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# Copyright (C) 2008, 2009, 2010 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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# 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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# 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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# 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 btree indices."""
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from bzrlib.tests import (
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TestCaseWithTransport,
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split_suite_by_condition,
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from bzrlib.transport import get_transport
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def load_tests(standard_tests, module, loader):
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# parameterise the TestBTreeNodes tests
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node_tests, others = split_suite_by_condition(standard_tests,
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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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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 BTreeTestCase(TestCaseWithTransport):
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# test names here are suffixed by the key length and reference list count
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TestCaseWithTransport.setUp(self)
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self.overrideAttr(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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for prefix_pos in range(key_elements):
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prefix = (str(prefix_pos) * 40,)
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for pos in xrange(count):
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# TODO: This creates odd keys. When count == 100,000, it
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# creates a 240 byte key
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key = prefix + (str(pos) * 40,)
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value = "value:%s" % pos
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# generate some references
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for list_pos in range(reference_lists):
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# as many keys in each list as its index + the key depth
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# mod 2 - this generates both 0 length lists and
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# ones slightly longer than the number of lists.
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# It also ensures we have non homogeneous lists.
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for ref_pos in range(list_pos + pos % 2):
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# refer to a nearby key
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refs[-1].append(prefix + ("ref" + str(pos - 1) * 40,))
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# serial of this ref in the ref list
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refs[-1].append(prefix + ("ref" + str(ref_pos) * 40,))
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refs[-1] = tuple(refs[-1])
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keys.append((key, value, refs))
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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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btree_index._PAGE_SIZE = 2048
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class TestBTreeBuilder(BTreeTestCase):
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def test_clear_cache(self):
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builder = btree_index.BTreeBuilder(reference_lists=0, key_elements=1)
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# This is a no-op, but we need the api to be consistent with other
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# BTreeGraphIndex apis.
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builder.clear_cache()
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def test_empty_1_0(self):
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builder = btree_index.BTreeBuilder(key_elements=1, reference_lists=0)
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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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"B+Tree Graph Index 2\nnode_ref_lists=0\nkey_elements=1\nlen=0\n"
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def test_empty_2_1(self):
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builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=1)
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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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"B+Tree Graph Index 2\nnode_ref_lists=1\nkey_elements=2\nlen=0\n"
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def test_root_leaf_1_0(self):
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builder = btree_index.BTreeBuilder(key_elements=1, reference_lists=0)
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nodes = self.make_nodes(5, 1, 0)
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builder.add_node(*node)
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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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self.assertEqual(131, len(content))
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"B+Tree Graph Index 2\nnode_ref_lists=0\nkey_elements=1\nlen=5\n"
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node_content = content[73:]
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node_bytes = zlib.decompress(node_content)
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expected_node = ("type=leaf\n"
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"0000000000000000000000000000000000000000\x00\x00value:0\n"
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"1111111111111111111111111111111111111111\x00\x00value:1\n"
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"2222222222222222222222222222222222222222\x00\x00value:2\n"
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"3333333333333333333333333333333333333333\x00\x00value:3\n"
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"4444444444444444444444444444444444444444\x00\x00value:4\n")
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self.assertEqual(expected_node, node_bytes)
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def test_root_leaf_2_2(self):
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builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2)
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nodes = self.make_nodes(5, 2, 2)
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builder.add_node(*node)
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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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self.assertEqual(238, len(content))
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"B+Tree Graph Index 2\nnode_ref_lists=2\nkey_elements=2\nlen=10\n"
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node_content = content[74:]
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node_bytes = zlib.decompress(node_content)
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"0000000000000000000000000000000000000000\x000000000000000000000000000000000000000000\x00\t0000000000000000000000000000000000000000\x00ref0000000000000000000000000000000000000000\x00value:0\n"
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"0000000000000000000000000000000000000000\x001111111111111111111111111111111111111111\x000000000000000000000000000000000000000000\x00ref0000000000000000000000000000000000000000\t0000000000000000000000000000000000000000\x00ref0000000000000000000000000000000000000000\r0000000000000000000000000000000000000000\x00ref0000000000000000000000000000000000000000\x00value:1\n"
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"0000000000000000000000000000000000000000\x002222222222222222222222222222222222222222\x00\t0000000000000000000000000000000000000000\x00ref0000000000000000000000000000000000000000\x00value:2\n"
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"0000000000000000000000000000000000000000\x003333333333333333333333333333333333333333\x000000000000000000000000000000000000000000\x00ref2222222222222222222222222222222222222222\t0000000000000000000000000000000000000000\x00ref2222222222222222222222222222222222222222\r0000000000000000000000000000000000000000\x00ref2222222222222222222222222222222222222222\x00value:3\n"
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"0000000000000000000000000000000000000000\x004444444444444444444444444444444444444444\x00\t0000000000000000000000000000000000000000\x00ref0000000000000000000000000000000000000000\x00value:4\n"
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"1111111111111111111111111111111111111111\x000000000000000000000000000000000000000000\x00\t1111111111111111111111111111111111111111\x00ref0000000000000000000000000000000000000000\x00value:0\n"
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"1111111111111111111111111111111111111111\x001111111111111111111111111111111111111111\x001111111111111111111111111111111111111111\x00ref0000000000000000000000000000000000000000\t1111111111111111111111111111111111111111\x00ref0000000000000000000000000000000000000000\r1111111111111111111111111111111111111111\x00ref0000000000000000000000000000000000000000\x00value:1\n"
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"1111111111111111111111111111111111111111\x002222222222222222222222222222222222222222\x00\t1111111111111111111111111111111111111111\x00ref0000000000000000000000000000000000000000\x00value:2\n"
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"1111111111111111111111111111111111111111\x003333333333333333333333333333333333333333\x001111111111111111111111111111111111111111\x00ref2222222222222222222222222222222222222222\t1111111111111111111111111111111111111111\x00ref2222222222222222222222222222222222222222\r1111111111111111111111111111111111111111\x00ref2222222222222222222222222222222222222222\x00value:3\n"
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"1111111111111111111111111111111111111111\x004444444444444444444444444444444444444444\x00\t1111111111111111111111111111111111111111\x00ref0000000000000000000000000000000000000000\x00value:4\n"
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self.assertEqual(expected_node, node_bytes)
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def test_2_leaves_1_0(self):
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builder = btree_index.BTreeBuilder(key_elements=1, reference_lists=0)
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nodes = self.make_nodes(400, 1, 0)
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builder.add_node(*node)
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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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self.assertEqual(9283, len(content))
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"B+Tree Graph Index 2\nnode_ref_lists=0\nkey_elements=1\nlen=400\n"
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root = content[77:4096]
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leaf1 = content[4096:8192]
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leaf2 = content[8192:]
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root_bytes = zlib.decompress(root)
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) + ("307" * 40) + "\n"
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self.assertEqual(expected_root, root_bytes)
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# We already know serialisation works for leaves, check key selection:
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leaf1_bytes = zlib.decompress(leaf1)
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sorted_node_keys = sorted(node[0] for node in nodes)
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node = btree_index._LeafNode(leaf1_bytes, 1, 0)
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self.assertEqual(231, len(node.keys))
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self.assertEqual(sorted_node_keys[:231], sorted(node.keys))
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leaf2_bytes = zlib.decompress(leaf2)
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node = btree_index._LeafNode(leaf2_bytes, 1, 0)
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self.assertEqual(400 - 231, len(node.keys))
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self.assertEqual(sorted_node_keys[231:], sorted(node.keys))
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def test_last_page_rounded_1_layer(self):
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builder = btree_index.BTreeBuilder(key_elements=1, reference_lists=0)
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nodes = self.make_nodes(10, 1, 0)
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builder.add_node(*node)
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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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self.assertEqual(155, len(content))
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"B+Tree Graph Index 2\nnode_ref_lists=0\nkey_elements=1\nlen=10\n"
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# Check thelast page is well formed
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leaf2_bytes = zlib.decompress(leaf2)
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node = btree_index._LeafNode(leaf2_bytes, 1, 0)
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self.assertEqual(10, len(node.keys))
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sorted_node_keys = sorted(node[0] for node in nodes)
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self.assertEqual(sorted_node_keys, sorted(node.keys))
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def test_last_page_not_rounded_2_layer(self):
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builder = btree_index.BTreeBuilder(key_elements=1, reference_lists=0)
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nodes = self.make_nodes(400, 1, 0)
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builder.add_node(*node)
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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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self.assertEqual(9283, len(content))
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"B+Tree Graph Index 2\nnode_ref_lists=0\nkey_elements=1\nlen=400\n"
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# Check the last page is well formed
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leaf2 = content[8192:]
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leaf2_bytes = zlib.decompress(leaf2)
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node = btree_index._LeafNode(leaf2_bytes, 1, 0)
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self.assertEqual(400 - 231, len(node.keys))
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sorted_node_keys = sorted(node[0] for node in nodes)
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self.assertEqual(sorted_node_keys[231:], sorted(node.keys))
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def test_three_level_tree_details(self):
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# The left most pointer in the second internal node in a row should
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# pointer to the second node that the internal node is for, _not_
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# the first, otherwise the first node overlaps with the last node of
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# the prior internal node on that row.
