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Viewing changes to bzrlib/tests/test_chunk_writer.py

  • Committer: Martin Pool
  • Date: 2005-06-28 03:02:31 UTC
  • Revision ID: mbp@sourcefrog.net-20050628030231-d311e4ebcd467ef4
Merge John's import-speedup branch:

                                                                                         
  777 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 22:20:32 -0500
      revision-id: john@arbash-meinel.com-20050627032031-e82a50db3863b18e
      bzr selftest was not using the correct bzr

  776 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 22:20:22 -0500
      revision-id: john@arbash-meinel.com-20050627032021-c9f21fde989ddaee
      Add was using an old mutter

  775 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 22:02:33 -0500
      revision-id: john@arbash-meinel.com-20050627030233-9165cfe98fc63298
      Cleaned up to be less different

  774 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 21:54:53 -0500
      revision-id: john@arbash-meinel.com-20050627025452-4260d0e744edef43
      Allow BZR_PLUGIN_PATH='' to negate plugin loading.

  773 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 21:49:34 -0500
      revision-id: john@arbash-meinel.com-20050627024933-b7158f67b7b9eae5
      Finished the previous cleanup (allowing load_plugins to be called twice)

  772 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 21:45:08 -0500
      revision-id: john@arbash-meinel.com-20050627024508-723b1df510d196fc
      Work on making the tests pass. versioning.py is calling run_cmd directly, but plugins have been loaded.

  771 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 21:32:29 -0500
      revision-id: john@arbash-meinel.com-20050627023228-79972744d7c53e15
      Got it down a little bit more by removing import of tree and inventory.

  770 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 21:26:05 -0500
      revision-id: john@arbash-meinel.com-20050627022604-350b9773ef622f95
      Reducing the number of import from bzrlib/__init__.py and bzrlib/branch.py

  769 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 20:32:25 -0500
      revision-id: john@arbash-meinel.com-20050627013225-32dd044f10d23948
      Updated revision.py and xml.py to include SubElement.

  768 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 20:03:56 -0500
      revision-id: john@arbash-meinel.com-20050627010356-ee66919e1c377faf
      Minor typo

  767 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 20:03:13 -0500
      revision-id: john@arbash-meinel.com-20050627010312-40d024007eb85051
      Caching the import

  766 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 19:51:47 -0500
      revision-id: john@arbash-meinel.com-20050627005147-5281c99e48ed1834
      Created wrapper functions for lazy import of ElementTree

  765 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 19:46:37 -0500
      revision-id: john@arbash-meinel.com-20050627004636-bf432902004a94c5
      Removed all of the test imports of cElementTree

  764 John Arbash Meinel <john@arbash-meinel.com>       Sun 2005-06-26 19:43:59 -0500
      revision-id: john@arbash-meinel.com-20050627004358-d137fbe9570dd71b
      Trying to make bzr startup faster.

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Lines of Context:
bzrlib/tests/test_chunk_writer.py
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# Copyright (C) 2008 Canonical Ltd
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#
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# This program is free software; you can redistribute it and/or modify
4
 
# it under the terms of the GNU General Public License as published by
5
 
# the Free Software Foundation; either version 2 of the License, or
6
 
# (at your option) any later version.
7
 
#
8
 
# This program is distributed in the hope that it will be useful,
9
 
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
 
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11
 
# GNU General Public License for more details.
12
 
#
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# You should have received a copy of the GNU General Public License
14
 
# along with this program; if not, write to the Free Software
15
 
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#
17
 
 
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"""Tests for writing fixed size chunks with compression."""
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20
 
import zlib
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22
 
from bzrlib import chunk_writer
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from bzrlib.tests import TestCaseWithTransport
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25
 
