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breezy/tests/test_tuned_gzip.py

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# Copyright (C) 2006, 2009, 2010, 2011 Canonical Ltd

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#

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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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# the Free Software Foundation; either version 2 of the License, or

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# (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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# GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License

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# along with this program; if not, write to the Free Software

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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

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"""Tests for tuned_gzip."""

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import gzip

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from io import BytesIO

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from .. import (

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    tuned_gzip,

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    tests,

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    )

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class TestToGzip(tests.TestCase):

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    def assertToGzip(self, chunks):

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        raw_bytes = b''.join(chunks)

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        gzfromchunks = tuned_gzip.chunks_to_gzip(chunks)

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        decoded = gzip.GzipFile(fileobj=BytesIO(b''.join(gzfromchunks))).read()

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        lraw, ldecoded = len(raw_bytes), len(decoded)

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        self.assertEqual(lraw, ldecoded,

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                         'Expecting data length %d, got %d' % (lraw, ldecoded))

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        self.assertEqual(raw_bytes, decoded)

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    def test_single_chunk(self):

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        self.assertToGzip([b'a modest chunk\nwith some various\nbits\n'])

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    def test_simple_text(self):

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        self.assertToGzip([b'some\n', b'strings\n', b'to\n', b'process\n'])

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    def test_large_chunks(self):

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        self.assertToGzip([b'a large string\n' * 1024])

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        self.assertToGzip([b'a large string\n'] * 1024)

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    def test_enormous_chunks(self):

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        self.assertToGzip([b'a large string\n' * 1024 * 256])

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        self.assertToGzip([b'a large string\n'] * 1024 * 256)

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