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GH-89812: Add pathlib._PathBase (#106337)
Add private `pathlib._PathBase` class. This will be used by an experimental PyPI package to incubate a `tarfile.TarPath` class. Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
This commit is contained in:
Barney Gale
GitHub
parent
0449fe999d
commit
89966a694b
3 changed files with 687 additions and 161 deletions
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@ -1582,14 +1582,172 @@ def test_group(self):
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#
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# Tests for the concrete classes.
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# Tests for the virtual classes.
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#
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class PathTest(unittest.TestCase):
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"""Tests for the FS-accessing functionalities of the Path classes."""
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class PathBaseTest(PurePathTest):
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cls = pathlib._PathBase
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cls = pathlib.Path
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can_symlink = os_helper.can_symlink()
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def test_unsupported_operation(self):
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P = self.cls
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p = self.cls()
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e = pathlib.UnsupportedOperation
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self.assertRaises(e, p.stat)
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self.assertRaises(e, p.lstat)
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self.assertRaises(e, p.exists)
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self.assertRaises(e, p.samefile, 'foo')
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self.assertRaises(e, p.is_dir)
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self.assertRaises(e, p.is_file)
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self.assertRaises(e, p.is_mount)
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self.assertRaises(e, p.is_symlink)
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self.assertRaises(e, p.is_block_device)
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self.assertRaises(e, p.is_char_device)
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self.assertRaises(e, p.is_fifo)
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self.assertRaises(e, p.is_socket)
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self.assertRaises(e, p.open)
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self.assertRaises(e, p.read_bytes)
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self.assertRaises(e, p.read_text)
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self.assertRaises(e, p.write_bytes, b'foo')
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self.assertRaises(e, p.write_text, 'foo')
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self.assertRaises(e, p.iterdir)
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self.assertRaises(e, p.glob, '*')
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self.assertRaises(e, p.rglob, '*')
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self.assertRaises(e, lambda: list(p.walk()))
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self.assertRaises(e, p.absolute)
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self.assertRaises(e, P.cwd)
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self.assertRaises(e, p.expanduser)
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self.assertRaises(e, p.home)
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self.assertRaises(e, p.readlink)
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self.assertRaises(e, p.symlink_to, 'foo')
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self.assertRaises(e, p.hardlink_to, 'foo')
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self.assertRaises(e, p.mkdir)
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self.assertRaises(e, p.touch)
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self.assertRaises(e, p.rename, 'foo')
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self.assertRaises(e, p.replace, 'foo')
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self.assertRaises(e, p.chmod, 0o755)
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self.assertRaises(e, p.lchmod, 0o755)
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self.assertRaises(e, p.unlink)
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self.assertRaises(e, p.rmdir)
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self.assertRaises(e, p.owner)
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self.assertRaises(e, p.group)
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self.assertRaises(e, p.as_uri)
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def test_as_uri_common(self):
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e = pathlib.UnsupportedOperation
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self.assertRaises(e, self.cls().as_uri)
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def test_fspath_common(self):
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self.assertRaises(TypeError, os.fspath, self.cls())
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def test_as_bytes_common(self):
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self.assertRaises(TypeError, bytes, self.cls())
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def test_matches_path_api(self):
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our_names = {name for name in dir(self.cls) if name[0] != '_'}
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path_names = {name for name in dir(pathlib.Path) if name[0] != '_'}
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self.assertEqual(our_names, path_names)
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for attr_name in our_names:
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our_attr = getattr(self.cls, attr_name)
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path_attr = getattr(pathlib.Path, attr_name)
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self.assertEqual(our_attr.__doc__, path_attr.__doc__)
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class DummyPathIO(io.BytesIO):
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"""
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Used by DummyPath to implement `open('w')`
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"""
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def __init__(self, files, path):
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super().__init__()
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self.files = files
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self.path = path
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def close(self):
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self.files[self.path] = self.getvalue()
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super().close()
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class DummyPath(pathlib._PathBase):
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"""
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Simple implementation of PathBase that keeps files and directories in
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memory.
