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import collections
import sys
import types
import typing
import warnings
from collections.abc import Callable
from typing import Any, ForwardRef, NewType, TypeVar
import pytest
import typing_extensions
from typing_extensions import (
ParamSpec,
ParamSpecArgs,
ParamSpecKwargs,
TypeAlias,
TypeAliasType,
TypeVarTuple,
deprecated,
)
from typing_inspection import typing_objects
CheckFunction: TypeAlias = Callable[[Any], bool]
names_and_functions: list[tuple[str, CheckFunction]] = [
('Annotated', typing_objects.is_annotated),
('Any', typing_objects.is_any),
('ClassVar', typing_objects.is_classvar),
('Concatenate', typing_objects.is_concatenate),
('Final', typing_objects.is_final),
('Generic', typing_objects.is_generic),
('Literal', typing_objects.is_literal),
('LiteralString', typing_objects.is_literalstring),
('Never', typing_objects.is_never),
('NoDefault', typing_objects.is_nodefault),
('NoExtraItems', typing_objects.is_noextraitems),
('NoReturn', typing_objects.is_noreturn),
('NotRequired', typing_objects.is_notrequired),
('ReadOnly', typing_objects.is_readonly),
('Required', typing_objects.is_required),
('Self', typing_objects.is_self),
('TypeAlias', typing_objects.is_typealias),
('TypeGuard', typing_objects.is_typeguard),
('TypeIs', typing_objects.is_typeis),
('Union', typing_objects.is_union),
('Unpack', typing_objects.is_unpack),
]
identity_member_checks: list[tuple[CheckFunction, Any, bool]] = []
for typing_name, function in names_and_functions:
if hasattr(typing, typing_name):
identity_member_checks.append((function, getattr(typing, typing_name), True))
if hasattr(typing_extensions, typing_name):
identity_member_checks.append((function, getattr(typing_extensions, typing_name), True))
@pytest.mark.parametrize(
['function', 'member', 'result'],
identity_member_checks,
)
def test_identity_member_check(function: CheckFunction, member: Any, result: bool) -> None:
assert function(member) == result
class TypingNamedTuple(typing.NamedTuple):
pass
class TypingExtensionsNamedTuple(typing_extensions.NamedTuple):
pass
CollectionsNamedTuple = collections.namedtuple('CollectionsNamedTuple', []) # pyright: ignore[reportUntypedNamedTuple] # noqa: PYI024
@pytest.mark.parametrize('nt_class', [TypingNamedTuple, TypingExtensionsNamedTuple, CollectionsNamedTuple])
def test_is_namedtuple(nt_class: type[Any]) -> None:
assert typing_objects.is_namedtuple(nt_class)
TypingNewType = typing.NewType('TypingNewType', int)
TypingExtensionsNewType = typing.NewType('TypingExtensionsNewType', str)
@pytest.mark.parametrize(
'new_type',
[TypingNewType, TypingExtensionsNewType],
)
def test_is_newtype(new_type: NewType) -> None:
assert typing_objects.is_newtype(new_type)
TypingExtensionsP = typing_extensions.ParamSpec('TypingExtensionsP')
param_specs: list[ParamSpec] = [TypingExtensionsP]
if sys.version_info >= (3, 10):
TypingP = typing.ParamSpec('TypingP')
param_specs.append(TypingP)
@pytest.mark.parametrize(
'param_spec',
param_specs,
)
def test_is_paramspec(param_spec: ParamSpec) -> None:
assert typing_objects.is_paramspec(param_spec)
@pytest.mark.parametrize(
'param_spec_args',
[p.args for p in param_specs],
)
def test_is_paramspecargs(param_spec_args: ParamSpecArgs) -> None:
assert typing_objects.is_paramspecargs(param_spec_args)
@pytest.mark.parametrize(
'param_spec_kwargs',
[p.kwargs for p in param_specs],
)
def test_is_paramspeckwargs(param_spec_kwargs: ParamSpecKwargs) -> None:
assert typing_objects.is_paramspeckwargs(param_spec_kwargs)
@pytest.mark.parametrize(
'forwardref',
[typing.ForwardRef('T'), typing_extensions.ForwardRef('T')],
)
def test_is_forwardref(forwardref: ForwardRef) -> None:
assert typing_objects.is_forwardref(forwardref)
T = TypeVar('T')
TypingExtensionsTypeAliasType = typing_extensions.TypeAliasType('TypingExtensionsTypeAliasType', int, type_params=(T,))
type_alias_types: list[TypeAliasType] = [TypingExtensionsTypeAliasType]
if sys.version_info >= (3, 12):
TypingTypeAliasType = typing_extensions.TypeAliasType('TypingTypeAliasType', int, type_params=(T,))
type_alias_types.append(TypingTypeAliasType)
@pytest.mark.parametrize(
'type_alias_type',
type_alias_types,
)
def test_is_typealiastype(type_alias_type: TypeAliasType) -> None:
assert typing_objects.is_typealiastype(type_alias_type)
# See Python 3.10 comment in the implementation:
assert not typing_objects.is_typealiastype(type_alias_type[int])
TypingTypeVar = typing.TypeVar('TypingTypeVar')
TypingExtensionsTypeVar = typing_extensions.TypeVar('TypingExtensionsTypeVar')
@pytest.mark.parametrize(
'type_var',
[TypingTypeVar, TypingExtensionsTypeVar],
)
def test_is_typevar(type_var: TypeVar) -> None:
assert typing_objects.is_typevar(type_var)
TypingExtensionsTypeVarTuple = typing_extensions.TypeVarTuple('TypingExtensionsTypeVarTuple')
type_var_tuples: list[TypeVarTuple] = [TypingExtensionsTypeVarTuple]
if sys.version_info >= (3, 11):
TypingTypeVarTuple = typing.TypeVarTuple('TypingTypeVarTuple')
type_var_tuples.append(TypingTypeVarTuple)
@pytest.mark.parametrize(
'type_var_tuple',
type_var_tuples,
)
def test_is_typevartuple(type_var_tuple: TypeVarTuple) -> None:
assert typing_objects.is_typevartuple(type_var_tuple)
deprecated_types: list[deprecated] = [typing_extensions.deprecated('deprecated')]
if sys.version_info >= (3, 13):
deprecated_types.append(warnings.deprecated('deprecated'))
@pytest.mark.parametrize(
'deprecated',
deprecated_types,
)
def test_is_deprecated(deprecated: deprecated) -> None:
assert typing_objects.is_deprecated(deprecated)
# Misc. tests:
@pytest.mark.skipif(
sys.version_info < (3, 10) or sys.version_info >= (3, 14),
reason=(
'`types.UnionType` is only available in Python 3.10. '
'In Python 3.14, `typing.Union` is an alias for `types.UnionType`.'
),
)
def test_is_union_does_not_match_uniontype() -> None:
assert not typing_objects.is_union(types.UnionType)
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