Mercurial > hg
view tests/test-atomictempfile.py @ 35280:8e72f9152c4d
lfs: introduce a user level cache for lfs files
This is the same mechanism in place for largefiles, and solves several problems
working with multiple local repositories. The existing largefiles method is
reused in place, because I suspect that there are other functions that can be
shared. If we wait a bit to identify more before `hg cp lfutil.py ...`, the
history will be easier to trace.
The push between repo14 and repo15 in test-lfs.t arguably shouldn't be uploading
any files with a local push. Maybe we can revisit that when `hg push` without
'lfs.url' can upload files to the push destination. Then it would be consistent
for blobs in a local push to be linked to the local destination's cache.
The cache property is added to run-tests.py, the same as the largefiles
property, so that test generated files don't pollute the real location. Having
files available locally broke a couple existing lfs-test-server tests, so the
cache is cleared in a few places to force file download.
author | Matt Harbison <matt_harbison@yahoo.com> |
---|---|
date | Wed, 06 Dec 2017 22:56:15 -0500 |
parents | 68c43a416585 |
children | 3ec9afb951a0 |
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from __future__ import absolute_import import glob import os import shutil import tempfile import unittest from mercurial import ( util, ) atomictempfile = util.atomictempfile class testatomictempfile(unittest.TestCase): def setUp(self): self._testdir = tempfile.mkdtemp('atomictempfiletest') self._filename = os.path.join(self._testdir, '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, '.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, '.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('.')) # 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('FOO') f.close() # try some times, because reproduction of ambiguity depends on # "filesystem time" for i in xrange(5): atomicwrite(False) oldstat = os.stat(self._filename) if oldstat.st_ctime != oldstat.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 xrange(repetition): atomicwrite(True) newstat = os.stat(self._filename) if oldstat.st_ctime != newstat.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) self.assertTrue(newstat.st_mtime == ((oldstat.st_mtime + repetition) & 0x7fffffff)) # 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='rb') self.assertTrue(file.read(), b'foobar\n') file.discard() def testcontextmanagersuccess(self): """When the context closes, the file is closed""" with atomictempfile('foo') as f: self.assertFalse(os.path.isfile('foo')) f.write(b'argh\n') self.assertTrue(os.path.isfile('foo')) def testcontextmanagerfailure(self): """On exception, the file is discarded""" try: with atomictempfile('foo') as f: self.assertFalse(os.path.isfile('foo')) f.write(b'argh\n') raise ValueError except ValueError: pass self.assertFalse(os.path.isfile('foo')) if __name__ == '__main__': import silenttestrunner silenttestrunner.main(__name__)