New tests for librsync wrapper.

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@152 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

trunk/rdiff-backup/testing/librsynctest.py

+import unittest, random
+from commontest import *
+import librsync
+
+def MakeRandomFile(path):
+	"""Writes a random file of length between 10000 and 100000"""
+	fp = open(path, "w")
+	randseq = []
+	for i in xrange(random.randrange(5000, 30000)):
+		randseq.append(chr(random.randrange(256)))
+	fp.write("".join(randseq))
+	fp.close()
+
+
+class LibrsyncTest(unittest.TestCase):
+	"""Test various librsync wrapper functions"""
+	basis = RPath(Globals.local_connection, "testfiles/basis")
+	new = RPath(Globals.local_connection, "testfiles/new")
+	new2 = RPath(Globals.local_connection, "testfiles/new2")
+	sig = RPath(Globals.local_connection, "testfiles/signature")
+	delta = RPath(Globals.local_connection, "testfiles/delta")
+	def testSigFile(self):
+		"""Make sure SigFile generates same data as rdiff"""
+		for i in range(5):
+			MakeRandomFile(self.basis.path)
+			self.sig.delete()
+			assert not os.system("rdiff signature %s %s" %
+								 (self.basis.path, self.sig.path))
+			fp = self.sig.open("rb")
+			rdiff_sig = fp.read()
+			fp.close()
+
+			sf = librsync.SigFile(self.basis.open("rb"))
+			librsync_sig = sf.read()
+			sf.close()
+
+			assert rdiff_sig == librsync_sig, \
+				   (len(rdiff_sig), len(librsync_sig))
+
+	def OldtestDelta(self):
+		"""Test delta generation against Rdiff"""
+		MakeRandomFile(self.basis.path)
+		assert not os.system("rdiff signature %s %s" %
+							 (self.basis.path, self.sig.path))
+		for i in range(5):
+			MakeRandomFile(self.new.path)
+			assert not os.system("rdiff delta %s %s %s" %
+						  (self.sig.path, self.new.path, self.delta.path))
+			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])
+			assert rdiff_delta == librsync_delta
+
+	def testDelta(self):
+		"""Test delta generation by making sure rdiff can process output
+
+		There appears to be some undeterminism so we can't just
+		byte-compare the deltas produced by rdiff and DeltaFile.
+
+		"""
+		MakeRandomFile(self.basis.path)
+		assert not os.system("rdiff signature %s %s" %
+							 (self.basis.path, self.sig.path))
+		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()
+
+			assert not os.system("rdiff patch %s %s %s" %
+								 (self.basis.path, self.delta.path,
+								  self.new2.path))
+			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()
+
+			assert new == new2, (len(new), len(new2))
+
+	def testPatch(self):
+		"""Test patching against Rdiff"""
+		MakeRandomFile(self.basis.path)
+		assert not os.system("rdiff signature %s %s" %
+							 (self.basis.path, self.sig.path))
+		for i in range(5):
+			MakeRandomFile(self.new.path)
+			assert not os.system("rdiff delta %s %s %s" %
+						  (self.sig.path, self.new.path, self.delta.path))
+			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()
+
+			assert real_new == librsync_new, \
+				   (len(real_new), len(librsync_new))
+			
+
+
+if __name__ == "__main__": unittest.main()
+