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from __future__ import annotations
import multiprocessing
from typing import TYPE_CHECKING
from tox.util.cpu import auto_detect_cpus
if TYPE_CHECKING:
from pytest_mock import MockerFixture
def test_auto_detect_cpus() -> None:
num_cpus_actual = multiprocessing.cpu_count()
assert auto_detect_cpus() == num_cpus_actual
def test_auto_detect_cpus_returns_one_when_cpu_count_throws(mocker: MockerFixture) -> None:
mocker.patch.object(multiprocessing, "cpu_count", side_effect=NotImplementedError)
assert auto_detect_cpus() == 1
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