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"""
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_files = {}
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_directories = {}
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_symlinks = {}
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def stat(self, *, follow_symlinks=True):
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if follow_symlinks:
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path = str(self.resolve())
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else:
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path = str(self.parent.resolve() / self.name)
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if path in self._files:
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st_mode = stat.S_IFREG
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elif path in self._directories:
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st_mode = stat.S_IFDIR
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elif path in self._symlinks:
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st_mode = stat.S_IFLNK
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else:
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raise FileNotFoundError(errno.ENOENT, "Not found", str(self))
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return os.stat_result((st_mode, hash(str(self)), 0, 0, 0, 0, 0, 0, 0, 0))
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def open(self, mode='r', buffering=-1, encoding=None,
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errors=None, newline=None):
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if buffering != -1:
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raise NotImplementedError
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path_obj = self.resolve()
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path = str(path_obj)
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name = path_obj.name
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parent = str(path_obj.parent)
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if path in self._directories:
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raise IsADirectoryError(errno.EISDIR, "Is a directory", path)
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text = 'b' not in mode
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mode = ''.join(c for c in mode if c not in 'btU')
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if mode == 'r':
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if path not in self._files:
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raise FileNotFoundError(errno.ENOENT, "File not found", path)
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stream = io.BytesIO(self._files[path])
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elif mode == 'w':
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if parent not in self._directories:
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raise FileNotFoundError(errno.ENOENT, "File not found", parent)
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stream = DummyPathIO(self._files, path)
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self._files[path] = b''
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self._directories[parent].add(name)
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else:
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raise NotImplementedError
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if text:
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stream = io.TextIOWrapper(stream, encoding=encoding, errors=errors, newline=newline)
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return stream
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def iterdir(self):
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path = str(self.resolve())
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if path in self._files:
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raise NotADirectoryError(errno.ENOTDIR, "Not a directory", path)
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elif path in self._directories:
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return (self / name for name in self._directories[path])
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else:
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raise FileNotFoundError(errno.ENOENT, "File not found", path)
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def mkdir(self, mode=0o777, parents=False, exist_ok=False):
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try:
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self._directories[str(self.parent)].add(self.name)
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self._directories[str(self)] = set()
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except KeyError:
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if not parents or self.parent == self:
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raise FileNotFoundError(errno.ENOENT, "File not found", str(self.parent)) from None
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self.parent.mkdir(parents=True, exist_ok=True)
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self.mkdir(mode, parents=False, exist_ok=exist_ok)
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except FileExistsError:
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if not exist_ok:
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raise
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class DummyPathTest(unittest.TestCase):
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"""Tests for PathBase methods that use stat(), open() and iterdir()."""
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cls = DummyPath
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can_symlink = False
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# (BASE)
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# |
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@ -1612,37 +1770,38 @@ class PathTest(unittest.TestCase):
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#
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def setUp(self):
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def cleanup():
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os.chmod(join('dirE'), 0o777)
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os_helper.rmtree(BASE)
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self.addCleanup(cleanup)
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os.mkdir(BASE)
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os.mkdir(join('dirA'))
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os.mkdir(join('dirB'))
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os.mkdir(join('dirC'))
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os.mkdir(join('dirC', 'dirD'))
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os.mkdir(join('dirE'))
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with open(join('fileA'), 'wb') as f:
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f.write(b"this is file A\n")
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with open(join('dirB', 'fileB'), 'wb') as f:
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f.write(b"this is file B\n")
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with open(join('dirC', 'fileC'), 'wb') as f:
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f.write(b"this is file C\n")
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with open(join('dirC', 'novel.txt'), 'wb') as f:
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f.write(b"this is a novel\n")
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with open(join('dirC', 'dirD', 'fileD'), 'wb') as f:
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f.write(b"this is file D\n")
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os.chmod(join('dirE'), 0)
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if self.can_symlink:
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# Relative symlinks.
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os.symlink('fileA', join('linkA'))
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os.symlink('non-existing', join('brokenLink'))
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os.symlink('dirB', join('linkB'), target_is_directory=True)
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os.symlink(os.path.join('..', 'dirB'), join('dirA', 'linkC'), target_is_directory=True)
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# This one goes upwards, creating a loop.
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os.symlink(os.path.join('..', 'dirB'), join('dirB', 'linkD'), target_is_directory=True)
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# Broken symlink (pointing to itself).
