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Issue #19918: Fix PurePath.relative_to() under Windows.

This commit is contained in:
Antoine Pitrou 2013-12-28 19:49:04 +01:00
parent 68816ef058
commit 156b3610b8
3 changed files with 67 additions and 40 deletions
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12
Lib/pathlib.py
View File

@ -780,27 +780,23 @@ class PurePath(object):
parts = self._parts
drv = self._drv
root = self._root
if drv or root:
if root:
abs_parts = [drv, root] + parts[1:]
else:
abs_parts = [drv] + parts[1:]
else:
abs_parts = parts
to_drv, to_root, to_parts = self._parse_args(other)
if to_drv or to_root:
if to_root:
to_abs_parts = [to_drv, to_root] + to_parts[1:]
else:
to_abs_parts = [to_drv] + to_parts[1:]
else:
to_abs_parts = to_parts
n = len(to_abs_parts)
if n == 0 and (drv or root) or abs_parts[:n] != to_abs_parts:
cf = self._flavour.casefold_parts
if (root or drv) if n == 0 else cf(abs_parts[:n]) != cf(to_abs_parts):
formatted = self._format_parsed_parts(to_drv, to_root, to_parts)
raise ValueError("{!r} does not start with {!r}"
.format(str(self), str(formatted)))
return self._from_parsed_parts('', '', abs_parts[n:])
return self._from_parsed_parts('', root if n == 1 else '',
abs_parts[n:])
@property
def parts(self):

