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import os.path
import subprocess
import sys
import textwrap
from contextlib import contextmanager
from pathlib import Path
from string import ascii_lowercase
from _pytest.pytester import Pytester
@contextmanager
def subst_path_windows(filepath: Path):
for c in ascii_lowercase[7:]: # Create a subst drive from H-Z.
c += ":"
if not os.path.exists(c):
drive = c
break
else:
raise AssertionError("Unable to find suitable drive letter for subst.")
directory = filepath.parent
basename = filepath.name
args = ["subst", drive, str(directory)]
subprocess.check_call(args)
assert os.path.exists(drive)
try:
filename = Path(drive, os.sep, basename)
yield filename
finally:
args = ["subst", "/D", drive]
subprocess.check_call(args)
@contextmanager
def subst_path_linux(filepath: Path):
directory = filepath.parent
basename = filepath.name
target = directory / ".." / "sub2"
os.symlink(str(directory), str(target), target_is_directory=True)
try:
filename = target / basename
yield filename
finally:
# We don't need to unlink (it's all in the tempdir).
pass
def test_link_resolve(pytester: Pytester) -> None:
"""See: https://github.com/pytest-dev/pytest/issues/5965."""
sub1 = pytester.mkpydir("sub1")
p = sub1.joinpath("test_foo.py")
p.write_text(
textwrap.dedent(
"""
import pytest
def test_foo():
raise AssertionError()
"""
)
)
subst = subst_path_linux
if sys.platform == "win32":
subst = subst_path_windows
with subst(p) as subst_p:
result = pytester.runpytest(str(subst_p), "-v")
# i.e.: Make sure that the error is reported as a relative path, not as a
# resolved path.
# See: https://github.com/pytest-dev/pytest/issues/5965
stdout = result.stdout.str()
assert "sub1/test_foo.py" not in stdout
# i.e.: Expect drive on windows because we just have drive:filename, whereas
# we expect a relative path on Linux.
expect = f"*{subst_p}*" if sys.platform == "win32" else "*sub2/test_foo.py*"
result.stdout.fnmatch_lines([expect])
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