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os.symlink('brokenLinkLoop', join('brokenLinkLoop'))
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# note: this must be kept in sync with `PathTest.setUp()`
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cls = self.cls
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cls._files.clear()
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cls._directories.clear()
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cls._symlinks.clear()
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join = cls.pathmod.join
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cls._files.update({
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join(BASE, 'fileA'): b'this is file A\n',
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join(BASE, 'dirB', 'fileB'): b'this is file B\n',
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join(BASE, 'dirC', 'fileC'): b'this is file C\n',
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join(BASE, 'dirC', 'dirD', 'fileD'): b'this is file D\n',
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join(BASE, 'dirC', 'novel.txt'): b'this is a novel\n',
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})
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cls._directories.update({
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BASE: {'dirA', 'dirB', 'dirC', 'dirE', 'fileA'},
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join(BASE, 'dirA'): set(),
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join(BASE, 'dirB'): {'fileB'},
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join(BASE, 'dirC'): {'dirD', 'fileC', 'novel.txt'},
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join(BASE, 'dirC', 'dirD'): {'fileD'},
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join(BASE, 'dirE'): {},
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})
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dirname = BASE
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while True:
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dirname, basename = cls.pathmod.split(dirname)
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if not basename:
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break
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cls._directories[dirname] = {basename}
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def tempdir(self):
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path = self.cls(BASE).with_name('tmp-dirD')
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path.mkdir()
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return path
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def assertFileNotFound(self, func, *args, **kwargs):
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with self.assertRaises(FileNotFoundError) as cm:
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@ -1991,9 +2150,11 @@ def test_rglob_symlink_loop(self):
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def test_glob_many_open_files(self):
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depth = 30
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P = self.cls
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base = P(BASE) / 'deep'
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p = P(base, *(['d']*depth))
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p.mkdir(parents=True)
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p = base = P(BASE) / 'deep'
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p.mkdir()
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for _ in range(depth):
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p /= 'd'
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p.mkdir()
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pattern = '/'.join(['*'] * depth)
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iters = [base.glob(pattern) for j in range(100)]
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for it in iters:
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@ -2080,6 +2241,7 @@ def test_readlink(self):
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self.assertEqual((P / 'brokenLink').readlink(),
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self.cls('non-existing'))
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self.assertEqual((P / 'linkB').readlink(), self.cls('dirB'))
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self.assertEqual((P / 'linkB' / 'linkD').readlink(), self.cls('../dirB'))
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with self.assertRaises(OSError):
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(P / 'fileA').readlink()
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@ -2128,7 +2290,7 @@ def test_resolve_common(self):
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self._check_resolve_relative(p, P(BASE, 'dirB', 'fileB', 'foo', 'in',
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'spam'), False)
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p = P(BASE, 'dirA', 'linkC', '..', 'foo', 'in', 'spam')
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if os.name == 'nt':
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if os.name == 'nt' and isinstance(p, pathlib.Path):
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# In Windows, if linkY points to dirB, 'dirA\linkY\..'
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# resolves to 'dirA' without resolving linkY first.
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self._check_resolve_relative(p, P(BASE, 'dirA', 'foo', 'in',
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@ -2138,9 +2300,7 @@ def test_resolve_common(self):
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# resolves to 'dirB/..' first before resolving to parent of dirB.
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self._check_resolve_relative(p, P(BASE, 'foo', 'in', 'spam'), False)
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# Now create absolute symlinks.
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d = os_helper._longpath(tempfile.mkdtemp(suffix='-dirD',
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dir=os.getcwd()))
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self.addCleanup(os_helper.rmtree, d)
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d = self.tempdir()
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P(BASE, 'dirA', 'linkX').symlink_to(d)
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P(BASE, str(d), 'linkY').symlink_to(join('dirB'))
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p = P(BASE, 'dirA', 'linkX', 'linkY', 'fileB')
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@ -2150,7 +2310,7 @@ def test_resolve_common(self):
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self._check_resolve_relative(p, P(BASE, 'dirB', 'foo', 'in', 'spam'),
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False)
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p = P(BASE, 'dirA', 'linkX', 'linkY', '..', 'foo', 'in', 'spam')
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if os.name == 'nt':
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if os.name == 'nt' and isinstance(p, pathlib.Path):
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# In Windows, if linkY points to dirB, 'dirA\linkY\..'
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# resolves to 'dirA' without resolving linkY first.
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self._check_resolve_relative(p, P(d, 'foo', 'in', 'spam'), False)
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@ -2174,6 +2334,38 @@ def test_resolve_dot(self):
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# Non-strict
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self.assertEqual(r.resolve(strict=False), p / '3' / '4')
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def _check_symlink_loop(self, *args):
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path = self.cls(*args)
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with self.assertRaises(OSError) as cm:
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path.resolve(strict=True)
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self.assertEqual(cm.exception.errno, errno.ELOOP)
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def test_resolve_loop(self):
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if not self.can_symlink:
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self.skipTest("symlinks required")
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if os.name == 'nt' and issubclass(self.cls, pathlib.Path):
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self.skipTest("symlink loops work differently with concrete Windows paths")
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# Loops with relative symlinks.
