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