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bpo-27827: identify a greater range of reserved filename on Windows. (GH-26698) (#27422)

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`pathlib.PureWindowsPath.is_reserved()` now identifies as reserved
filenames with trailing spaces or colons.

Co-authored-by: Barney Gale <barney.gale@foundry.com>
Co-authored-by: Eryk Sun <eryksun@gmail.com>
(cherry picked from commit 56c1f6d7ed)
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Miss Islington (bot) 2021-07-28 08:15:51 -07:00 • committed by GitHub
parent 1b82dc1a61
commit debb751f11
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3 changed files with 50 additions and 22 deletions
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38
Lib/test/test_pathlib.py
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@ -1248,19 +1248,35 @@ def test_is_reserved(self):
self.assertIs(False, P('').is_reserved())
self.assertIs(False, P('/').is_reserved())
self.assertIs(False, P('/foo/bar').is_reserved())
self.assertIs(True, P('con').is_reserved())
self.assertIs(True, P('NUL').is_reserved())
self.assertIs(True, P('NUL.txt').is_reserved())
self.assertIs(True, P('com1').is_reserved())
self.assertIs(True, P('com9.bar').is_reserved())
self.assertIs(False, P('bar.com9').is_reserved())
self.assertIs(True, P('lpt1').is_reserved())
self.assertIs(True, P('lpt9.bar').is_reserved())
self.assertIs(False, P('bar.lpt9').is_reserved())
# Only the last component matters.
self.assertIs(False, P('c:/NUL/con/baz').is_reserved())
# UNC paths are never reserved.
self.assertIs(False, P('//my/share/nul/con/aux').is_reserved())
# Case-insenstive DOS-device names are reserved.
self.assertIs(True, P('nul').is_reserved())
self.assertIs(True, P('aux').is_reserved())
self.assertIs(True, P('prn').is_reserved())
self.assertIs(True, P('con').is_reserved())
self.assertIs(True, P('conin$').is_reserved())
self.assertIs(True, P('conout$').is_reserved())
# COM/LPT + 1-9 or + superscript 1-3 are reserved.
self.assertIs(True, P('COM1').is_reserved())
self.assertIs(True, P('LPT9').is_reserved())
self.assertIs(True, P('com\xb9').is_reserved())
self.assertIs(True, P('com\xb2').is_reserved())
self.assertIs(True, P('lpt\xb3').is_reserved())
# DOS-device name mataching ignores characters after a dot or
# a colon and also ignores trailing spaces.
self.assertIs(True, P('NUL.txt').is_reserved())
self.assertIs(True, P('PRN ').is_reserved())
self.assertIs(True, P('AUX .txt').is_reserved())
self.assertIs(True, P('COM1:bar').is_reserved())
self.assertIs(True, P('LPT9 :bar').is_reserved())
# DOS-device names are only matched at the beginning
# of a path component.
self.assertIs(False, P('bar.com9').is_reserved())
self.assertIs(False, P('bar.lpt9').is_reserved())
# Only the last path component matters.
self.assertIs(True, P('c:/baz/con/NUL').is_reserved())
self.assertIs(False, P('c:/NUL/con/baz').is_reserved())
class PurePathTest(_BasePurePathTest, unittest.TestCase):
cls = pathlib.PurePath