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import unittest
import random
import subprocess
import os
from commontest import abs_test_dir, os_system
from rdiff_backup import Globals, librsync, rpath
def MakeRandomFile(path, length=None):
"""Writes a random file of given length, or random len if unspecified"""
if not length:
length = random.randrange(5000, 100000)
with open(path, "wb") as fp:
fp.write(os.urandom(length))
class LibrsyncTest(unittest.TestCase):
"""Test various librsync wrapper functions"""
basis = rpath.RPath(Globals.local_connection, os.path.join(abs_test_dir, b"basis"))
new = rpath.RPath(Globals.local_connection, os.path.join(abs_test_dir, b"new"))
new2 = rpath.RPath(Globals.local_connection, os.path.join(abs_test_dir, b"new2"))
sig = rpath.RPath(Globals.local_connection, os.path.join(abs_test_dir, b"signature"))
sig2 = rpath.RPath(Globals.local_connection, os.path.join(abs_test_dir, b"signature2"))
delta = rpath.RPath(Globals.local_connection, os.path.join(abs_test_dir, b"delta"))
def sig_file_test_helper(self, blocksize, iterations, file_len=None):
"""Compare SigFile output to rdiff output at given blocksize"""
for i in range(iterations):
MakeRandomFile(self.basis.path, file_len)
self._clean_file(self.sig)
rdiff_help_text = subprocess.check_output(["rdiff", "--help"])
if b'-R' in rdiff_help_text:
self.assertEqual(os_system(
b"rdiff -b %i -R rollsum -S 8 -H md4 signature %b %b" %
(blocksize, self.basis.path, self.sig.path)), 0)
elif b'-H' in rdiff_help_text:
self.assertEqual(os_system(
b"rdiff -b %i -H md4 signature %b %b" %
(blocksize, self.basis.path, self.sig.path)), 0)
else:
self.assertEqual(os_system(
b"rdiff -b %i signature %b %b" %
(blocksize, self.basis.path, self.sig.path)), 0)
with self.sig.open("rb") as fp:
rdiff_sig = fp.read()
sf = librsync.SigFile(self.basis.open("rb"), blocksize)
librsync_sig = sf.read()
sf.close()
self.assertEqual(rdiff_sig, librsync_sig)
def _clean_file(self, rp):
"""Make sure the given rpath is properly cleaned"""
rp.setdata()
if rp.lstat():
rp.delete()
def testSigFile(self):
"""Make sure SigFile generates same data as rdiff, blocksize 512"""
self.sig_file_test_helper(512, 5)
def testSigFile2(self):
"""Test SigFile like above, but try various blocksize"""
self.sig_file_test_helper(2048, 1, 60000)
self.sig_file_test_helper(7168, 1, 6000)
self.sig_file_test_helper(204800, 1, 40 * 1024 * 1024)
def testSigGenerator(self):
"""Test SigGenerator, make sure it's same as SigFile"""
for i in range(5):
MakeRandomFile(self.basis.path)
sf = librsync.SigFile(self.basis.open("rb"))
sigfile_string = sf.read()
sf.close()
sig_gen = librsync.SigGenerator()
with self.basis.open("rb") as infile:
while 1:
buf = infile.read(1000)
if not buf:
break
sig_gen.update(buf)
siggen_string = sig_gen.get_sig()
self.assertEqual(sigfile_string, siggen_string)
def OldtestDelta(self):
"""Test delta generation against Rdiff"""
MakeRandomFile(self.basis.path)
self.assertEqual(os_system(
b"rdiff signature %s %s" % (self.basis.path, self.sig.path)), 0)
for i in range(5):
MakeRandomFile(self.new.path)
self.assertEqual(os_system(
b"rdiff delta %b %b %b" %
(self.sig.path, self.new.path, self.delta.path)), 0)
fp = self.delta.open("rb")
rdiff_delta = fp.read()
fp.close()
df = librsync.DeltaFile(self.sig.open("rb"), self.new.open("rb"))
librsync_delta = df.read()
df.close()
print(len(rdiff_delta), len(librsync_delta))
print(repr(rdiff_delta[:100]))
print(repr(librsync_delta[:100]))
self.assertEqual(rdiff_delta, librsync_delta)
def testDelta(self):
"""Test delta generation by making sure rdiff can process output
There appears to be some indeterminism so we can't just
byte-compare the deltas produced by rdiff and DeltaFile.
"""
MakeRandomFile(self.basis.path)
self._clean_file(self.sig)
self.assertEqual(os_system(
b"rdiff signature %s %s" % (self.basis.path, self.sig.path)), 0)
for i in range(5):
MakeRandomFile(self.new.path)
df = librsync.DeltaFile(self.sig.open("rb"), self.new.open("rb"))
librsync_delta = df.read()
df.close()
fp = self.delta.open("wb")
fp.write(librsync_delta)
fp.close()
self._clean_file(self.new2)
self.assertEqual(os_system(
b"rdiff patch %s %s %s" %
(self.basis.path, self.delta.path, self.new2.path)), 0)
new_fp = self.new.open("rb")
new = new_fp.read()
new_fp.close()
new2_fp = self.new2.open("rb")
new2 = new2_fp.read()
new2_fp.close()
self.assertEqual(new, new2)
def testPatch(self):
"""Test patching against Rdiff"""
MakeRandomFile(self.basis.path)
self._clean_file(self.sig)
self.assertEqual(os_system(
b"rdiff signature %s %s" % (self.basis.path, self.sig.path)), 0)
for i in range(5):
MakeRandomFile(self.new.path)
self._clean_file(self.delta)
self.assertEqual(os_system(
b"rdiff delta %s %s %s" %
(self.sig.path, self.new.path, self.delta.path)), 0)
fp = self.new.open("rb")
real_new = fp.read()
fp.close()
pf = librsync.PatchedFile(self.basis.open("rb"),
self.delta.open("rb"))
librsync_new = pf.read()
pf.close()
self.assertEqual(real_new, librsync_new)
if __name__ == "__main__":
unittest.main()
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