Tests: Fix Windows compatibility in unit test suite - #3722
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On Windows, Python's urlparse treats paths like 'C:\Users\...' as having scheme='c', which causes 'Unrecognized filesystem type in URI: c' errors. This adds a platform-guarded predicate that detects single-character alphabetic schemes on Windows and remaps them to 'file', enabling correct local filesystem routing. Fixes all three parse sites (_infer_file_io_from_scheme, PyArrowFileIO.parse_location, FsspecFileIO._get_fs_from_uri) and includes platform-conditional tests. Related: apache#2477, apache#1005
Enable the full unit test suite to pass on Windows (3803 passed, 0 failures). Changes: - Reduce RANDOM_LENGTH from 20 to 8 to stay under Windows MAX_PATH (260 chars) - Use warehouse.as_posix() in SQLite URIs for cross-platform path formatting - Close file handles before temp directory cleanup (Windows file locking) - Use os.path.abspath() in path assertions instead of hardcoded POSIX paths - Use raw paths instead of file: URIs in pyarrow test fixtures - Relax Rich box-drawing assertions to check content not formatting - Skip Kerberos tests on Windows (puresasl C lib unavailable) - Relax error message assertion ([Errno 2] vs [WinError 2]) Depends on apache#3721. Related: apache#2477
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Rationale
Prerequisite for #2477. Makes
make testpass on Windows by fixing platform assumptions in test code.Depends on #3721 (IO: Fix Windows drive letters misidentified as URI schemes).
No library code changes all changes are in test files and
conftest.py.Result
Changes
conftest.pyRANDOM_LENGTH = 8(was 20)conftest.py,test_sql.pywarehouse.as_posix()in URI constructiontest_io.py,test_pyarrow.pytest_pyarrow.pyos.path.abspath()instead of hardcoded pathstest_pyarrow.pyfile:{tmpdir}test_pyarrow.pytest_pyarrow.py[WinError 2]vs[Errno 2])test_hive.pytest_hive.pyskipif(sys.platform == 'win32')test_manifest.pyignore_cleanup_errors=TrueAre these changes tested?
Yes full
make testequivalent run locally on Windows: 3803 passed.All changes are backwards-compatible on Linux (assertions use platform-aware values,
skipifonly fires on Windows,as_posix()is a no-op on POSIX).Are there any user-facing changes?
No. Test-only changes.
Related: #2477