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Viewing changes to bzrlib/tests/test_btree_index.py

  • Committer: Guilherme Salgado
  • Date: 2009-12-22 16:42:34 UTC
  • mto: This revision was merged to the branch mainline in revision 4955.
  • Revision ID: salgado@canonical.com-20091222164234-0mr9n3x7biorkafg
First round of the new approach, using a new action (--preview) on the unshelve command

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bzrlib/tests/test_btree_index.py
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# Copyright (C) 2008, 2009, 2010 Canonical Ltd
 
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# Copyright (C) 2008, 2009 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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        condition_isinstance(TestBTreeNodes))
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    import bzrlib._btree_serializer_py as py_module
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    scenarios = [('python', {'parse_btree': py_module})]
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    if compiled_btreeparser_feature.available():
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        scenarios.append(('C', {'parse_btree':
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                                compiled_btreeparser_feature.module}))
 
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    if CompiledBtreeParserFeature.available():
 
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        # Is there a way to do this that gets missing feature failures rather
 
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        # than no indication to the user?
 
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        import bzrlib._btree_serializer_pyx as c_module
 
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        scenarios.append(('C', {'parse_btree': c_module}))
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    return multiply_tests(node_tests, scenarios, others)
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compiled_btreeparser_feature = tests.ModuleAvailableFeature(
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                                'bzrlib._btree_serializer_pyx')
 
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class _CompiledBtreeParserFeature(tests.Feature):
 
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    def _probe(self):
 
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        try:
 
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            import bzrlib._btree_serializer_pyx
 
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        except ImportError:
 
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            return False
 
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        return True
 
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    def feature_name(self):
 
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        return 'bzrlib._btree_serializer_pyx'
 
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CompiledBtreeParserFeature = _CompiledBtreeParserFeature()
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class BTreeTestCase(TestCaseWithTransport):
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    def setUp(self):
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        TestCaseWithTransport.setUp(self)
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        self.overrideAttr(btree_index, '_RESERVED_HEADER_BYTES', 100)
 
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        self._original_header = btree_index._RESERVED_HEADER_BYTES
 
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        def restore():
 
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            btree_index._RESERVED_HEADER_BYTES = self._original_header
 
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        self.addCleanup(restore)
 
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        btree_index._RESERVED_HEADER_BYTES = 100
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    def make_nodes(self, count, key_elements, reference_lists):
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        """Generate count*key_elements sample nodes."""
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    def shrink_page_size(self):
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        """Shrink the default page size so that less fits in a page."""
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        self.overrideAttr(btree_index, '_PAGE_SIZE')
 
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        old_page_size = btree_index._PAGE_SIZE
 
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        def cleanup():
 
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            btree_index._PAGE_SIZE = old_page_size
 
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        self.addCleanup(cleanup)
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        btree_index._PAGE_SIZE = 2048
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        size = trans.put_file('index', stream)
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        return btree_index.BTreeGraphIndex(trans, 'index', size)
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    def make_index_with_offset(self, ref_lists=1, key_elements=1, nodes=[],
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                               offset=0):
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        builder = btree_index.BTreeBuilder(key_elements=key_elements,
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                                           reference_lists=ref_lists)
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        builder.add_nodes(nodes)
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        transport = self.get_transport('')
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        # NamedTemporaryFile dies on builder.finish().read(). weird.
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        temp_file = builder.finish()
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        content = temp_file.read()
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        del temp_file
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        size = len(content)
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        transport.put_bytes('index', (' '*offset)+content)
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        return btree_index.BTreeGraphIndex(transport, 'index', size=size,
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                                           offset=offset)
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    def test_clear_cache(self):
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        nodes = self.make_nodes(160, 2, 2)
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        index = self.make_index(ref_lists=2, key_elements=2, nodes=nodes)
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            transport._activity)
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        self.assertEqual(1173, size)
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    def test_with_offset_no_size(self):
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        index = self.make_index_with_offset(key_elements=1, ref_lists=1,
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                                            offset=1234,
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                                            nodes=self.make_nodes(200, 1, 1))
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        index._size = None # throw away the size info
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        self.assertEqual(200, index.key_count())
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    def test_with_small_offset(self):
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        index = self.make_index_with_offset(key_elements=1, ref_lists=1,
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                                            offset=1234,
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                                            nodes=self.make_nodes(200, 1, 1))
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        self.assertEqual(200, index.key_count())
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    def test_with_large_offset(self):
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        index = self.make_index_with_offset(key_elements=1, ref_lists=1,
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                                            offset=123456,
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                                            nodes=self.make_nodes(200, 1, 1))
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        self.assertEqual(200, index.key_count())
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    def test__read_nodes_no_size_one_page_reads_once(self):
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        self.make_index(nodes=[(('key',), 'value', ())])
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        trans = get_transport('trace+' + self.get_url())
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class TestBTreeNodes(BTreeTestCase):
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    def restore_parser(self):
 
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        btree_index._btree_serializer = self.saved_parser
 
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    def setUp(self):
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        BTreeTestCase.setUp(self)
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        self.overrideAttr(btree_index, '_btree_serializer', self.parse_btree)
 
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        self.saved_parser = btree_index._btree_serializer
 
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        self.addCleanup(self.restore_parser)
 
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        btree_index._btree_serializer = self.parse_btree
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    def test_LeafNode_1_0(self):
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        node_bytes = ("type=leaf\n"
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    def test_exists(self):
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        # This is just to let the user know if they don't have the feature
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        # available
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        self.requireFeature(compiled_btreeparser_feature)
 
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        self.requireFeature(CompiledBtreeParserFeature)
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class TestMultiBisectRight(tests.TestCase):