1 files changed, 155 insertions, 0 deletions
diff --git a/testing/xdelta3-test.py b/testing/xdelta3-test.py
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+#!/usr/bin/python2.7
+# xdelta 3 - delta compression tools and library
+# Copyright (C) 2003, 2006, 2007.  Joshua P. MacDonald
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+import xdelta3
+
+# the test data section is expected to be len('target')
+source = 'source source input0 source source'
+target = 'source source target source source'
+
+#
+#
+
+print 'encode: basic ...'
+result, patch = xdelta3.xd3_encode_memory(target, source, 50)
+
+assert result == 0
+assert len(patch) < len(source)
+
+print 'encode: adler32 ...'
+result, patch_adler32 = xdelta3.xd3_encode_memory(target, source, 50,
+                                                  xdelta3.XD3_ADLER32)
+
+assert result == 0
+assert len(patch_adler32) < len(source)
+assert len(patch_adler32) > len(patch)
+
+print 'encode: secondary ...'
+result, patch_djw = xdelta3.xd3_encode_memory(target, source, 50,
+                                              xdelta3.XD3_SEC_DJW)
+
+assert result == 0
+# secondary compression doesn't help
+assert len(patch_djw) > len(patch)
+
+print 'encode: exact ...'
+result, ignore = xdelta3.xd3_encode_memory(target, source, len(patch))
+
+assert result == 0
+assert len(ignore) < len(source)
+
+print 'encode: out of space ...'
+result, ignore = xdelta3.xd3_encode_memory(target, source, len(patch) - 1)
+
+assert result == 28
+assert ignore == None
+
+print 'encode: zero space ...'
+result, ignore = xdelta3.xd3_encode_memory(target, source, 0)
+
+assert result == 28
+assert ignore == None
+
+print 'encode: no source ...'
+result, zdata = xdelta3.xd3_encode_memory(target, None, 50)
+
+assert result == 0
+assert len(zdata) > len(patch)
+
+print 'encode: no input ...'
+result, ignore = xdelta3.xd3_encode_memory(None, None, 50)
+
+assert result != 0
+
+print 'decode: basic ...'
+result, target1 = xdelta3.xd3_decode_memory(patch, source, len(target))
+
+assert result == 0
+assert len(target1) == len(target)
+assert target1 == target
+
+print 'decode: out of space ...'
+result, ignore = xdelta3.xd3_decode_memory(patch, source, len(target) - 1)
+
+assert result == 28
+assert ignore == None
+
+print 'decode: zero space ...'
+result, ignore = xdelta3.xd3_decode_memory(patch, source, 0)
+
+assert result == 28
+assert ignore == None
+
+print 'decode: single byte error ...'
+# a few expected single-byte errors, e.g., unused address cache bits, see
+# xdelta3-test.h's single-bit error tests
+extra_count = 4
+noverify_count = 0
+for corrupt_pos in range(len(patch_adler32)):
+    input = ''.join([j == corrupt_pos and '\xff' or patch_adler32[j]
+                     for j in range(len(patch_adler32))])
+
+    result, ignore = xdelta3.xd3_decode_memory(input, source, len(target), 0)
+    assert result == -17712
+    assert ignore == None
+
+    # without adler32 verification, the error may be in the data section which
+    # in this case is 6 bytes 'target'
+    result, corrupt = xdelta3.xd3_decode_memory(input, source, len(target),
+                                                xdelta3.XD3_ADLER32_NOVER)
+    if result == 0:
+        noverify_count = noverify_count + 1
+        #print "got %s" % corrupt
+    #end
+#end
+assert noverify_count == len('target') + extra_count
+
+print 'decode: no source ...'
+result, target2 = xdelta3.xd3_decode_memory(zdata, None, len(target))
+
+assert result == 0
+assert target == target2
+
+# Test compression level setting via flags.  assumes a 9 byte checksum
+# and that level 9 steps 2, level 1 steps 15:
+#         01234567890123456789012345678901
+# level 1 only indexes 2 checksums "abcdefghi" and "ABCDEFGHI"
+# outputs 43 vs. 23 bytes
+print 'encode: compression level ...'
+
+source = '_la_la_abcdefghi_la_la_ABCDEFGHI'
+target = 'la_la_ABCDEFGH__la_la_abcdefgh__'
+
+result1, level1 = xdelta3.xd3_encode_memory(target, source, 50, xdelta3.XD3_COMPLEVEL_1)
+result9, level9 = xdelta3.xd3_encode_memory(target, source, 50, xdelta3.XD3_COMPLEVEL_9)
+
+assert result1 == 0 and result9 == 0
+assert len(level1) > len(level9)
+
+#
+# Issue 65
+print 'encode: 65 ...'
+source = 'Hello World' 
+target = 'Hello everyone' 
+result, patch = xdelta3.xd3_encode_memory(target, source, len(target))
+assert result != 0
+
+result, patch = xdelta3.xd3_encode_memory(target, source, 2 * len(target))
+assert result == 0
+
+print 'PASS'