Mercurial > hg
view tests/test-atomictempfile.py @ 49603:3eda36e9b3d6 stable
matcher: fix issues regex flag contained in pattern (issue6759)
Python 3.11 is now enforcing that flag must be at the beginning of the regex
This creates a serious regression for people using Python 3.11 with an hgignore
using flag in a "relre" pattern.
We now detect any flags in such pattern and "prepend" our ".*" pattern after them.
In addition, we now insert the flag in the regexp to only affect the pattern we
are rewriting. Otherwise, the regex built from the combined pattern would these
flags in the middle of it anyway.
As a side effect of this last change, we fix a bug… before this change regex
flag in a pattern would affect all combined patterns. That was bad and is not
longer the case.
The Rust code needs to be updated to fix that very bug, but we will do it in
another changeset.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 16 Nov 2022 13:05:01 +0100 |
parents | 56f98406831b |
children |
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import glob import os import shutil import stat import tempfile import unittest from mercurial import ( util, ) atomictempfile = util.atomictempfile class testatomictempfile(unittest.TestCase): def setUp(self): self._testdir = tempfile.mkdtemp(b'atomictempfiletest') self._filename = os.path.join(self._testdir, b'testfilename') def tearDown(self): shutil.rmtree(self._testdir, True) def testsimple(self): file = atomictempfile(self._filename) self.assertFalse(os.path.isfile(self._filename)) tempfilename = file._tempname self.assertTrue( tempfilename in glob.glob(os.path.join(self._testdir, b'.testfilename-*')) ) file.write(b'argh\n') file.close() self.assertTrue(os.path.isfile(self._filename)) self.assertTrue( tempfilename not in glob.glob(os.path.join(self._testdir, b'.testfilename-*')) ) # discard() removes the temp file without making the write permanent def testdiscard(self): file = atomictempfile(self._filename) (dir, basename) = os.path.split(file._tempname) file.write(b'yo\n') file.discard() self.assertFalse(os.path.isfile(self._filename)) self.assertTrue(basename not in os.listdir(b'.')) # if a programmer screws up and passes bad args to atomictempfile, they # get a plain ordinary TypeError, not infinite recursion def testoops(self): with self.assertRaises(TypeError): atomictempfile() # checkambig=True avoids ambiguity of timestamp def testcheckambig(self): def atomicwrite(checkambig): f = atomictempfile(self._filename, checkambig=checkambig) f.write(b'FOO') f.close() # try some times, because reproduction of ambiguity depends on # "filesystem time" for i in range(5): atomicwrite(False) oldstat = os.stat(self._filename) if oldstat[stat.ST_CTIME] != oldstat[stat.ST_MTIME]: # subsequent changing never causes ambiguity continue repetition = 3 # repeat atomic write with checkambig=True, to examine # whether st_mtime is advanced multiple times as expected for j in range(repetition): atomicwrite(True) newstat = os.stat(self._filename) if oldstat[stat.ST_CTIME] != newstat[stat.ST_CTIME]: # timestamp ambiguity was naturally avoided while repetition continue # st_mtime should be advanced "repetition" times, because # all atomicwrite() occurred at same time (in sec) oldtime = (oldstat[stat.ST_MTIME] + repetition) & 0x7FFFFFFF self.assertTrue(newstat[stat.ST_MTIME] == oldtime) # no more examination is needed, if assumption above is true break else: # This platform seems too slow to examine anti-ambiguity # of file timestamp (or test happened to be executed at # bad timing). Exit silently in this case, because running # on other faster platforms can detect problems pass def testread(self): with open(self._filename, 'wb') as f: f.write(b'foobar\n') file = atomictempfile(self._filename, mode=b'rb') self.assertTrue(file.read(), b'foobar\n') file.discard() def testcontextmanagersuccess(self): """When the context closes, the file is closed""" with atomictempfile(b'foo') as f: self.assertFalse(os.path.isfile(b'foo')) f.write(b'argh\n') self.assertTrue(os.path.isfile(b'foo')) def testcontextmanagerfailure(self): """On exception, the file is discarded""" try: with atomictempfile(b'foo') as f: self.assertFalse(os.path.isfile(b'foo')) f.write(b'argh\n') raise ValueError except ValueError: pass self.assertFalse(os.path.isfile(b'foo')) if __name__ == '__main__': import silenttestrunner silenttestrunner.main(__name__)