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pathlib ABCs: tighten up resolve() and absolute() (#126611)

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In `PathBase.resolve()`, raise `UnsupportedOperation` if a non-POSIX path
parser is used (our implementation uses `posixpath._realpath()`, which
produces incorrect results for non-POSIX path flavours.) Also tweak code to
call `self.absolute()` upfront rather than supplying an emulated `getcwd()`
function.

Adjust `PathBase.absolute()` to work somewhat like `resolve()`. If a POSIX
path parser is used, we treat the root directory as the current directory.
This is the simplest useful behaviour for concrete path types without a
current directory cursor.
This commit is contained in:
Barney Gale 2024-11-09 18:47:49 +00:00 • committed by GitHub
parent 0f47a3199c
commit 266328552e
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3 changed files with 53 additions and 32 deletions
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22
Lib/test/test_pathlib/test_pathlib.py
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@ -861,6 +861,28 @@ class PathTest(test_pathlib_abc.DummyPathTest, PurePathTest):
def test_move_into_empty_name_other_os(self):
self.test_move_into_empty_name()
def _check_complex_symlinks(self, link0_target):
super()._check_complex_symlinks(link0_target)
P = self.cls(self.base)
# Resolve relative paths.
old_path = os.getcwd()
os.chdir(self.base)
try:
p = self.cls('link0').resolve()
self.assertEqual(p, P)
self.assertEqualNormCase(str(p), self.base)
p = self.cls('link1').resolve()
self.assertEqual(p, P)
self.assertEqualNormCase(str(p), self.base)
p = self.cls('link2').resolve()
self.assertEqual(p, P)
self.assertEqualNormCase(str(p), self.base)
p = self.cls('link3').resolve()
self.assertEqual(p, P)
self.assertEqualNormCase(str(p), self.base)
finally:
os.chdir(old_path)
def test_resolve_nonexist_relative_issue38671(self):
p = self.cls('non', 'exist')