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self.shrink_page_size()
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builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2)
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# 40K nodes is enough to create a two internal nodes on the second
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# level, with a 2K page size
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nodes = self.make_nodes(20000, 2, 2)
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builder.add_node(*node)
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transport = get_transport('trace+' + self.get_url(''))
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size = transport.put_file('index', self.time(builder.finish))
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index = btree_index.BTreeGraphIndex(transport, 'index', size)
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# Seed the metadata, we're using internal calls now.
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self.assertEqual(3, len(index._row_lengths),
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"Not enough rows: %r" % index._row_lengths)
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self.assertEqual(4, len(index._row_offsets))
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self.assertEqual(sum(index._row_lengths), index._row_offsets[-1])
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internal_nodes = index._get_internal_nodes([0, 1, 2])
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root_node = internal_nodes[0]
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internal_node1 = internal_nodes[1]
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internal_node2 = internal_nodes[2]
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# The left most node node2 points at should be one after the right most
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# node pointed at by node1.
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self.assertEqual(internal_node2.offset, 1 + len(internal_node1.keys))
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# The left most key of the second node pointed at by internal_node2
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# should be its first key. We can check this by looking for its first key
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# in the second node it points at
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pos = index._row_offsets[2] + internal_node2.offset + 1
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leaf = index._get_leaf_nodes([pos])[pos]
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self.assertTrue(internal_node2.keys[0] in leaf.keys)
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def test_2_leaves_2_2(self):
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builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2)
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nodes = self.make_nodes(100, 2, 2)
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builder.add_node(*node)
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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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self.assertEqual(12643, len(content))
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"B+Tree Graph Index 2\nnode_ref_lists=2\nkey_elements=2\nlen=200\n"
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root = content[77:4096]
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leaf1 = content[4096:8192]
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leaf2 = content[8192:12288]
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leaf3 = content[12288:]
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root_bytes = zlib.decompress(root)
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+ ("0" * 40) + "\x00" + ("91" * 40) + "\n"
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+ ("1" * 40) + "\x00" + ("81" * 40) + "\n"
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self.assertEqual(expected_root, root_bytes)
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# We assume the other leaf nodes have been written correctly - layering
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def test_spill_index_stress_1_1(self):
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builder = btree_index.BTreeBuilder(key_elements=1, spill_at=2)
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nodes = [node[0:2] for node in self.make_nodes(16, 1, 0)]
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builder.add_node(*nodes[0])
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# Test the parts of the index that take up memory are doing so
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self.assertEqual(1, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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builder.add_node(*nodes[1])
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self.assertEqual(0, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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self.assertEqual(1, len(builder._backing_indices))
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self.assertEqual(2, builder._backing_indices[0].key_count())
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builder.add_node(*nodes[2])
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self.assertEqual(1, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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# And spills to a second backing index combing all
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builder.add_node(*nodes[3])
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self.assertEqual(0, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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self.assertEqual(2, len(builder._backing_indices))
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self.assertEqual(None, builder._backing_indices[0])
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self.assertEqual(4, builder._backing_indices[1].key_count())
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# The next spills to the 2-len slot
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builder.add_node(*nodes[4])
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builder.add_node(*nodes[5])
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self.assertEqual(0, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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self.assertEqual(2, len(builder._backing_indices))
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self.assertEqual(2, builder._backing_indices[0].key_count())
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self.assertEqual(4, builder._backing_indices[1].key_count())
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# Next spill combines
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builder.add_node(*nodes[6])
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builder.add_node(*nodes[7])
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self.assertEqual(3, len(builder._backing_indices))
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self.assertEqual(None, builder._backing_indices[0])
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self.assertEqual(None, builder._backing_indices[1])
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self.assertEqual(8, builder._backing_indices[2].key_count())
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# And so forth - counting up in binary.
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builder.add_node(*nodes[8])
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builder.add_node(*nodes[9])
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self.assertEqual(3, len(builder._backing_indices))
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self.assertEqual(2, builder._backing_indices[0].key_count())
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self.assertEqual(None, builder._backing_indices[1])
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self.assertEqual(8, builder._backing_indices[2].key_count())
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builder.add_node(*nodes[10])
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builder.add_node(*nodes[11])
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self.assertEqual(3, len(builder._backing_indices))
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self.assertEqual(None, builder._backing_indices[0])
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self.assertEqual(4, builder._backing_indices[1].key_count())
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self.assertEqual(8, builder._backing_indices[2].key_count())
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builder.add_node(*nodes[12])
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# Test that memory and disk are both used for query methods; and that
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# None is skipped over happily.
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self.assertEqual([(builder,) + node for node in sorted(nodes[:13])],
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list(builder.iter_all_entries()))
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# Two nodes - one memory one disk
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self.assertEqual(set([(builder,) + node for node in nodes[11:13]]),
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set(builder.iter_entries([nodes[12][0], nodes[11][0]])))
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self.assertEqual(13, builder.key_count())
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self.assertEqual(set([(builder,) + node for node in nodes[11:13]]),
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set(builder.iter_entries_prefix([nodes[12][0], nodes[11][0]])))
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builder.add_node(*nodes[13])
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self.assertEqual(3, len(builder._backing_indices))
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self.assertEqual(2, builder._backing_indices[0].key_count())
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self.assertEqual(4, builder._backing_indices[1].key_count())
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self.assertEqual(8, builder._backing_indices[2].key_count())
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builder.add_node(*nodes[14])
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builder.add_node(*nodes[15])
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self.assertEqual(4, len(builder._backing_indices))
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self.assertEqual(None, builder._backing_indices[0])
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self.assertEqual(None, builder._backing_indices[1])
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self.assertEqual(None, builder._backing_indices[2])
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self.assertEqual(16, builder._backing_indices[3].key_count())
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# Now finish, and check we got a correctly ordered tree
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transport = self.get_transport('')
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size = transport.put_file('index', builder.finish())
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index = btree_index.BTreeGraphIndex(transport, 'index', size)
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nodes = list(index.iter_all_entries())
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self.assertEqual(sorted(nodes), nodes)
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self.assertEqual(16, len(nodes))
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def test_spill_index_stress_1_1_no_combine(self):
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builder = btree_index.BTreeBuilder(key_elements=1, spill_at=2)
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builder.set_optimize(for_size=False, combine_backing_indices=False)
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nodes = [node[0:2] for node in self.make_nodes(16, 1, 0)]
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builder.add_node(*nodes[0])
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# Test the parts of the index that take up memory are doing so
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self.assertEqual(1, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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builder.add_node(*nodes[1])
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self.assertEqual(0, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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self.assertEqual(1, len(builder._backing_indices))
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self.assertEqual(2, builder._backing_indices[0].key_count())
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builder.add_node(*nodes[2])
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self.assertEqual(1, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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# And spills to a second backing index but doesn't combine
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builder.add_node(*nodes[3])
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self.assertEqual(0, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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self.assertEqual(2, len(builder._backing_indices))
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for backing_index in builder._backing_indices:
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self.assertEqual(2, backing_index.key_count())
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# The next spills to the 3rd slot
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builder.add_node(*nodes[4])
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builder.add_node(*nodes[5])
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self.assertEqual(0, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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self.assertEqual(3, len(builder._backing_indices))
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for backing_index in builder._backing_indices:
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self.assertEqual(2, backing_index.key_count())
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# Now spill a few more, and check that we don't combine
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builder.add_node(*nodes[6])
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builder.add_node(*nodes[7])
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builder.add_node(*nodes[8])
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builder.add_node(*nodes[9])
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builder.add_node(*nodes[10])
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builder.add_node(*nodes[11])
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builder.add_node(*nodes[12])
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self.assertEqual(6, len(builder._backing_indices))
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for backing_index in builder._backing_indices:
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self.assertEqual(2, backing_index.key_count())
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# Test that memory and disk are both used for query methods; and that
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# None is skipped over happily.
