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improve coverage a bit

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This commit is contained in:
Anthony Sottile 2021-11-14 09:35:49 -08:00
parent 639dfe1671
commit bb3c8d2607
3 changed files with 50 additions and 21 deletions
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31
tests/unit/test_checker_manager.py
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@ -1,5 +1,6 @@
"""Tests for the Manager object for FileCheckers."""
import errno
import multiprocessing
from unittest import mock
import pytest
@ -37,8 +38,8 @@ def test_oserrors_cause_serial_fall_back():
assert serial.call_count == 1
@mock.patch("flake8.checker._multiprocessing_is_fork", return_value=True)
def test_oserrors_are_reraised(is_windows):
@mock.patch.object(multiprocessing, "get_start_method", return_value="fork")
def test_oserrors_are_reraised(_):
"""Verify that unexpected OSErrors will cause the Manager to reraise."""
err = OSError(errno.EAGAIN, "Ominous message")
with mock.patch("_multiprocessing.SemLock", side_effect=err):
@ -49,15 +50,30 @@ def test_oserrors_are_reraised(is_windows):
assert serial.call_count == 0
def test_multiprocessing_is_disabled():
@mock.patch.object(multiprocessing, "get_start_method", return_value="spawn")
def test_multiprocessing_is_disabled(_):
"""Verify not being able to import multiprocessing forces jobs to 0."""
style_guide = style_guide_mock()
with mock.patch("flake8.checker.multiprocessing", None):
manager = checker.Manager(style_guide, [], [])
assert manager.jobs == 0
def test_multiprocessing_cpu_count_not_implemented():
"""Verify that jobs is 0 if cpu_count is unavailable."""
style_guide = style_guide_mock()
style_guide.options.jobs = JobsArgument("auto")
with mock.patch.object(
multiprocessing,
"cpu_count",
side_effect=NotImplementedError,
):
manager = checker.Manager(style_guide, [], [])
assert manager.jobs == 0
assert manager.jobs == 0
def test_make_checkers():
@mock.patch.object(multiprocessing, "get_start_method", return_value="spawn")
def test_make_checkers(_):
"""Verify that we create a list of FileChecker instances."""
style_guide = style_guide_mock()
files = ["file1", "file2"]
@ -67,8 +83,7 @@ def test_make_checkers():
"logical_line_plugins": [],
"physical_line_plugins": [],
}
with mock.patch("flake8.checker.multiprocessing", None):
manager = checker.Manager(style_guide, files, checkplugins)
manager = checker.Manager(style_guide, files, checkplugins)
with mock.patch("flake8.utils.filenames_from") as filenames_from:
filenames_from.side_effect = [["file1"], ["file2"]]