import os.path import subprocess import sys import textwrap from contextlib import contextmanager from string import ascii_lowercase import py.path from _pytest import pytester @contextmanager def subst_path_windows(filename): 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 = filename.dirpath() basename = filename.basename args = ["subst", drive, str(directory)] subprocess.check_call(args) assert os.path.exists(drive) try: filename = py.path.local(drive) / basename yield filename finally: args = ["subst", "/D", drive] subprocess.check_call(args) @contextmanager def subst_path_linux(filename): directory = filename.dirpath() basename = filename.basename 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(testdir: pytester.Testdir) -> None: """ See: https://github.com/pytest-dev/pytest/issues/5965 """ sub1 = testdir.mkpydir("sub1") p = sub1.join("test_foo.py") p.write( 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 = testdir.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 = ( "*{}*".format(subst_p) if sys.platform == "win32" else "*sub2/test_foo.py*" ) result.stdout.fnmatch_lines([expect])