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d94d816d96
Fixes #ISSUE_NUMBER Pull Request resolved: https://github.com/pytorch/pytorch/pull/145820 Approved by: https://github.com/malfet
108 lines
3.8 KiB
Python
108 lines
3.8 KiB
Python
from __future__ import annotations
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import contextlib
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import os
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import typing
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import unittest
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import unittest.mock
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import tools.setup_helpers.cmake
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import tools.setup_helpers.env # noqa: F401 unused but resolves circular import
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if typing.TYPE_CHECKING:
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from collections.abc import Iterator, Sequence
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T = typing.TypeVar("T")
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class TestCMake(unittest.TestCase):
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@unittest.mock.patch("multiprocessing.cpu_count")
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def test_build_jobs(self, mock_cpu_count: unittest.mock.MagicMock) -> None:
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"""Tests that the number of build jobs comes out correctly."""
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mock_cpu_count.return_value = 13
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cases = [
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# MAX_JOBS, USE_NINJA, IS_WINDOWS, want
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(("8", True, False), ["-j", "8"]), # noqa: E201,E241
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((None, True, False), None), # noqa: E201,E241
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(("7", False, False), ["-j", "7"]), # noqa: E201,E241
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((None, False, False), ["-j", "13"]), # noqa: E201,E241
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(("6", True, True), ["-j", "6"]), # noqa: E201,E241
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((None, True, True), None), # noqa: E201,E241
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(("11", False, True), ["-j", "11"]), # noqa: E201,E241
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((None, False, True), ["-j", "13"]), # noqa: E201,E241
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]
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for (max_jobs, use_ninja, is_windows), want in cases:
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with self.subTest(
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MAX_JOBS=max_jobs, USE_NINJA=use_ninja, IS_WINDOWS=is_windows
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):
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with contextlib.ExitStack() as stack:
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stack.enter_context(env_var("MAX_JOBS", max_jobs))
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stack.enter_context(
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unittest.mock.patch.object(
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tools.setup_helpers.cmake, "USE_NINJA", use_ninja
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)
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)
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stack.enter_context(
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unittest.mock.patch.object(
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tools.setup_helpers.cmake, "IS_WINDOWS", is_windows
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)
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)
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cmake = tools.setup_helpers.cmake.CMake()
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with unittest.mock.patch.object(cmake, "run") as cmake_run:
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cmake.build({})
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cmake_run.assert_called_once()
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(call,) = cmake_run.mock_calls
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build_args, _ = call.args
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if want is None:
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self.assertNotIn("-j", build_args)
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else:
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self.assert_contains_sequence(build_args, want)
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@staticmethod
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def assert_contains_sequence(
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sequence: Sequence[T], subsequence: Sequence[T]
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) -> None:
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"""Raises an assertion if the subsequence is not contained in the sequence."""
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if len(subsequence) == 0:
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return # all sequences contain the empty subsequence
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# Iterate over all windows of len(subsequence). Stop if the
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# window matches.
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for i in range(len(sequence) - len(subsequence) + 1):
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candidate = sequence[i : i + len(subsequence)]
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assert len(candidate) == len(subsequence) # sanity check
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if candidate == subsequence:
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return # found it
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raise AssertionError(f"{subsequence} not found in {sequence}")
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@contextlib.contextmanager
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def env_var(key: str, value: str | None) -> Iterator[None]:
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"""Sets/clears an environment variable within a Python context."""
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# Get the previous value and then override it.
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previous_value = os.environ.get(key)
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set_env_var(key, value)
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try:
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yield
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finally:
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# Restore to previous value.
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set_env_var(key, previous_value)
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def set_env_var(key: str, value: str | None) -> None:
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"""Sets/clears an environment variable."""
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if value is None:
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os.environ.pop(key, None)
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else:
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os.environ[key] = value
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if __name__ == "__main__":
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unittest.main()
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