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self.assertEqual([(builder,) + node for node in sorted(nodes[:13])],
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list(builder.iter_all_entries()))
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# Two nodes - one memory one disk
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self.assertEqual(set([(builder,) + node for node in nodes[11:13]]),
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set(builder.iter_entries([nodes[12][0], nodes[11][0]])))
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self.assertEqual(13, builder.key_count())
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self.assertEqual(set([(builder,) + node for node in nodes[11:13]]),
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set(builder.iter_entries_prefix([nodes[12][0], nodes[11][0]])))
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builder.add_node(*nodes[13])
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builder.add_node(*nodes[14])
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builder.add_node(*nodes[15])
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self.assertEqual(8, len(builder._backing_indices))
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for backing_index in builder._backing_indices:
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self.assertEqual(2, backing_index.key_count())
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# Now finish, and check we got a correctly ordered tree
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transport = self.get_transport('')
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size = transport.put_file('index', builder.finish())
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index = btree_index.BTreeGraphIndex(transport, 'index', size)
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nodes = list(index.iter_all_entries())
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self.assertEqual(sorted(nodes), nodes)
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self.assertEqual(16, len(nodes))
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def test_set_optimize(self):
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builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2)
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builder.set_optimize(for_size=True)
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self.assertTrue(builder._optimize_for_size)
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builder.set_optimize(for_size=False)
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self.assertFalse(builder._optimize_for_size)
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# test that we can set combine_backing_indices without effecting
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builder._optimize_for_size = obj
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builder.set_optimize(combine_backing_indices=False)
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self.assertFalse(builder._combine_backing_indices)
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self.assertIs(obj, builder._optimize_for_size)
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builder.set_optimize(combine_backing_indices=True)
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self.assertTrue(builder._combine_backing_indices)
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self.assertIs(obj, builder._optimize_for_size)
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def test_spill_index_stress_2_2(self):
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# test that references and longer keys don't confuse things.
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builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2,
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nodes = self.make_nodes(16, 2, 2)
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builder.add_node(*nodes[0])
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# Test the parts of the index that take up memory are doing so
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self.assertEqual(1, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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builder.add_node(*nodes[1])
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self.assertEqual(0, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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self.assertEqual(1, len(builder._backing_indices))
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self.assertEqual(2, builder._backing_indices[0].key_count())
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old = dict(builder._get_nodes_by_key()) #Build up the nodes by key dict
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builder.add_node(*nodes[2])
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self.assertEqual(1, len(builder._nodes))
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self.assertIsNot(None, builder._nodes_by_key)
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self.assertNotEqual({}, builder._nodes_by_key)
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# We should have a new entry
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self.assertNotEqual(old, builder._nodes_by_key)
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# And spills to a second backing index combing all
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builder.add_node(*nodes[3])
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self.assertEqual(0, len(builder._nodes))
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self.assertIs(None, builder._nodes_by_key)
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self.assertEqual(2, len(builder._backing_indices))
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self.assertEqual(None, builder._backing_indices[0])
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self.assertEqual(4, builder._backing_indices[1].key_count())
534
# The next spills to the 2-len slot
535
builder.add_node(*nodes[4])
536
builder.add_node(*nodes[5])
537
self.assertEqual(0, len(builder._nodes))
538
self.assertIs(None, builder._nodes_by_key)
539
self.assertEqual(2, len(builder._backing_indices))
540
self.assertEqual(2, builder._backing_indices[0].key_count())
541
self.assertEqual(4, builder._backing_indices[1].key_count())
542
# Next spill combines
543
builder.add_node(*nodes[6])
544
builder.add_node(*nodes[7])
545
self.assertEqual(3, len(builder._backing_indices))
546
self.assertEqual(None, builder._backing_indices[0])
547
self.assertEqual(None, builder._backing_indices[1])
548
self.assertEqual(8, builder._backing_indices[2].key_count())
549
# And so forth - counting up in binary.
550
builder.add_node(*nodes[8])
551
builder.add_node(*nodes[9])
552
self.assertEqual(3, len(builder._backing_indices))
553
self.assertEqual(2, builder._backing_indices[0].key_count())
554
self.assertEqual(None, builder._backing_indices[1])
555
self.assertEqual(8, builder._backing_indices[2].key_count())
556
builder.add_node(*nodes[10])
557
builder.add_node(*nodes[11])
558
self.assertEqual(3, len(builder._backing_indices))
559
self.assertEqual(None, builder._backing_indices[0])
560
self.assertEqual(4, builder._backing_indices[1].key_count())
561
self.assertEqual(8, builder._backing_indices[2].key_count())
562
builder.add_node(*nodes[12])
563
# Test that memory and disk are both used for query methods; and that
564
# None is skipped over happily.
565
self.assertEqual([(builder,) + node for node in sorted(nodes[:13])],
566
list(builder.iter_all_entries()))
567
# Two nodes - one memory one disk
568
self.assertEqual(set([(builder,) + node for node in nodes[11:13]]),
569
set(builder.iter_entries([nodes[12][0], nodes[11][0]])))
570
self.assertEqual(13, builder.key_count())
571
self.assertEqual(set([(builder,) + node for node in nodes[11:13]]),
572
set(builder.iter_entries_prefix([nodes[12][0], nodes[11][0]])))
573
builder.add_node(*nodes[13])
574
self.assertEqual(3, len(builder._backing_indices))
575
self.assertEqual(2, builder._backing_indices[0].key_count())
576
self.assertEqual(4, builder._backing_indices[1].key_count())
577
self.assertEqual(8, builder._backing_indices[2].key_count())
578
builder.add_node(*nodes[14])
579
builder.add_node(*nodes[15])
580
self.assertEqual(4, len(builder._backing_indices))
581
self.assertEqual(None, builder._backing_indices[0])
582
self.assertEqual(None, builder._backing_indices[1])
583
self.assertEqual(None, builder._backing_indices[2])
584
self.assertEqual(16, builder._backing_indices[3].key_count())
585
# Now finish, and check we got a correctly ordered tree
586
transport = self.get_transport('')
587
size = transport.put_file('index', builder.finish())
588
index = btree_index.BTreeGraphIndex(transport, 'index', size)
589
nodes = list(index.iter_all_entries())
590
self.assertEqual(sorted(nodes), nodes)
591
self.assertEqual(16, len(nodes))
593
def test_spill_index_duplicate_key_caught_on_finish(self):
594
builder = btree_index.BTreeBuilder(key_elements=1, spill_at=2)
595
nodes = [node[0:2] for node in self.make_nodes(16, 1, 0)]
596
builder.add_node(*nodes[0])
597
builder.add_node(*nodes[1])
598
builder.add_node(*nodes[0])
599
self.assertRaises(errors.BadIndexDuplicateKey, builder.finish)
602
class TestBTreeIndex(BTreeTestCase):
604
def make_index(self, ref_lists=0, key_elements=1, nodes=[]):
605
builder = btree_index.BTreeBuilder(reference_lists=ref_lists,
606
key_elements=key_elements)
607
for key, value, references in nodes:
608
builder.add_node(key, value, references)
609
stream = builder.finish()
610
trans = get_transport('trace+' + self.get_url())
611
size = trans.put_file('index', stream)
612
return btree_index.BTreeGraphIndex(trans, 'index', size)
614
def test_clear_cache(self):
615
nodes = self.make_nodes(160, 2, 2)
616
index = self.make_index(ref_lists=2, key_elements=2, nodes=nodes)
617
self.assertEqual(1, len(list(index.iter_entries([nodes[30][0]]))))
618
self.assertEqual([1, 4], index._row_lengths)
619
self.assertIsNot(None, index._root_node)
620
internal_node_pre_clear = index._internal_node_cache.keys()
621
self.assertTrue(len(index._leaf_node_cache) > 0)
623
# We don't touch _root_node or _internal_node_cache, both should be
624
# small, and can save a round trip or two
625
self.assertIsNot(None, index._root_node)
626
# NOTE: We don't want to affect the _internal_node_cache, as we expect
627
# it will be small, and if we ever do touch this index again, it
628
# will save round-trips. This assertion isn't very strong,
629
# becuase without a 3-level index, we don't have any internal
631
self.assertEqual(internal_node_pre_clear,
632
index._internal_node_cache.keys())
633
self.assertEqual(0, len(index._leaf_node_cache))
635
def test_trivial_constructor(self):
636
transport = get_transport('trace+' + self.get_url(''))
637
index = btree_index.BTreeGraphIndex(transport, 'index', None)
