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test_runtime.py
"""Test the runtime usage of `numpy.typing`.""" from __future__ import annotations from typing import ( get_type_hints, Union, NamedTuple, get_args, get_origin, Any, ) import pytest import numpy as np import numpy.typing as npt import numpy._typing as _npt class TypeTup(NamedTuple): typ: type args: tuple[type, ...] origin: None | type NDArrayTup = TypeTup(npt.NDArray, npt.NDArray.__args__, np.ndarray) TYPES = { "ArrayLike": TypeTup(npt.ArrayLike, npt.ArrayLike.__args__, Union), "DTypeLike": TypeTup(npt.DTypeLike, npt.DTypeLike.__args__, Union), "NBitBase": TypeTup(npt.NBitBase, (), None), "NDArray": NDArrayTup, } @pytest.mark.parametrize("name,tup", TYPES.items(), ids=TYPES.keys()) def test_get_args(name: type, tup: TypeTup) -> None: """Test `typing.get_args`.""" typ, ref = tup.typ, tup.args out = get_args(typ) assert out == ref @pytest.mark.parametrize("name,tup", TYPES.items(), ids=TYPES.keys()) def test_get_origin(name: type, tup: TypeTup) -> None: """Test `typing.get_origin`.""" typ, ref = tup.typ, tup.origin out = get_origin(typ) assert out == ref @pytest.mark.parametrize("name,tup", TYPES.items(), ids=TYPES.keys()) def test_get_type_hints(name: type, tup: TypeTup) -> None: """Test `typing.get_type_hints`.""" typ = tup.typ # Explicitly set `__annotations__` in order to circumvent the # stringification performed by `from __future__ import annotations` def func(a): pass func.__annotations__ = {"a": typ, "return": None} out = get_type_hints(func) ref = {"a": typ, "return": type(None)} assert out == ref @pytest.mark.parametrize("name,tup", TYPES.items(), ids=TYPES.keys()) def test_get_type_hints_str(name: type, tup: TypeTup) -> None: """Test `typing.get_type_hints` with string-representation of types.""" typ_str, typ = f"npt.{name}", tup.typ # Explicitly set `__annotations__` in order to circumvent the # stringification performed by `from __future__ import annotations` def func(a): pass func.__annotations__ = {"a": typ_str, "return": None} out = get_type_hints(func) ref = {"a": typ, "return": type(None)} assert out == ref def test_keys() -> None: """Test that ``TYPES.keys()`` and ``numpy.typing.__all__`` are synced.""" keys = TYPES.keys() ref = set(npt.__all__) assert keys == ref PROTOCOLS: dict[str, tuple[type[Any], object]] = { "_SupportsDType": (_npt._SupportsDType, np.int64(1)), "_SupportsArray": (_npt._SupportsArray, np.arange(10)), "_SupportsArrayFunc": (_npt._SupportsArrayFunc, np.arange(10)), "_NestedSequence": (_npt._NestedSequence, [1]), } @pytest.mark.parametrize("cls,obj", PROTOCOLS.values(), ids=PROTOCOLS.keys()) class TestRuntimeProtocol: def test_isinstance(self, cls: type[Any], obj: object) -> None: assert isinstance(obj, cls) assert not isinstance(None, cls) def test_issubclass(self, cls: type[Any], obj: object) -> None: if cls is _npt._SupportsDType: pytest.xfail( "Protocols with non-method members don't support issubclass()" ) assert issubclass(type(obj), cls) assert not issubclass(type(None), cls)
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