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# Copyright (C) 2006, 2009, 2010 Canonical Ltd
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# Copyright (C) 2006, 2009, 2010, 2011 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# do not use bzrlib test cases here - this should be suitable for sending
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from cStringIO import StringIO
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from unittest import TestCase
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from bzrlib import tuned_gzip
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class FakeDecompress(object):
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self.assertEqual('1234567', decompress.unused_data)
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class TestGzip(TestCase):
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class TestGzip(tests.TestCase):
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def test__read_short_remainder(self):
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# a _read call at the end of a compressed hunk should
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# read more bytes if there is less than 8 bytes (the
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# gzip trailer) unread.
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stream = StringIO('\0\0\0\0\0\0\0\0')
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myfile = tuned_gzip.GzipFile(fileobj=stream)
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myfile = self.applyDeprecated(
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symbol_versioning.deprecated_in((2, 3, 0)),
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tuned_gzip.GzipFile, fileobj=stream)
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# disable the _new_member check, we are microtesting.
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myfile._new_member = False
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myfile.crc = zlib.crc32('')
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# all the data should have been read now
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self.assertEqual('', stream.read())
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# and it should be new member time in the stream.
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self.failUnless(myfile._new_member)
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self.assertTrue(myfile._new_member)
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def test_negative_crc(self):
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"""Content with a negative crc should not break when written"""
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gfile = tuned_gzip.GzipFile(mode="w", fileobj=sio)
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gfile = self.applyDeprecated(
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symbol_versioning.deprecated_in((2, 3, 0)),
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tuned_gzip.GzipFile, mode="w", fileobj=sio)
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gfile.write("\xFF")
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self.assertEqual(gfile.crc & 0xFFFFFFFFL, 0xFF000000L)
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self.assertEqual(sio.getvalue()[-8:-4], "\x00\x00\x00\xFF")
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class TestToGzip(TestCase):
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class TestToGzip(tests.TestCase):
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def assertToGzip(self, chunks):
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bytes = ''.join(chunks)
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gzfromchunks = tuned_gzip.chunks_to_gzip(chunks)
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gzfrombytes = tuned_gzip.bytes_to_gzip(bytes)
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self.assertEqual(gzfrombytes, gzfromchunks)
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decoded = tuned_gzip.GzipFile(fileobj=StringIO(gzfromchunks)).read()
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decoded = self.applyDeprecated(
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symbol_versioning.deprecated_in((2, 3, 0)),
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tuned_gzip.GzipFile, fileobj=StringIO(gzfromchunks)).read()
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self.assertEqual(bytes, decoded)
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def test_single_chunk(self):