638
# Checks the page size at load, but that isn't logged yet.
639
self.assertEqual([], transport._activity)
641
def test_with_size_constructor(self):
642
transport = get_transport('trace+' + self.get_url(''))
643
index = btree_index.BTreeGraphIndex(transport, 'index', 1)
644
# Checks the page size at load, but that isn't logged yet.
645
self.assertEqual([], transport._activity)
647
def test_empty_key_count_no_size(self):
648
builder = btree_index.BTreeBuilder(key_elements=1, reference_lists=0)
649
transport = get_transport('trace+' + self.get_url(''))
650
transport.put_file('index', builder.finish())
651
index = btree_index.BTreeGraphIndex(transport, 'index', None)
652
del transport._activity[:]
653
self.assertEqual([], transport._activity)
654
self.assertEqual(0, index.key_count())
655
# The entire index should have been requested (as we generally have the
656
# size available, and doing many small readvs is inappropriate).
657
# We can't tell how much was actually read here, but - check the code.
658
self.assertEqual([('get', 'index')], transport._activity)
660
def test_empty_key_count(self):
661
builder = btree_index.BTreeBuilder(key_elements=1, reference_lists=0)
662
transport = get_transport('trace+' + self.get_url(''))
663
size = transport.put_file('index', builder.finish())
664
self.assertEqual(72, size)
665
index = btree_index.BTreeGraphIndex(transport, 'index', size)
666
del transport._activity[:]
667
self.assertEqual([], transport._activity)
668
self.assertEqual(0, index.key_count())
669
# The entire index should have been read, as 4K > size
670
self.assertEqual([('readv', 'index', [(0, 72)], False, None)],
673
def test_non_empty_key_count_2_2(self):
674
builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2)
675
nodes = self.make_nodes(35, 2, 2)
677
builder.add_node(*node)
678
transport = get_transport('trace+' + self.get_url(''))
679
size = transport.put_file('index', builder.finish())
680
index = btree_index.BTreeGraphIndex(transport, 'index', size)
681
del transport._activity[:]
682
self.assertEqual([], transport._activity)
683
self.assertEqual(70, index.key_count())
684
# The entire index should have been read, as it is one page long.
685
self.assertEqual([('readv', 'index', [(0, size)], False, None)],
687
self.assertEqual(1173, size)
689
def test__read_nodes_no_size_one_page_reads_once(self):
690
self.make_index(nodes=[(('key',), 'value', ())])
691
trans = get_transport('trace+' + self.get_url())
692
index = btree_index.BTreeGraphIndex(trans, 'index', None)
693
del trans._activity[:]
694
nodes = dict(index._read_nodes([0]))
695
self.assertEqual([0], nodes.keys())
697
self.assertEqual([('key',)], node.keys.keys())
698
self.assertEqual([('get', 'index')], trans._activity)
700
def test__read_nodes_no_size_multiple_pages(self):
701
index = self.make_index(2, 2, nodes=self.make_nodes(160, 2, 2))
703
num_pages = index._row_offsets[-1]
704
# Reopen with a traced transport and no size
705
trans = get_transport('trace+' + self.get_url())
706
index = btree_index.BTreeGraphIndex(trans, 'index', None)
707
del trans._activity[:]
708
nodes = dict(index._read_nodes([0]))
709
self.assertEqual(range(num_pages), nodes.keys())
711
def test_2_levels_key_count_2_2(self):
712
builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2)
713
nodes = self.make_nodes(160, 2, 2)
715
builder.add_node(*node)
716
transport = get_transport('trace+' + self.get_url(''))
717
size = transport.put_file('index', builder.finish())
718
self.assertEqual(17692, size)
719
index = btree_index.BTreeGraphIndex(transport, 'index', size)
720
del transport._activity[:]
721
self.assertEqual([], transport._activity)
722
self.assertEqual(320, index.key_count())
723
# The entire index should not have been read.
724
self.assertEqual([('readv', 'index', [(0, 4096)], False, None)],
727
def test_validate_one_page(self):
728
builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2)
729
nodes = self.make_nodes(45, 2, 2)
731
builder.add_node(*node)
732
transport = get_transport('trace+' + self.get_url(''))
733
size = transport.put_file('index', builder.finish())
734
index = btree_index.BTreeGraphIndex(transport, 'index', size)
735
del transport._activity[:]
736
self.assertEqual([], transport._activity)
738
# The entire index should have been read linearly.
739
self.assertEqual([('readv', 'index', [(0, size)], False, None)],
741
self.assertEqual(1488, size)
743
def test_validate_two_pages(self):
744
builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2)
745
nodes = self.make_nodes(80, 2, 2)
747
builder.add_node(*node)
748
transport = get_transport('trace+' + self.get_url(''))
749
size = transport.put_file('index', builder.finish())
750
# Root page, 2 leaf pages
751
self.assertEqual(9339, size)
752
index = btree_index.BTreeGraphIndex(transport, 'index', size)
753
del transport._activity[:]
754
self.assertEqual([], transport._activity)
