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bzrlib/tests/test_knit.py
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# Copyright (C) 2005, 2006, 2007 Canonical Ltd
 
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# Copyright (C) 2006-2010 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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"""Tests for Knit data structure"""
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from cStringIO import StringIO
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import difflib
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import gzip
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import sys
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from bzrlib import (
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    errors,
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    generate_ids,
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    knit,
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    multiparent,
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    osutils,
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    pack,
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    tests,
 
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    transport,
 
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    tuned_gzip,
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    )
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from bzrlib.errors import (
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    RevisionAlreadyPresent,
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    KnitHeaderError,
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    RevisionNotPresent,
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    NoSuchFile,
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    )
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from bzrlib.index import *
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from bzrlib.knit import (
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    AnnotatedKnitContent,
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    KnitContent,
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    KnitSequenceMatcher,
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    KnitVersionedFiles,
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    PlainKnitContent,
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    _VFContentMapGenerator,
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    _KnitKeyAccess,
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    make_file_factory,
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    )
 
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from bzrlib.patiencediff import PatienceSequenceMatcher
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from bzrlib.repofmt import pack_repo
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from bzrlib.tests import (
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    Feature,
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    KnownFailure,
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    TestCase,
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    TestCaseWithMemoryTransport,
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    TestCaseWithTransport,
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    TestNotApplicable,
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    )
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from bzrlib.transport import get_transport
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from bzrlib.transport.memory import MemoryTransport
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from bzrlib.tuned_gzip import GzipFile
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from bzrlib.versionedfile import (
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    AbsentContentFactory,
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    ConstantMapper,
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        line_delta = source_content.line_delta(target_content)
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        delta_blocks = list(KnitContent.get_line_delta_blocks(line_delta,
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            source_lines, target_lines))
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        matcher = KnitSequenceMatcher(None, source_lines, target_lines)
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        matcher_blocks = list(list(matcher.get_matching_blocks()))
 
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        matcher = PatienceSequenceMatcher(None, source_lines, target_lines)
 
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        matcher_blocks = list(matcher.get_matching_blocks())
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        self.assertEqual(matcher_blocks, delta_blocks)
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    def test_get_line_delta_blocks(self):
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    def create_gz_content(self, text):
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        sio = StringIO()
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        gz_file = gzip.GzipFile(mode='wb', fileobj=sio)
 
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        gz_file = tuned_gzip.GzipFile(mode='wb', fileobj=sio)
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        gz_file.write(text)
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        gz_file.close()
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        return sio.getvalue()
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        # could leave an empty .kndx file, which bzr would later claim was a
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        # corrupted file since the header was not present. In reality, the file
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        # just wasn't created, so it should be ignored.
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        t = get_transport('.')
 
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        t = transport.get_transport('.')
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        t.put_bytes('test.kndx', '')
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        knit = self.make_test_knit()
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    def test_knit_index_checks_header(self):
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        t = get_transport('.')
 
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        t = transport.get_transport('.')
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        t.put_bytes('test.kndx', '# not really a knit header\n\n')
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        k = self.make_test_knit()
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        self.assertRaises(KnitHeaderError, k.keys)