mirror of
https://github.com/facebook/sapling.git
synced 2024-12-29 08:02:24 +03:00
d21a108280
Summary: os.stat uses float values, use util.stat instead. (Note: this ignores all push blocking failures!) Reviewed By: singhsrb Differential Revision: D18913982 fbshipit-source-id: 2df5ad0efbba3b18ef90669b4d1910ab39730e18
135 lines
4.2 KiB
Python
135 lines
4.2 KiB
Python
from __future__ import absolute_import
|
|
|
|
import glob
|
|
import os
|
|
import shutil
|
|
import tempfile
|
|
import unittest
|
|
|
|
from edenscm.mercurial import util
|
|
|
|
|
|
atomictempfile = util.atomictempfile
|
|
|
|
# force dealing with tmp filenames that go
|
|
# over the maximum file length
|
|
filename = "A" * 253
|
|
|
|
try:
|
|
xrange(0)
|
|
except NameError:
|
|
xrange = range
|
|
|
|
|
|
class testatomictempfile(unittest.TestCase):
|
|
def setUp(self):
|
|
self._testdir = tempfile.mkdtemp("atomictempfiletest")
|
|
self._filename = os.path.join(self._testdir, filename)
|
|
|
|
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, ".*")))
|
|
|
|
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 = util.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 = util.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__)
|