756
# The entire index should have been read linearly.
757
self.assertEqual([('readv', 'index', [(0, 4096)], False, None),
758
('readv', 'index', [(4096, 4096), (8192, 1147)], False, None)],
760
# XXX: TODO: write some badly-ordered nodes, and some pointers-to-wrong
761
# node and make validate find them.
763
def test_eq_ne(self):
764
# two indices are equal when constructed with the same parameters:
765
transport1 = get_transport('trace+' + self.get_url(''))
766
transport2 = get_transport(self.get_url(''))
768
btree_index.BTreeGraphIndex(transport1, 'index', None) ==
769
btree_index.BTreeGraphIndex(transport1, 'index', None))
771
btree_index.BTreeGraphIndex(transport1, 'index', 20) ==
772
btree_index.BTreeGraphIndex(transport1, 'index', 20))
774
btree_index.BTreeGraphIndex(transport1, 'index', 20) ==
775
btree_index.BTreeGraphIndex(transport2, 'index', 20))
777
btree_index.BTreeGraphIndex(transport1, 'inde1', 20) ==
778
btree_index.BTreeGraphIndex(transport1, 'inde2', 20))
780
btree_index.BTreeGraphIndex(transport1, 'index', 10) ==
781
btree_index.BTreeGraphIndex(transport1, 'index', 20))
783
btree_index.BTreeGraphIndex(transport1, 'index', None) !=
784
btree_index.BTreeGraphIndex(transport1, 'index', None))
786
btree_index.BTreeGraphIndex(transport1, 'index', 20) !=
787
btree_index.BTreeGraphIndex(transport1, 'index', 20))
789
btree_index.BTreeGraphIndex(transport1, 'index', 20) !=
790
btree_index.BTreeGraphIndex(transport2, 'index', 20))
792
btree_index.BTreeGraphIndex(transport1, 'inde1', 20) !=
793
btree_index.BTreeGraphIndex(transport1, 'inde2', 20))
795
btree_index.BTreeGraphIndex(transport1, 'index', 10) !=
796
btree_index.BTreeGraphIndex(transport1, 'index', 20))
798
def test_iter_all_only_root_no_size(self):
799
self.make_index(nodes=[(('key',), 'value', ())])
800
trans = get_transport('trace+' + self.get_url(''))
801
index = btree_index.BTreeGraphIndex(trans, 'index', None)
802
del trans._activity[:]
803
self.assertEqual([(('key',), 'value')],
804
[x[1:] for x in index.iter_all_entries()])
805
self.assertEqual([('get', 'index')], trans._activity)
807
def test_iter_all_entries_reads(self):
808
# iterating all entries reads the header, then does a linear
810
self.shrink_page_size()
811
builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2)
812
# 20k nodes is enough to create a two internal nodes on the second
813
# level, with a 2K page size
814
nodes = self.make_nodes(10000, 2, 2)
816
builder.add_node(*node)
817
transport = get_transport('trace+' + self.get_url(''))
818
size = transport.put_file('index', builder.finish())
819
self.assertEqual(1303220, size, 'number of expected bytes in the'
821
page_size = btree_index._PAGE_SIZE
823
index = btree_index.BTreeGraphIndex(transport, 'index', size)
824
del transport._activity[:]
825
self.assertEqual([], transport._activity)
826
found_nodes = self.time(list, index.iter_all_entries())
828
for node in found_nodes:
829
self.assertTrue(node[0] is index)
830
bare_nodes.append(node[1:])
831
self.assertEqual(3, len(index._row_lengths),
832
"Not enough rows: %r" % index._row_lengths)
833
# Should be as long as the nodes we supplied
834
self.assertEqual(20000, len(found_nodes))
835
# Should have the same content
836
self.assertEqual(set(nodes), set(bare_nodes))
837
# Should have done linear scan IO up the index, ignoring
838
# the internal nodes:
839
# The entire index should have been read
840
total_pages = sum(index._row_lengths)
841
self.assertEqual(total_pages, index._row_offsets[-1])
842
self.assertEqual(1303220, size)
843
# The start of the leaves
844
first_byte = index._row_offsets[-2] * page_size
846
for offset in range(first_byte, size, page_size):
847
readv_request.append((offset, page_size))
848
# The last page is truncated
849
readv_request[-1] = (readv_request[-1][0], 1303220 % page_size)
850
expected = [('readv', 'index', [(0, page_size)], False, None),
851
('readv', 'index', readv_request, False, None)]
852
if expected != transport._activity:
853
self.assertEqualDiff(pprint.pformat(expected),
854
pprint.pformat(transport._activity))
856
def _test_iter_entries_references_resolved(self):
857
index = self.make_index(1, nodes=[
858
(('name', ), 'data', ([('ref', ), ('ref', )], )),
859
(('ref', ), 'refdata', ([], ))])
860
self.assertEqual(set([(index, ('name', ), 'data', ((('ref',),('ref',)),)),
861
(index, ('ref', ), 'refdata', ((), ))]),
862
set(index.iter_entries([('name',), ('ref',)])))
864
def test_iter_entries_references_2_refs_resolved(self):
865
# iterating some entries reads just the pages needed. For now, to
866
# get it working and start measuring, only 4K pages are read.
867
builder = btree_index.BTreeBuilder(key_elements=2, reference_lists=2)
868
# 80 nodes is enough to create a two-level index.
869
nodes = self.make_nodes(160, 2, 2)
871
builder.add_node(*node)
872
transport = get_transport('trace+' + self.get_url(''))
873
size = transport.put_file('index', builder.finish())
875
index = btree_index.BTreeGraphIndex(transport, 'index', size)
876
del transport._activity[:]
877
self.assertEqual([], transport._activity)
879
found_nodes = list(index.iter_entries([nodes[30][0]]))
881
for node in found_nodes:
882
self.assertTrue(node[0] is index)
883
bare_nodes.append(node[1:])
884
# Should be as long as the nodes we supplied
885
self.assertEqual(1, len(found_nodes))
886
# Should have the same content
887
self.assertEqual(nodes[30], bare_nodes[0])
888
# Should have read the root node, then one leaf page:
889
self.assertEqual([('readv', 'index', [(0, 4096)], False, None),
890
('readv', 'index', [(8192, 4096), ], False, None)],
893
def test_iter_key_prefix_1_element_key_None(self):
894
index = self.make_index()
895
self.assertRaises(errors.BadIndexKey, list,
896
index.iter_entries_prefix([(None, )]))
898
def test_iter_key_prefix_wrong_length(self):
899
index = self.make_index()
900
self.assertRaises(errors.BadIndexKey, list,
901
index.iter_entries_prefix([('foo', None)]))
902
index = self.make_index(key_elements=2)
903
self.assertRaises(errors.BadIndexKey, list,
904
index.iter_entries_prefix([('foo', )]))
905
self.assertRaises(errors.BadIndexKey, list,
906
index.iter_entries_prefix([('foo', None, None)]))
908
def test_iter_key_prefix_1_key_element_no_refs(self):
909
index = self.make_index( nodes=[
910
(('name', ), 'data', ()),
911
(('ref', ), 'refdata', ())])
912
self.assertEqual(set([(index, ('name', ), 'data'),
913
(index, ('ref', ), 'refdata')]),
914
set(index.iter_entries_prefix([('name', ), ('ref', )])))
916
def test_iter_key_prefix_1_key_element_refs(self):
917
index = self.make_index(1, nodes=[
918
(('name', ), 'data', ([('ref', )], )),
919
(('ref', ), 'refdata', ([], ))])
920
self.assertEqual(set([(index, ('name', ), 'data', ((('ref',),),)),
921
(index, ('ref', ), 'refdata', ((), ))]),
922
set(index.iter_entries_prefix([('name', ), ('ref', )])))
924
def test_iter_key_prefix_2_key_element_no_refs(self):
925
index = self.make_index(key_elements=2, nodes=[
926
(('name', 'fin1'), 'data', ()),
927
(('name', 'fin2'), 'beta', ()),
928
(('ref', 'erence'), 'refdata', ())])
929
self.assertEqual(set([(index, ('name', 'fin1'), 'data'),
930
(index, ('ref', 'erence'), 'refdata')]),
931
set(index.iter_entries_prefix([('name', 'fin1'), ('ref', 'erence')])))
932
self.assertEqual(set([(index, ('name', 'fin1'), 'data'),
933
(index, ('name', 'fin2'), 'beta')]),
934
set(index.iter_entries_prefix([('name', None)])))
936
def test_iter_key_prefix_2_key_element_refs(self):
937
index = self.make_index(1, key_elements=2, nodes=[
938
(('name', 'fin1'), 'data', ([('ref', 'erence')], )),
939
(('name', 'fin2'), 'beta', ([], )),
940
(('ref', 'erence'), 'refdata', ([], ))])
941
self.assertEqual(set([(index, ('name', 'fin1'), 'data', ((('ref', 'erence'),),)),
942
(index, ('ref', 'erence'), 'refdata', ((), ))]),
943
set(index.iter_entries_prefix([('name', 'fin1'), ('ref', 'erence')])))
944
self.assertEqual(set([(index, ('name', 'fin1'), 'data', ((('ref', 'erence'),),)),
945
(index, ('name', 'fin2'), 'beta', ((), ))]),
946
set(index.iter_entries_prefix([('name', None)])))