 
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class TestWriter(TestCaseWithTransport):
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    def check_chunk(self, bytes_list, size):
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        bytes = ''.join(bytes_list)
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        self.assertEqual(size, len(bytes))
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        return zlib.decompress(bytes)
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    def test_chunk_writer_empty(self):
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        writer = chunk_writer.ChunkWriter(4096)
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        bytes_list, unused, padding = writer.finish()
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        node_bytes = self.check_chunk(bytes_list, 4096)
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        self.assertEqual("", node_bytes)
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        self.assertEqual(None, unused)
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        # Only a zlib header.
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        self.assertEqual(4088, padding)
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    def test_optimize_for_speed(self):
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        writer = chunk_writer.ChunkWriter(4096)
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        writer.set_optimize(for_size=False)
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        self.assertEqual(chunk_writer.ChunkWriter._repack_opts_for_speed,
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                         (writer._max_repack, writer._max_zsync))
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        writer = chunk_writer.ChunkWriter(4096, optimize_for_size=False)
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        self.assertEqual(chunk_writer.ChunkWriter._repack_opts_for_speed,
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                         (writer._max_repack, writer._max_zsync))
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    def test_optimize_for_size(self):
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        writer = chunk_writer.ChunkWriter(4096)
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        writer.set_optimize(for_size=True)
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        self.assertEqual(chunk_writer.ChunkWriter._repack_opts_for_size,
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                         (writer._max_repack, writer._max_zsync))
56
 
        writer = chunk_writer.ChunkWriter(4096, optimize_for_size=True)
57
 
        self.assertEqual(chunk_writer.ChunkWriter._repack_opts_for_size,
58
 
                         (writer._max_repack, writer._max_zsync))
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60
 
    def test_some_data(self):
61
 
        writer = chunk_writer.ChunkWriter(4096)
62
 
        writer.write("foo bar baz quux\n")
63
 
        bytes_list, unused, padding = writer.finish()
64
 
        node_bytes = self.check_chunk(bytes_list, 4096)
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        self.assertEqual("foo bar baz quux\n", node_bytes)
66
 
        self.assertEqual(None, unused)
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        # More than just the header..
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        self.assertEqual(4073, padding)
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70
 
    def test_too_much_data_does_not_exceed_size(self):
71
 
        # Generate enough data to exceed 4K
72
 
        lines = []
73
 
        for group in range(48):
74
 
            offset = group * 50
75
 
            numbers = range(offset, offset + 50)
76
 
            # Create a line with this group
77
 
            lines.append(''.join(map(str, numbers)) + '\n')
78
 
        writer = chunk_writer.ChunkWriter(4096)
79
 
        for idx, line in enumerate(lines):
80
 
            if writer.write(line):
81
 
                self.assertEqual(46, idx)
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                break
83
 
        bytes_list, unused, _ = writer.finish()
84
 
        node_bytes = self.check_chunk(bytes_list, 4096)
85
 
        # the first 46 lines should have been added
86
 
        expected_bytes = ''.join(lines[:46])
87
 
        self.assertEqualDiff(expected_bytes, node_bytes)
88
 
        # And the line that failed should have been saved for us
89
 
        self.assertEqual(lines[46], unused)
90
 
 
91
 
    def test_too_much_data_preserves_reserve_space(self):
92
 
        # Generate enough data to exceed 4K
93
 
        lines = []
94
 
        for group in range(48):
95
 
            offset = group * 50
96
 
            numbers = range(offset, offset + 50)
97
 
            # Create a line with this group
98
 
            lines.append(''.join(map(str, numbers)) + '\n')
99
 
        writer = chunk_writer.ChunkWriter(4096, 256)
100
 
        for idx, line in enumerate(lines):
101
 
            if writer.write(line):
102
 
                self.assertEqual(44, idx)
103
 
                break
104
 
        else:
105
 
            self.fail('We were able to write all lines')
106
 
        self.assertFalse(writer.write("A"*256, reserved=True))
107
 
        bytes_list, unused, _ = writer.finish()
108
 
        node_bytes = self.check_chunk(bytes_list, 4096)
109
 
        # the first 44 lines should have been added
110
 
        expected_bytes = ''.join(lines[:44]) + "A"*256
111
 
        self.assertEqualDiff(expected_bytes, node_bytes)
112
 
        # And the line that failed should have been saved for us
113
 
        self.assertEqual(lines[44], unused)