85
Lib/test/test_pathlib.py
View File

@ -536,9 +536,14 @@ class _BasePurePathTest(object):
P = self.cls
p = P('a/b')
self.assertRaises(TypeError, p.relative_to)
self.assertRaises(TypeError, p.relative_to, b'a')
self.assertEqual(p.relative_to(P()), P('a/b'))
self.assertEqual(p.relative_to(''), P('a/b'))
self.assertEqual(p.relative_to(P('a')), P('b'))
self.assertEqual(p.relative_to('a'), P('b'))
self.assertEqual(p.relative_to('a/'), P('b'))
self.assertEqual(p.relative_to(P('a/b')), P())
self.assertEqual(p.relative_to('a/b'), P())
# With several args
self.assertEqual(p.relative_to('a', 'b'), P())
# Unrelated paths
@ -548,13 +553,18 @@ class _BasePurePathTest(object):
self.assertRaises(ValueError, p.relative_to, P('/a'))
p = P('/a/b')
self.assertEqual(p.relative_to(P('/')), P('a/b'))
self.assertEqual(p.relative_to('/'), P('a/b'))
self.assertEqual(p.relative_to(P('/a')), P('b'))
self.assertEqual(p.relative_to('/a'), P('b'))
self.assertEqual(p.relative_to('/a/'), P('b'))
self.assertEqual(p.relative_to(P('/a/b')), P())
self.assertEqual(p.relative_to('/a/b'), P())
# Unrelated paths
self.assertRaises(ValueError, p.relative_to, P('/c'))
self.assertRaises(ValueError, p.relative_to, P('/a/b/c'))
self.assertRaises(ValueError, p.relative_to, P('/a/c'))
self.assertRaises(ValueError, p.relative_to, P())
self.assertRaises(ValueError, p.relative_to, '')
self.assertRaises(ValueError, p.relative_to, P('a'))
def test_pickling_common(self):
@ -917,42 +927,61 @@ class PureWindowsPathTest(_BasePurePathTest, unittest.TestCase):
def test_relative_to(self):
P = self.cls
p = P('c:a/b')
self.assertEqual(p.relative_to(P('c:')), P('a/b'))
self.assertEqual(p.relative_to(P('c:a')), P('b'))
self.assertEqual(p.relative_to(P('c:a/b')), P())
p = P('C:Foo/Bar')
self.assertEqual(p.relative_to(P('c:')), P('Foo/Bar'))
self.assertEqual(p.relative_to('c:'), P('Foo/Bar'))
self.assertEqual(p.relative_to(P('c:foO')), P('Bar'))
self.assertEqual(p.relative_to('c:foO'), P('Bar'))
self.assertEqual(p.relative_to('c:foO/'), P('Bar'))
self.assertEqual(p.relative_to(P('c:foO/baR')), P())
self.assertEqual(p.relative_to('c:foO/baR'), P())
# Unrelated paths
self.assertRaises(ValueError, p.relative_to, P())
self.assertRaises(ValueError, p.relative_to, '')
self.assertRaises(ValueError, p.relative_to, P('d:'))
self.assertRaises(ValueError, p.relative_to, P('a'))
self.assertRaises(ValueError, p.relative_to, P('/a'))
self.assertRaises(ValueError, p.relative_to, P('c:a/b/c'))
self.assertRaises(ValueError, p.relative_to, P('c:a/c'))
self.assertRaises(ValueError, p.relative_to, P('c:/a'))
p = P('c:/a/b')
self.assertEqual(p.relative_to(P('c:')), P('/a/b'))
self.assertEqual(p.relative_to(P('c:/')), P('a/b'))
self.assertEqual(p.relative_to(P('c:/a')), P('b'))
self.assertEqual(p.relative_to(P('c:/a/b')), P())
self.assertRaises(ValueError, p.relative_to, P('/'))
self.assertRaises(ValueError, p.relative_to, P('Foo'))
self.assertRaises(ValueError, p.relative_to, P('/Foo'))
self.assertRaises(ValueError, p.relative_to, P('C:/Foo'))
self.assertRaises(ValueError, p.relative_to, P('C:Foo/Bar/Baz'))
self.assertRaises(ValueError, p.relative_to, P('C:Foo/Baz'))
p = P('C:/Foo/Bar')
self.assertEqual(p.relative_to(P('c:')), P('/Foo/Bar'))
self.assertEqual(p.relative_to('c:'), P('/Foo/Bar'))
self.assertEqual(str(p.relative_to(P('c:'))), '\\Foo\\Bar')
self.assertEqual(str(p.relative_to('c:')), '\\Foo\\Bar')
self.assertEqual(p.relative_to(P('c:/')), P('Foo/Bar'))
self.assertEqual(p.relative_to('c:/'), P('Foo/Bar'))
self.assertEqual(p.relative_to(P('c:/foO')), P('Bar'))
self.assertEqual(p.relative_to('c:/foO'), P('Bar'))
self.assertEqual(p.relative_to('c:/foO/'), P('Bar'))
self.assertEqual(p.relative_to(P('c:/foO/baR')), P())
self.assertEqual(p.relative_to('c:/foO/baR'), P())
# Unrelated paths
self.assertRaises(ValueError, p.relative_to, P('c:/c'))
self.assertRaises(ValueError, p.relative_to, P('c:/a/b/c'))
self.assertRaises(ValueError, p.relative_to, P('c:/a/c'))
self.assertRaises(ValueError, p.relative_to, P('c:a'))
self.assertRaises(ValueError, p.relative_to, P('C:/Baz'))
self.assertRaises(ValueError, p.relative_to, P('C:/Foo/Bar/Baz'))
self.assertRaises(ValueError, p.relative_to, P('C:/Foo/Baz'))
self.assertRaises(ValueError, p.relative_to, P('C:Foo'))
self.assertRaises(ValueError, p.relative_to, P('d:'))
self.assertRaises(ValueError, p.relative_to, P('d:/'))
self.assertRaises(ValueError, p.relative_to, P('/a'))
self.assertRaises(ValueError, p.relative_to, P('//c/a'))
self.assertRaises(ValueError, p.relative_to, P('/'))
self.assertRaises(ValueError, p.relative_to, P('/Foo'))
self.assertRaises(ValueError, p.relative_to, P('//C/Foo'))
# UNC paths
p = P('//a/b/c/d')
self.assertEqual(p.relative_to(P('//a/b')), P('c/d'))
self.assertEqual(p.relative_to(P('//a/b/c')), P('d'))
self.assertEqual(p.relative_to(P('//a/b/c/d')), P())
p = P('//Server/Share/Foo/Bar')
self.assertEqual(p.relative_to(P('//sErver/sHare')), P('Foo/Bar'))
self.assertEqual(p.relative_to('//sErver/sHare'), P('Foo/Bar'))
self.assertEqual(p.relative_to('//sErver/sHare/'), P('Foo/Bar'))
self.assertEqual(p.relative_to(P('//sErver/sHare/Foo')), P('Bar'))
self.assertEqual(p.relative_to('//sErver/sHare/Foo'), P('Bar'))
self.assertEqual(p.relative_to('//sErver/sHare/Foo/'), P('Bar'))
self.assertEqual(p.relative_to(P('//sErver/sHare/Foo/Bar')), P())
self.assertEqual(p.relative_to('//sErver/sHare/Foo/Bar'), P())
# Unrelated paths
self.assertRaises(ValueError, p.relative_to, P('/a/b/c'))
self.assertRaises(ValueError, p.relative_to, P('c:/a/b/c'))
self.assertRaises(ValueError, p.relative_to, P('//z/b/c'))
self.assertRaises(ValueError, p.relative_to, P('//a/z/c'))
self.assertRaises(ValueError, p.relative_to, P('/Server/Share/Foo'))
self.assertRaises(ValueError, p.relative_to, P('c:/Server/Share/Foo'))
self.assertRaises(ValueError, p.relative_to, P('//z/Share/Foo'))
self.assertRaises(ValueError, p.relative_to, P('//Server/z/Foo'))
def test_is_absolute(self):
P = self.cls

2
Misc/NEWS
View File

@ -44,6 +44,8 @@ Core and Builtins
Library
-------
- Issue #19918: Fix PurePath.relative_to() under Windows.
- Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl
module, rather than silently let them emit clear text data.