948
# XXX: external_references tests are duplicated in test_index. We
949
# probably should have per_graph_index tests...
950
def test_external_references_no_refs(self):
951
index = self.make_index(ref_lists=0, nodes=[])
952
self.assertRaises(ValueError, index.external_references, 0)
954
def test_external_references_no_results(self):
955
index = self.make_index(ref_lists=1, nodes=[
956
(('key',), 'value', ([],))])
957
self.assertEqual(set(), index.external_references(0))
959
def test_external_references_missing_ref(self):
960
missing_key = ('missing',)
961
index = self.make_index(ref_lists=1, nodes=[
962
(('key',), 'value', ([missing_key],))])
963
self.assertEqual(set([missing_key]), index.external_references(0))
965
def test_external_references_multiple_ref_lists(self):
966
missing_key = ('missing',)
967
index = self.make_index(ref_lists=2, nodes=[
968
(('key',), 'value', ([], [missing_key]))])
969
self.assertEqual(set([]), index.external_references(0))
970
self.assertEqual(set([missing_key]), index.external_references(1))
972
def test_external_references_two_records(self):
973
index = self.make_index(ref_lists=1, nodes=[
974
(('key-1',), 'value', ([('key-2',)],)),
975
(('key-2',), 'value', ([],)),
977
self.assertEqual(set([]), index.external_references(0))
979
def test__find_ancestors_one_page(self):
982
index = self.make_index(ref_lists=1, key_elements=1, nodes=[
983
(key1, 'value', ([key2],)),
984
(key2, 'value', ([],)),
988
search_keys = index._find_ancestors([key1], 0, parent_map, missing_keys)
989
self.assertEqual({key1: (key2,), key2: ()}, parent_map)
990
self.assertEqual(set(), missing_keys)
991
self.assertEqual(set(), search_keys)
993
def test__find_ancestors_one_page_w_missing(self):
997
index = self.make_index(ref_lists=1, key_elements=1, nodes=[
998
(key1, 'value', ([key2],)),
999
(key2, 'value', ([],)),
1002
missing_keys = set()
1003
search_keys = index._find_ancestors([key2, key3], 0, parent_map,
1005
self.assertEqual({key2: ()}, parent_map)
1006
# we know that key3 is missing because we read the page that it would
1008
self.assertEqual(set([key3]), missing_keys)
1009
self.assertEqual(set(), search_keys)
1011
def test__find_ancestors_one_parent_missing(self):
1015
index = self.make_index(ref_lists=1, key_elements=1, nodes=[
1016
(key1, 'value', ([key2],)),
1017
(key2, 'value', ([key3],)),
1020
missing_keys = set()
1021
search_keys = index._find_ancestors([key1], 0, parent_map,
1023
self.assertEqual({key1: (key2,), key2: (key3,)}, parent_map)
1024
self.assertEqual(set(), missing_keys)
1025
# all we know is that key3 wasn't present on the page we were reading
1026
# but if you look, the last key is key2 which comes before key3, so we
1027
# don't know whether key3 would land on this page or not.
1028
self.assertEqual(set([key3]), search_keys)
1029
search_keys = index._find_ancestors(search_keys, 0, parent_map,
1031
# passing it back in, we are sure it is 'missing'
1032
self.assertEqual({key1: (key2,), key2: (key3,)}, parent_map)
1033
self.assertEqual(set([key3]), missing_keys)
1034
self.assertEqual(set([]), search_keys)
1036
def test__find_ancestors_dont_search_known(self):
1040
index = self.make_index(ref_lists=1, key_elements=1, nodes=[
1041
(key1, 'value', ([key2],)),
1042
(key2, 'value', ([key3],)),
1043
(key3, 'value', ([],)),
1045
# We already know about key2, so we won't try to search for key3
1046
parent_map = {key2: (key3,)}
1047
missing_keys = set()
1048
search_keys = index._find_ancestors([key1], 0, parent_map,
1050
self.assertEqual({key1: (key2,), key2: (key3,)}, parent_map)
1051
self.assertEqual(set(), missing_keys)
1052
self.assertEqual(set(), search_keys)
1054
def test__find_ancestors_multiple_pages(self):
1055
# We need to use enough keys that we actually cause a split
1056
start_time = 1249671539
1057
email = "joebob@example.com"
1061
for i in xrange(400):
1062
rev_id = '%s-%s-%s' % (email,
1063
osutils.compact_date(start_time + i),
1064
osutils.rand_chars(16))
1066
nodes.append((rev_key, 'value', ref_lists))
1067
# We have a ref 'list' of length 1, with a list of parents, with 1
1068
# parent which is a key
1069
ref_lists = ((rev_key,),)
1070
rev_keys.append(rev_key)
1071
index = self.make_index(ref_lists=1, key_elements=1, nodes=nodes)
1072
self.assertEqual(400, index.key_count())
1073
self.assertEqual(3, len(index._row_offsets))
1074
nodes = dict(index._read_nodes([1, 2]))
1077
min_l2_key = l2.min_key
1078
max_l1_key = l1.max_key
1079
self.assertTrue(max_l1_key < min_l2_key)
1080
parents_min_l2_key = l2.keys[min_l2_key][1][0]
1081
self.assertEqual((l1.max_key,), parents_min_l2_key)
1082
# Now, whatever key we select that would fall on the second page,
1083
# should give us all the parents until the page break
1084
key_idx = rev_keys.index(min_l2_key)
1085
next_key = rev_keys[key_idx+1]
1086
# So now when we get the parent map, we should get the key we are
1087
# looking for, min_l2_key, and then a reference to go look for the
1088
# parent of that key
1090
missing_keys = set()
1091
search_keys = index._find_ancestors([next_key], 0, parent_map,
1093
self.assertEqual([min_l2_key, next_key], sorted(parent_map))
1094
self.assertEqual(set(), missing_keys)
1095
self.assertEqual(set([max_l1_key]), search_keys)
1097
search_keys = index._find_ancestors([max_l1_key], 0, parent_map,
1099
self.assertEqual(sorted(l1.keys), sorted(parent_map))
1100
self.assertEqual(set(), missing_keys)
1101
self.assertEqual(set(), search_keys)
1103
def test__find_ancestors_empty_index(self):
1104
index = self.make_index(ref_lists=1, key_elements=1, nodes=[])
1106
missing_keys = set()
1107
search_keys = index._find_ancestors([('one',), ('two',)], 0, parent_map,
1109
self.assertEqual(set(), search_keys)
1110
self.assertEqual({}, parent_map)
1111
self.assertEqual(set([('one',), ('two',)]), missing_keys)
1113
def test_supports_unlimited_cache(self):
1114
builder = btree_index.BTreeBuilder(reference_lists=0, key_elements=1)
1115
# We need enough nodes to cause a page split (so we have both an
1116
# internal node and a couple leaf nodes. 500 seems to be enough.)
1117
nodes = self.make_nodes(500, 1, 0)
1119
builder.add_node(*node)
1120
stream = builder.finish()
1121
trans = get_transport(self.get_url())
1122
size = trans.put_file('index', stream)
1123
index = btree_index.BTreeGraphIndex(trans, 'index', size)
1124
self.assertEqual(500, index.key_count())
1125
# We have an internal node
1126
self.assertEqual(2, len(index._row_lengths))
1127
# We have at least 2 leaf nodes
1128
self.assertTrue(index._row_lengths[-1] >= 2)
1129
self.assertIsInstance(index._leaf_node_cache, lru_cache.LRUCache)
1130
self.assertEqual(btree_index._NODE_CACHE_SIZE,
1131
index._leaf_node_cache._max_cache)
1132
self.assertIsInstance(index._internal_node_cache, fifo_cache.FIFOCache)
1133
self.assertEqual(100, index._internal_node_cache._max_cache)
1134
# No change if unlimited_cache=False is passed
1135
index = btree_index.BTreeGraphIndex(trans, 'index', size,
1136
unlimited_cache=False)
1137
self.assertIsInstance(index._leaf_node_cache, lru_cache.LRUCache)
1138
self.assertEqual(btree_index._NODE_CACHE_SIZE,
1139
index._leaf_node_cache._max_cache)
1140
self.assertIsInstance(index._internal_node_cache, fifo_cache.FIFOCache)
1141
self.assertEqual(100, index._internal_node_cache._max_cache)
1142
index = btree_index.BTreeGraphIndex(trans, 'index', size,
1143
unlimited_cache=True)
1144
self.assertIsInstance(index._leaf_node_cache, dict)
1145
self.assertIs(type(index._internal_node_cache), dict)
1146
# Exercise the lookup code
1147
entries = set(index.iter_entries([n[0] for n in nodes]))
1148
self.assertEqual(500, len(entries))
1151
class TestBTreeNodes(BTreeTestCase):
1154
BTreeTestCase.setUp(self)
1155
self.overrideAttr(btree_index, '_btree_serializer', self.parse_btree)
1157
def test_LeafNode_1_0(self):
1158
node_bytes = ("type=leaf\n"
1159
"0000000000000000000000000000000000000000\x00\x00value:0\n"
1160
"1111111111111111111111111111111111111111\x00\x00value:1\n"
1161
"2222222222222222222222222222222222222222\x00\x00value:2\n"
1162
"3333333333333333333333333333333333333333\x00\x00value:3\n"
1163
"4444444444444444444444444444444444444444\x00\x00value:4\n")
1164
node = btree_index._LeafNode(node_bytes, 1, 0)
1165
# We do direct access, or don't care about order, to leaf nodes most of
1166
# the time, so a dict is useful:
1168
("0000000000000000000000000000000000000000",): ("value:0", ()),
1169
("1111111111111111111111111111111111111111",): ("value:1", ()),
1170
("2222222222222222222222222222222222222222",): ("value:2", ()),
1171
("3333333333333333333333333333333333333333",): ("value:3", ()),
1172
("4444444444444444444444444444444444444444",): ("value:4", ()),
1175
def test_LeafNode_2_2(self):
1176
node_bytes = ("type=leaf\n"
1177
"00\x0000\x00\t00\x00ref00\x00value:0\n"
1178
"00\x0011\x0000\x00ref00\t00\x00ref00\r01\x00ref01\x00value:1\n"
1179
"11\x0033\x0011\x00ref22\t11\x00ref22\r11\x00ref22\x00value:3\n"
1180
"11\x0044\x00\t11\x00ref00\x00value:4\n"
1183
node = btree_index._LeafNode(node_bytes, 2, 2)
1184
# We do direct access, or don't care about order, to leaf nodes most of
1185
# the time, so a dict is useful:
1187
('00', '00'): ('value:0', ((), (('00', 'ref00'),))),
1188
('00', '11'): ('value:1',
1189
((('00', 'ref00'),), (('00', 'ref00'), ('01', 'ref01')))),
1190
('11', '33'): ('value:3',
1191
((('11', 'ref22'),), (('11', 'ref22'), ('11', 'ref22')))),
1192
('11', '44'): ('value:4', ((), (('11', 'ref00'),)))
1195
def test_InternalNode_1(self):
1196
node_bytes = ("type=internal\n"
1198
"0000000000000000000000000000000000000000\n"
1199
"1111111111111111111111111111111111111111\n"
1200
"2222222222222222222222222222222222222222\n"
1201
"3333333333333333333333333333333333333333\n"
1202
"4444444444444444444444444444444444444444\n"
1204
node = btree_index._InternalNode(node_bytes)
