Mercurial > hg
view tests/test-filecache.py @ 44209:ae4d729eb3c8
tests: add test showing crash when shelving ghosted rename target
When you `hg rename` a file and then delete the rename target, `hg
shelve` will give you a traceback.
Note that the shelve succeeds and the shelve is correct, it's just the
update to the parent that fails (i.e. to the parent of the commit that
was created for the shelve).
This can be squashed into the next commit if the reviewer prefers.
Differential Revision: https://phab.mercurial-scm.org/D8045
author | Martin von Zweigbergk <martinvonz@google.com> |
---|---|
date | Wed, 29 Jan 2020 23:05:02 -0800 |
parents | 2372284d9457 |
children | e01ea8325859 |
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from __future__ import absolute_import, print_function import os import stat import subprocess import sys if subprocess.call( ['python', '%s/hghave' % os.environ['TESTDIR'], 'cacheable'] ): sys.exit(80) print_ = print def print(*args, **kwargs): """print() wrapper that flushes stdout buffers to avoid py3 buffer issues We could also just write directly to sys.stdout.buffer the way the ui object will, but this was easier for porting the test. """ print_(*args, **kwargs) sys.stdout.flush() from mercurial import ( extensions, hg, localrepo, pycompat, ui as uimod, util, vfs as vfsmod, ) if pycompat.ispy3: xrange = range class fakerepo(object): def __init__(self): self._filecache = {} class fakevfs(object): def join(self, p): return p vfs = fakevfs() def unfiltered(self): return self def sjoin(self, p): return p @localrepo.repofilecache('x', 'y') def cached(self): print('creating') return 'string from function' def invalidate(self): for k in self._filecache: try: delattr(self, pycompat.sysstr(k)) except AttributeError: pass def basic(repo): print("* neither file exists") # calls function repo.cached repo.invalidate() print("* neither file still exists") # uses cache repo.cached # create empty file f = open('x', 'w') f.close() repo.invalidate() print("* empty file x created") # should recreate the object repo.cached f = open('x', 'w') f.write('a') f.close() repo.invalidate() print("* file x changed size") # should recreate the object repo.cached repo.invalidate() print("* nothing changed with either file") # stats file again, reuses object repo.cached # atomic replace file, size doesn't change # hopefully st_mtime doesn't change as well so this doesn't use the cache # because of inode change f = vfsmod.vfs(b'.')(b'x', b'w', atomictemp=True) f.write(b'b') f.close() repo.invalidate() print("* file x changed inode") repo.cached # create empty file y f = open('y', 'w') f.close() repo.invalidate() print("* empty file y created") # should recreate the object repo.cached f = open('y', 'w') f.write('A') f.close() repo.invalidate() print("* file y changed size") # should recreate the object repo.cached f = vfsmod.vfs(b'.')(b'y', b'w', atomictemp=True) f.write(b'B') f.close() repo.invalidate() print("* file y changed inode") repo.cached f = vfsmod.vfs(b'.')(b'x', b'w', atomictemp=True) f.write(b'c') f.close() f = vfsmod.vfs(b'.')(b'y', b'w', atomictemp=True) f.write(b'C') f.close() repo.invalidate() print("* both files changed inode") repo.cached def fakeuncacheable(): def wrapcacheable(orig, *args, **kwargs): return False def wrapinit(orig, *args, **kwargs): pass originit = extensions.wrapfunction(util.cachestat, '__init__', wrapinit) origcacheable = extensions.wrapfunction( util.cachestat, 'cacheable', wrapcacheable ) for fn in ['x', 'y']: try: os.remove(fn) except OSError: pass basic(fakerepo()) util.cachestat.cacheable = origcacheable util.cachestat.__init__ = originit def test_filecache_synced(): # test old behavior that caused filecached properties to go out of sync os.system('hg init && echo a >> a && hg ci -qAm.') repo = hg.repository(uimod.ui.load()) # first rollback clears the filecache, but changelog to stays in __dict__ repo.rollback() repo.commit(b'.') # second rollback comes along and touches the changelog externally # (file is moved) repo.rollback() # but since changelog isn't under the filecache control anymore, we don't # see that it changed, and return the old changelog without reconstructing # it repo.commit(b'.') def setbeforeget(repo): os.remove('x') os.remove('y') repo.__class__.cached.set(repo, 'string set externally') repo.invalidate() print("* neither file exists") print(repo.cached) repo.invalidate() f = open('x', 'w') f.write('a') f.close() print("* file x created") print(repo.cached) repo.__class__.cached.set(repo, 'string 2 set externally') repo.invalidate() print("* string set externally again") print(repo.cached) repo.invalidate() f = open('y', 'w') f.write('b') f.close() print("* file y created") print(repo.cached) def antiambiguity(): filename = 'ambigcheck' # try some times, because reproduction of ambiguity depends on # "filesystem time" for i in xrange(5): fp = open(filename, 'w') fp.write('FOO') fp.close() oldstat = os.stat(filename) if oldstat[stat.ST_CTIME] != oldstat[stat.ST_MTIME]: # subsequent changing never causes ambiguity continue repetition = 3 # repeat changing via checkambigatclosing, to examine whether # st_mtime is advanced multiple times as expected for i in xrange(repetition): # explicit closing fp = vfsmod.checkambigatclosing(open(filename, 'a')) fp.write('FOO') fp.close() # implicit closing by "with" statement with vfsmod.checkambigatclosing(open(filename, 'a')) as fp: fp.write('BAR') newstat = os.stat(filename) if oldstat[stat.ST_CTIME] != newstat[stat.ST_CTIME]: # timestamp ambiguity was naturally avoided while repetition continue # st_mtime should be advanced "repetition * 2" times, because # all changes occurred at same time (in sec) expected = (oldstat[stat.ST_MTIME] + repetition * 2) & 0x7FFFFFFF if newstat[stat.ST_MTIME] != expected: print( "'newstat[stat.ST_MTIME] %s is not %s (as %s + %s * 2)" % ( newstat[stat.ST_MTIME], expected, oldstat[stat.ST_MTIME], repetition, ) ) # no more examination is needed regardless of result 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 print('basic:') print() basic(fakerepo()) print() print('fakeuncacheable:') print() fakeuncacheable() test_filecache_synced() print() print('setbeforeget:') print() setbeforeget(fakerepo()) print() print('antiambiguity:') print() antiambiguity()