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self.cls(BASE, 'linkX').symlink_to('linkX/inside')
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self._check_symlink_loop(BASE, 'linkX')
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self.cls(BASE, 'linkY').symlink_to('linkY')
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self._check_symlink_loop(BASE, 'linkY')
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self.cls(BASE, 'linkZ').symlink_to('linkZ/../linkZ')
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self._check_symlink_loop(BASE, 'linkZ')
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# Non-strict
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p = self.cls(BASE, 'linkZ', 'foo')
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self.assertEqual(p.resolve(strict=False), p)
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# Loops with absolute symlinks.
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self.cls(BASE, 'linkU').symlink_to(join('linkU/inside'))
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self._check_symlink_loop(BASE, 'linkU')
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self.cls(BASE, 'linkV').symlink_to(join('linkV'))
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self._check_symlink_loop(BASE, 'linkV')
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self.cls(BASE, 'linkW').symlink_to(join('linkW/../linkW'))
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self._check_symlink_loop(BASE, 'linkW')
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# Non-strict
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q = self.cls(BASE, 'linkW', 'foo')
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self.assertEqual(q.resolve(strict=False), q)
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def test_stat(self):
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statA = self.cls(BASE).joinpath('fileA').stat()
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statB = self.cls(BASE).joinpath('dirB', 'fileB').stat()
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@ -2382,6 +2574,10 @@ def _check_complex_symlinks(self, link0_target):
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self.assertEqualNormCase(str(p), BASE)
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# Resolve relative paths.
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try:
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self.cls().absolute()
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except pathlib.UnsupportedOperation:
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return
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old_path = os.getcwd()
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os.chdir(BASE)
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try:
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@ -2409,6 +2605,92 @@ def test_complex_symlinks_relative(self):
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def test_complex_symlinks_relative_dot_dot(self):
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self._check_complex_symlinks(os.path.join('dirA', '..'))
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class DummyPathWithSymlinks(DummyPath):
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def readlink(self):
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path = str(self.parent.resolve() / self.name)
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if path in self._symlinks:
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return self.with_segments(self._symlinks[path])
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elif path in self._files or path in self._directories:
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raise OSError(errno.EINVAL, "Not a symlink", path)
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else:
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raise FileNotFoundError(errno.ENOENT, "File not found", path)
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def symlink_to(self, target, target_is_directory=False):
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self._directories[str(self.parent)].add(self.name)
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self._symlinks[str(self)] = str(target)
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class DummyPathWithSymlinksTest(DummyPathTest):
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cls = DummyPathWithSymlinks
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can_symlink = True
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def setUp(self):
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super().setUp()
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cls = self.cls
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join = cls.pathmod.join
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cls._symlinks.update({
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join(BASE, 'linkA'): 'fileA',
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join(BASE, 'linkB'): 'dirB',
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join(BASE, 'dirA', 'linkC'): join('..', 'dirB'),
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join(BASE, 'dirB', 'linkD'): join('..', 'dirB'),
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join(BASE, 'brokenLink'): 'non-existing',
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join(BASE, 'brokenLinkLoop'): 'brokenLinkLoop',
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})
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cls._directories[BASE].update({'linkA', 'linkB', 'brokenLink', 'brokenLinkLoop'})
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cls._directories[join(BASE, 'dirA')].add('linkC')
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cls._directories[join(BASE, 'dirB')].add('linkD')
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#
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# Tests for the concrete classes.
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#
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class PathTest(DummyPathTest):
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"""Tests for the FS-accessing functionalities of the Path classes."""