1205
# We want to bisect to find the right children from this node, so a
1206
# vector is most useful.
1208
("0000000000000000000000000000000000000000",),
1209
("1111111111111111111111111111111111111111",),
1210
("2222222222222222222222222222222222222222",),
1211
("3333333333333333333333333333333333333333",),
1212
("4444444444444444444444444444444444444444",),
1214
self.assertEqual(1, node.offset)
1216
def test_LeafNode_2_2(self):
1217
node_bytes = ("type=leaf\n"
1218
"00\x0000\x00\t00\x00ref00\x00value:0\n"
1219
"00\x0011\x0000\x00ref00\t00\x00ref00\r01\x00ref01\x00value:1\n"
1220
"11\x0033\x0011\x00ref22\t11\x00ref22\r11\x00ref22\x00value:3\n"
1221
"11\x0044\x00\t11\x00ref00\x00value:4\n"
1224
node = btree_index._LeafNode(node_bytes, 2, 2)
1225
# We do direct access, or don't care about order, to leaf nodes most of
1226
# the time, so a dict is useful:
1228
('00', '00'): ('value:0', ((), (('00', 'ref00'),))),
1229
('00', '11'): ('value:1',
1230
((('00', 'ref00'),), (('00', 'ref00'), ('01', 'ref01')))),
1231
('11', '33'): ('value:3',
1232
((('11', 'ref22'),), (('11', 'ref22'), ('11', 'ref22')))),
1233
('11', '44'): ('value:4', ((), (('11', 'ref00'),)))
1236
def assertFlattened(self, expected, key, value, refs):
1237
flat_key, flat_line = self.parse_btree._flatten_node(
1238
(None, key, value, refs), bool(refs))
1239
self.assertEqual('\x00'.join(key), flat_key)
1240
self.assertEqual(expected, flat_line)
1242
def test__flatten_node(self):
1243
self.assertFlattened('key\0\0value\n', ('key',), 'value', [])
1244
self.assertFlattened('key\0tuple\0\0value str\n',
1245
('key', 'tuple'), 'value str', [])
1246
self.assertFlattened('key\0tuple\0triple\0\0value str\n',
1247
('key', 'tuple', 'triple'), 'value str', [])
1248
self.assertFlattened('k\0t\0s\0ref\0value str\n',
1249
('k', 't', 's'), 'value str', [[('ref',)]])
1250
self.assertFlattened('key\0tuple\0ref\0key\0value str\n',
1251
('key', 'tuple'), 'value str', [[('ref', 'key')]])
1252
self.assertFlattened("00\x0000\x00\t00\x00ref00\x00value:0\n",
1253
('00', '00'), 'value:0', ((), (('00', 'ref00'),)))
1254
self.assertFlattened(
1255
"00\x0011\x0000\x00ref00\t00\x00ref00\r01\x00ref01\x00value:1\n",
1256
('00', '11'), 'value:1',
1257
((('00', 'ref00'),), (('00', 'ref00'), ('01', 'ref01'))))
1258
self.assertFlattened(
1259
"11\x0033\x0011\x00ref22\t11\x00ref22\r11\x00ref22\x00value:3\n",
1260
('11', '33'), 'value:3',
1261
((('11', 'ref22'),), (('11', 'ref22'), ('11', 'ref22'))))
1262
self.assertFlattened(
1263
"11\x0044\x00\t11\x00ref00\x00value:4\n",
1264
('11', '44'), 'value:4', ((), (('11', 'ref00'),)))
1267
class TestCompiledBtree(tests.TestCase):
1269
def test_exists(self):
1270
# This is just to let the user know if they don't have the feature
1272
self.requireFeature(compiled_btreeparser_feature)
1275
class TestMultiBisectRight(tests.TestCase):
1277
def assertMultiBisectRight(self, offsets, search_keys, fixed_keys):
1278
self.assertEqual(offsets,
1279
btree_index.BTreeGraphIndex._multi_bisect_right(
1280
search_keys, fixed_keys))
1282
def test_after(self):
1283
self.assertMultiBisectRight([(1, ['b'])], ['b'], ['a'])
1284
self.assertMultiBisectRight([(3, ['e', 'f', 'g'])],
1285
['e', 'f', 'g'], ['a', 'b', 'c'])
1287
def test_before(self):
1288
self.assertMultiBisectRight([(0, ['a'])], ['a'], ['b'])
1289
self.assertMultiBisectRight([(0, ['a', 'b', 'c', 'd'])],
1290
['a', 'b', 'c', 'd'], ['e', 'f', 'g'])
1292
def test_exact(self):
1293
self.assertMultiBisectRight([(1, ['a'])], ['a'], ['a'])
1294
self.assertMultiBisectRight([(1, ['a']), (2, ['b'])], ['a', 'b'], ['a', 'b'])
1295
self.assertMultiBisectRight([(1, ['a']), (3, ['c'])],
1296
['a', 'c'], ['a', 'b', 'c'])
1298
def test_inbetween(self):
1299
self.assertMultiBisectRight([(1, ['b'])], ['b'], ['a', 'c'])
1300
self.assertMultiBisectRight([(1, ['b', 'c', 'd']), (2, ['f', 'g'])],
1301
['b', 'c', 'd', 'f', 'g'], ['a', 'e', 'h'])
1303
def test_mixed(self):
1304
self.assertMultiBisectRight([(0, ['a', 'b']), (2, ['d', 'e']),
1306
['a', 'b', 'd', 'e', 'g', 'h'],
1307
['c', 'd', 'f', 'g'])
1310
class TestExpandOffsets(tests.TestCase):
1312
def make_index(self, size, recommended_pages=None):
1313
"""Make an index with a generic size.
1315
This doesn't actually create anything on disk, it just primes a
1316
BTreeGraphIndex with the recommended information.
1318
index = btree_index.BTreeGraphIndex(get_transport('memory:///'),
1319
'test-index', size=size)
1320
if recommended_pages is not None:
1321
index._recommended_pages = recommended_pages
1324
def set_cached_offsets(self, index, cached_offsets):
1325
"""Monkeypatch to give a canned answer for _get_offsets_for...()."""
1326
def _get_offsets_to_cached_pages():
1327
cached = set(cached_offsets)
1329
index._get_offsets_to_cached_pages = _get_offsets_to_cached_pages
1331
def prepare_index(self, index, node_ref_lists, key_length, key_count,
1332
row_lengths, cached_offsets):
1333
"""Setup the BTreeGraphIndex with some pre-canned information."""
1334
index.node_ref_lists = node_ref_lists
1335
index._key_length = key_length
1336
index._key_count = key_count
1337
index._row_lengths = row_lengths
1338
index._compute_row_offsets()
1339
index._root_node = btree_index._InternalNode('internal\noffset=0\n')
1340
self.set_cached_offsets(index, cached_offsets)
1342
def make_100_node_index(self):
1343
index = self.make_index(4096*100, 6)
1344
# Consider we've already made a single request at the middle
1345
self.prepare_index(index, node_ref_lists=0, key_length=1,
1346
key_count=1000, row_lengths=[1, 99],
1347
cached_offsets=[0, 50])
1350
def make_1000_node_index(self):
1351
index = self.make_index(4096*1000, 6)
1352
# Pretend we've already made a single request in the middle
1353
self.prepare_index(index, node_ref_lists=0, key_length=1,
1354
key_count=90000, row_lengths=[1, 9, 990],
1355
cached_offsets=[0, 5, 500])
1358
def assertNumPages(self, expected_pages, index, size):
1360
self.assertEqual(expected_pages, index._compute_total_pages_in_index())
1362
def assertExpandOffsets(self, expected, index, offsets):
1363
self.assertEqual(expected, index._expand_offsets(offsets),
1364
'We did not get the expected value after expanding'
1367
def test_default_recommended_pages(self):
1368
index = self.make_index(None)
1369
# local transport recommends 4096 byte reads, which is 1 page
1370
self.assertEqual(1, index._recommended_pages)
1372
def test__compute_total_pages_in_index(self):
1373
index = self.make_index(None)
1374
self.assertNumPages(1, index, 1024)
1375
self.assertNumPages(1, index, 4095)
1376
self.assertNumPages(1, index, 4096)
1377
self.assertNumPages(2, index, 4097)
1378
self.assertNumPages(2, index, 8192)
1379
self.assertNumPages(76, index, 4096*75 + 10)
1381
def test__find_layer_start_and_stop(self):
1382
index = self.make_1000_node_index()
1383
self.assertEqual((0, 1), index._find_layer_first_and_end(0))
1384
self.assertEqual((1, 10), index._find_layer_first_and_end(1))
1385
self.assertEqual((1, 10), index._find_layer_first_and_end(9))
1386
self.assertEqual((10, 1000), index._find_layer_first_and_end(10))
1387
self.assertEqual((10, 1000), index._find_layer_first_and_end(99))
1388
self.assertEqual((10, 1000), index._find_layer_first_and_end(999))
1390
def test_unknown_size(self):
1391
# We should not expand if we don't know the file size
1392
index = self.make_index(None, 10)
1393
self.assertExpandOffsets([0], index, [0])
1394
self.assertExpandOffsets([1, 4, 9], index, [1, 4, 9])
1396
def test_more_than_recommended(self):
1397
index = self.make_index(4096*100, 2)
1398
self.assertExpandOffsets([1, 10], index, [1, 10])
1399
self.assertExpandOffsets([1, 10, 20], index, [1, 10, 20])
1401
def test_read_all_from_root(self):
1402
index = self.make_index(4096*10, 20)
1403
self.assertExpandOffsets(range(10), index, [0])
1405
def test_read_all_when_cached(self):
1406
# We've read enough that we can grab all the rest in a single request
1407
index = self.make_index(4096*10, 5)
1408
self.prepare_index(index, node_ref_lists=0, key_length=1,
1409
key_count=1000, row_lengths=[1, 9],
1410
cached_offsets=[0, 1, 2, 5, 6])
1411
# It should fill the remaining nodes, regardless of the one requested
1412
self.assertExpandOffsets([3, 4, 7, 8, 9], index, [3])
1413
self.assertExpandOffsets([3, 4, 7, 8, 9], index, [8])
1414
self.assertExpandOffsets([3, 4, 7, 8, 9], index, [9])
1416
def test_no_root_node(self):
1417
index = self.make_index(4096*10, 5)
1418
self.assertExpandOffsets([0], index, [0])
1420
def test_include_neighbors(self):
1421
index = self.make_100_node_index()
1422
# We expand in both directions, until we have at least 'recommended'
1424
self.assertExpandOffsets([9, 10, 11, 12, 13, 14, 15], index, [12])
1425
self.assertExpandOffsets([88, 89, 90, 91, 92, 93, 94], index, [91])
1426
# If we hit an 'edge' we continue in the other direction
1427
self.assertExpandOffsets([1, 2, 3, 4, 5, 6], index, [2])
1428
self.assertExpandOffsets([94, 95, 96, 97, 98, 99], index, [98])
1430
# Requesting many nodes will expand all locations equally
1431
self.assertExpandOffsets([1, 2, 3, 80, 81, 82], index, [2, 81])
1432
self.assertExpandOffsets([1, 2, 3, 9, 10, 11, 80, 81, 82], index,
1435
def test_stop_at_cached(self):
1436
index = self.make_100_node_index()
1437
self.set_cached_offsets(index, [0, 10, 19])
1438
self.assertExpandOffsets([11, 12, 13, 14, 15, 16], index, [11])
1439
self.assertExpandOffsets([11, 12, 13, 14, 15, 16], index, [12])
1440
self.assertExpandOffsets([12, 13, 14, 15, 16, 17, 18], index, [15])
1441
self.assertExpandOffsets([13, 14, 15, 16, 17, 18], index, [16])
1442
self.assertExpandOffsets([13, 14, 15, 16, 17, 18], index, [17])
1443
self.assertExpandOffsets([13, 14, 15, 16, 17, 18], index, [18])
1445
def test_cannot_fully_expand(self):
1446
index = self.make_100_node_index()
1447
self.set_cached_offsets(index, [0, 10, 12])
1448
# We don't go into an endless loop if we are bound by cached nodes
1449
self.assertExpandOffsets([11], index, [11])
1451
def test_overlap(self):
1452
index = self.make_100_node_index()
1453
self.assertExpandOffsets([10, 11, 12, 13, 14, 15], index, [12, 13])
1454
self.assertExpandOffsets([10, 11, 12, 13, 14, 15], index, [11, 14])
1456
def test_stay_within_layer(self):
1457
index = self.make_1000_node_index()
1458
# When expanding a request, we won't read nodes from the next layer
1459
self.assertExpandOffsets([1, 2, 3, 4], index, [2])
1460
self.assertExpandOffsets([6, 7, 8, 9], index, [6])
1461
self.assertExpandOffsets([6, 7, 8, 9], index, [9])
1462
self.assertExpandOffsets([10, 11, 12, 13, 14, 15], index, [10])
1463
self.assertExpandOffsets([10, 11, 12, 13, 14, 15, 16], index, [13])
1465
self.set_cached_offsets(index, [0, 4, 12])
1466
self.assertExpandOffsets([5, 6, 7, 8, 9], index, [7])
1467
self.assertExpandOffsets([10, 11], index, [11])
1469
def test_small_requests_unexpanded(self):
1470
index = self.make_100_node_index()
1471
self.set_cached_offsets(index, [0])
1472
self.assertExpandOffsets([1], index, [1])
1473
self.assertExpandOffsets([50], index, [50])
1474
# If we request more than one node, then we'll expand
1475
self.assertExpandOffsets([49, 50, 51, 59, 60, 61], index, [50, 60])
1477
# The first pass does not expand
1478
index = self.make_1000_node_index()
1479
self.set_cached_offsets(index, [0])
1480
self.assertExpandOffsets([1], index, [1])
1481
self.set_cached_offsets(index, [0, 1])
1482
self.assertExpandOffsets([100], index, [100])
1483
self.set_cached_offsets(index, [0, 1, 100])
1484
# But after the first depth, we will expand
1485
self.assertExpandOffsets([2, 3, 4, 5, 6, 7], index, [2])
1486
self.assertExpandOffsets([2, 3, 4, 5, 6, 7], index, [4])
1487
self.set_cached_offsets(index, [0, 1, 2, 3, 4, 5, 6, 7, 100])
1488
self.assertExpandOffsets([102, 103, 104, 105, 106, 107, 108], index,
added
removed
bzrlib/tests/test_btree_index.py
