), ('id', int)]) |
| assert issubclass(Emp, tuple) |
| joe = Emp('Joe', 42) |
| jim = Emp(name='Jim', id=1) |
| assert isinstance(joe, Emp) |
| assert isinstance(joe, tuple) |
| assert joe.name == 'Joe' |
| assert joe.id == 42 |
| assert jim.name == 'Jim' |
| assert jim.id == 1 |
| assert Emp.__name__ == 'Emp' |
| assert Emp._fields == ('name', 'id') |
| assert 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(TestCase): |
| |
| def test_io(self): |
| |
| def stuff(a: IO) -> AnyStr: |
| return a.readline() |
| |
| a = stuff.__annotations__['a'] |
| assert a.__parameters__ == (AnyStr,) |
| |
| def test_textio(self): |
| |
| def stuff(a: TextIO) -> str: |
| return a.readline() |
| |
| a = stuff.__annotations__['a'] |
| assert a.__parameters__ == (str,) |
| |
| def test_binaryio(self): |
| |
| def stuff(a: BinaryIO) -> bytes: |
| return a.readline() |
| |
| a = stuff.__annotations__['a'] |
| assert a.__parameters__ == (bytes,) |
| |
| def test_io_submodule(self): |
| from typing.io import IO, TextIO, BinaryIO, __all__, __name__ |
| assert IO is typing.IO |
| assert TextIO is typing.TextIO |
| assert BinaryIO is typing.BinaryIO |
| assert set(__all__) == set(['IO', 'TextIO', 'BinaryIO']) |
| assert __name__ == 'typing.io' |
| |
| |
| class RETests(TestCase): |
| # Much of this is really testing _TypeAlias. |
| |
| def test_basics(self): |
| pat = re.compile('[a-z]+', re.I) |
| assert issubclass(pat.__class__, Pattern) |
| assert issubclass(type(pat), Pattern) |
| assert issubclass(type(pat), Pattern[str]) |
| |
| mat = pat.search('12345abcde.....') |
| assert issubclass(mat.__class__, Match) |
| assert issubclass(mat.__class__, Match[str]) |
| assert issubclass(mat.__class__, Match[bytes]) # Sad but true. |
| assert issubclass(type(mat), Match) |
| assert issubclass(type(mat), Match[str]) |
| |
| p = Pattern[Union[str, bytes]] |
| assert issubclass(Pattern[str], Pattern) |
| assert issubclass(Pattern[str], p) |
| |
| m = Match[Union[bytes, str]] |
| assert issubclass(Match[bytes], Match) |
| assert issubclass(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): |
| assert repr(Pattern) == 'Pattern[~AnyStr]' |
| assert repr(Pattern[str]) == 'Pattern[str]' |
| assert repr(Pattern[bytes]) == 'Pattern[bytes]' |
| assert repr(Match) == 'Match[~AnyStr]' |
| assert repr(Match[str]) == 'Match[str]' |
| assert repr(Match[bytes]) == 'Match[bytes]' |
| |
| def test_re_submodule(self): |
| from typing.re import Match, Pattern, __all__, __name__ |
| assert Match is typing.Match |
| assert Pattern is typing.Pattern |
| assert set(__all__) == set(['Match', 'Pattern']) |
| assert __name__ == 'typing.re' |
| |
| def test_cannot_subclass(self): |
| with self.assertRaises(TypeError) as ex: |
| |
| class A(typing.Match): |
| pass |
| |
| assert str(ex.exception) == "A type alias cannot be subclassed" |
| |
| |
| class AllTests(TestCase): |
| """Tests for __all__.""" |
| |
| def test_all(self): |
| from typing import __all__ as a |
| # Just spot-check the first and last of every category. |
| assert 'AbstractSet' in a |
| assert 'ValuesView' in a |
| assert 'cast' in a |
| assert 'overload' in a |
| assert 'io' in a |
| assert 're' in a |
| # Spot-check that stdlib modules aren't exported. |
| assert 'os' not in a |
| assert 'sys' not in a |
| |
| |
| if __name__ == '__main__': |
| main() |