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cls = pathlib.Path
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can_symlink = os_helper.can_symlink()
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def setUp(self):
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# note: this must be kept in sync with `DummyPathTest.setUp()`
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def cleanup():
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os.chmod(join('dirE'), 0o777)
|
||||
os_helper.rmtree(BASE)
|
||||
self.addCleanup(cleanup)
|
||||
os.mkdir(BASE)
|
||||
os.mkdir(join('dirA'))
|
||||
os.mkdir(join('dirB'))
|
||||
os.mkdir(join('dirC'))
|
||||
os.mkdir(join('dirC', 'dirD'))
|
||||
os.mkdir(join('dirE'))
|
||||
with open(join('fileA'), 'wb') as f:
|
||||
f.write(b"this is file A\n")
|
||||
with open(join('dirB', 'fileB'), 'wb') as f:
|
||||
f.write(b"this is file B\n")
|
||||
with open(join('dirC', 'fileC'), 'wb') as f:
|
||||
f.write(b"this is file C\n")
|
||||
with open(join('dirC', 'novel.txt'), 'wb') as f:
|
||||
f.write(b"this is a novel\n")
|
||||
with open(join('dirC', 'dirD', 'fileD'), 'wb') as f:
|
||||
f.write(b"this is file D\n")
|
||||
os.chmod(join('dirE'), 0)
|
||||
if self.can_symlink:
|
||||
# Relative symlinks.
|
||||
os.symlink('fileA', join('linkA'))
|
||||
os.symlink('non-existing', join('brokenLink'))
|
||||
os.symlink('dirB', join('linkB'), target_is_directory=True)
|
||||
os.symlink(os.path.join('..', 'dirB'), join('dirA', 'linkC'), target_is_directory=True)
|
||||
# This one goes upwards, creating a loop.
|
||||
os.symlink(os.path.join('..', 'dirB'), join('dirB', 'linkD'), target_is_directory=True)
|
||||
# Broken symlink (pointing to itself).
|
||||
os.symlink('brokenLinkLoop', join('brokenLinkLoop'))
|
||||
|
||||
def tempdir(self):
|
||||
d = os_helper._longpath(tempfile.mkdtemp(suffix='-dirD',
|
||||
dir=os.getcwd()))
|
||||
self.addCleanup(os_helper.rmtree, d)
|
||||
return d
|
||||
|
||||
def test_concrete_class(self):
|
||||
if self.cls is pathlib.Path:
|
||||
expected = pathlib.WindowsPath if os.name == 'nt' else pathlib.PosixPath
|
||||
|
|
@ -3178,12 +3460,6 @@ def test_absolute(self):
|
|||
self.assertEqual(str(P('//a').absolute()), '//a')
|
||||
self.assertEqual(str(P('//a/b').absolute()), '//a/b')
|
||||
|
||||
def _check_symlink_loop(self, *args):
|
||||
path = self.cls(*args)
|
||||
with self.assertRaises(OSError) as cm:
|
||||
path.resolve(strict=True)
|
||||
self.assertEqual(cm.exception.errno, errno.ELOOP)
|
||||
|
||||
@unittest.skipIf(
|
||||
is_emscripten or is_wasi,
|
||||
"umask is not implemented on Emscripten/WASI."
|
||||
|
|
@ -3230,30 +3506,6 @@ def test_touch_mode(self):
|
|||
st = os.stat(join('masked_new_file'))
|
||||
self.assertEqual(stat.S_IMODE(st.st_mode), 0o750)
|
||||
|
||||
def test_resolve_loop(self):
|
||||
if not self.can_symlink:
|
||||
self.skipTest("symlinks required")
|
||||
# Loops with relative symlinks.
|
||||
os.symlink('linkX/inside', join('linkX'))
|
||||
self._check_symlink_loop(BASE, 'linkX')
|
||||
os.symlink('linkY', join('linkY'))
|
||||
self._check_symlink_loop(BASE, 'linkY')
|
||||
os.symlink('linkZ/../linkZ', join('linkZ'))
|
||||
self._check_symlink_loop(BASE, 'linkZ')
|
||||
# Non-strict
|
||||
p = self.cls(BASE, 'linkZ', 'foo')
|
||||
self.assertEqual(p.resolve(strict=False), p)
|
||||
# Loops with absolute symlinks.
|
||||
os.symlink(join('linkU/inside'), join('linkU'))
|
||||
self._check_symlink_loop(BASE, 'linkU')
|
||||
os.symlink(join('linkV'), join('linkV'))
|
||||
self._check_symlink_loop(BASE, 'linkV')
|
||||
os.symlink(join('linkW/../linkW'), join('linkW'))
|
||||
self._check_symlink_loop(BASE, 'linkW')
|
||||
# Non-strict
|
||||
q = self.cls(BASE, 'linkW', 'foo')
|
||||
self.assertEqual(q.resolve(strict=False), q)
|
||||
|
||||
def test_glob(self):
|
||||
P = self.cls
|
||||
p = P(BASE)
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue