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"""Test the runtime usage of `numpy.typing`."""
from __future__ import annotations
import sys
from typing import get_type_hints, Union, NamedTuple, get_args, get_origin
import pytest
import numpy as np
import numpy.typing as npt
class TypeTup(NamedTuple):
typ: type
args: tuple[type, ...]
origin: None | type
if sys.version_info >= (3, 9):
NDArrayTup = TypeTup(npt.NDArray, npt.NDArray.__args__, np.ndarray)
else:
NDArrayTup = TypeTup(npt.NDArray, (), None)
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
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