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# Copyright (C) 2008 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Tests for maps built on a CHK versionedfiles facility."""
from bzrlib.chk_map import CHKMap, RootNode, ValueNode
from bzrlib.tests import TestCaseWithTransport
class TestDumbMap(TestCaseWithTransport):
def get_chk_bytes(self):
# The eassiest way to get a CHK store is a development3 repository and
# then work with the chk_bytes attribute directly.
repo = self.make_repository(".", format="development3")
repo.lock_write()
self.addCleanup(repo.unlock)
repo.start_write_group()
self.addCleanup(repo.abort_write_group)
return repo.chk_bytes
def read_bytes(self, chk_bytes, key):
stream = chk_bytes.get_record_stream([key], 'unordered', True)
return stream.next().get_bytes_as("fulltext")
def assertHasABMap(self, chk_bytes):
root_key = ('sha1:674c986f86eacc7d9e4fbee45eda625e5689f9a4',)
self.assertEqual(
"chkroot:\n1\na\x00sha1:cb29f32e561a1b7f862c38ccfd6bc7c7d892f04b\n",
self.read_bytes(chk_bytes, root_key))
self.assertEqual(
"chkvalue:\nb",
self.read_bytes(chk_bytes,
("sha1:cb29f32e561a1b7f862c38ccfd6bc7c7d892f04b",)))
def assertHasEmptyMap(self, chk_bytes):
root_key = ('sha1:8e13ef930ff710425830ffd5077146b259b49534',)
self.assertEqual("chkroot:\n0\n", self.read_bytes(chk_bytes, root_key))
def _get_map(self, a_dict):
chk_bytes = self.get_chk_bytes()
root_key = CHKMap.from_dict(chk_bytes, a_dict)
chkmap = CHKMap(chk_bytes, root_key)
return chkmap
def test_from_dict_empty(self):
chk_bytes = self.get_chk_bytes()
root_key = CHKMap.from_dict(chk_bytes, {})
self.assertEqual(('sha1:8e13ef930ff710425830ffd5077146b259b49534',),
root_key)
self.assertHasEmptyMap(chk_bytes)
def test_from_dict_ab(self):
chk_bytes = self.get_chk_bytes()
root_key = CHKMap.from_dict(chk_bytes, {"a":"b"})
self.assertEqual(('sha1:674c986f86eacc7d9e4fbee45eda625e5689f9a4',),
root_key)
self.assertHasABMap(chk_bytes)
def test_apply_empty_ab(self):
# applying a delta (None, "a", "b") to an empty chkmap generates the
# same map as from_dict_ab.
chk_bytes = self.get_chk_bytes()
root_key = CHKMap.from_dict(chk_bytes, {})
chkmap = CHKMap(chk_bytes, root_key)
new_root = chkmap.apply_delta([(None, "a", "b")])
self.assertEqual(('sha1:674c986f86eacc7d9e4fbee45eda625e5689f9a4',),
new_root)
self.assertHasABMap(chk_bytes)
# The update should have left us with an in memory root node, with an
# updated key.
self.assertEqual(new_root, chkmap._root_node._key)
def test_apply_ab_empty(self):
# applying a delta ("a", None, None) to an empty chkmap generates the
# same map as from_dict_ab.
chk_bytes = self.get_chk_bytes()
root_key = CHKMap.from_dict(chk_bytes, {"a":"b"})
chkmap = CHKMap(chk_bytes, root_key)
new_root = chkmap.apply_delta([("a", None, None)])
self.assertEqual(('sha1:8e13ef930ff710425830ffd5077146b259b49534',),
new_root)
self.assertHasEmptyMap(chk_bytes)
# The update should have left us with an in memory root node, with an
# updated key.
self.assertEqual(new_root, chkmap._root_node._key)
def test_iteritems_empty(self):
chk_bytes = self.get_chk_bytes()
root_key = CHKMap.from_dict(chk_bytes, {})
chkmap = CHKMap(chk_bytes, root_key)
self.assertEqual([], list(chkmap.iteritems()))
def test_iteritems_two_items(self):
chk_bytes = self.get_chk_bytes()
root_key = CHKMap.from_dict(chk_bytes,
{"a":"content here", "b":"more content"})
chkmap = CHKMap(chk_bytes, root_key)
self.assertEqual([("a", "content here"), ("b", "more content")],
sorted(list(chkmap.iteritems())))
def test_iteritems_selected_one_of_two_items(self):
chkmap = self._get_map( {"a":"content here", "b":"more content"})
self.assertEqual([("a", "content here")],
sorted(list(chkmap.iteritems(["a"]))))
def test___len__empty(self):
chkmap = self._get_map({})
self.assertEqual(0, len(chkmap))
def test___len__2(self):
chkmap = self._get_map( {"foo":"bar", "gam":"quux"})
self.assertEqual(2, len(chkmap))
class TestRootNode(TestCaseWithTransport):
def test_serialise_empty(self):
node = RootNode()
bytes = node.serialise()
self.assertEqual("chkroot:\n0\n", bytes)
def test_add_child_resets_key(self):
node = RootNode()
node._key = ("something",)
node.add_child("c", ("sha1:1234",))
self.assertEqual(None, node._key)
def test_add_child_increases_len(self):
node = RootNode()
node._key = ("something",)
node.add_child("c", ("sha1:1234",))
self.assertEqual(1, len(node))
def test_remove_child_decreases_len(self):
node = RootNode()
node.add_child("c", ("sha1:1234",))
node._key = ("something",)
node.remove_child("c")
self.assertEqual(0, len(node))
def test_remove_child_removes_child(self):
node = RootNode()
node.add_child("a", ("sha1:4321",))
node.add_child("c", ("sha1:1234",))
node._key = ("something",)
node.remove_child("a")
self.assertEqual({"c":("sha1:1234",)}, node._nodes)
def test_remove_child_resets_key(self):
node = RootNode()
node.add_child("c", ("sha1:1234",))
node._key = ("something",)
node.remove_child("c")
self.assertEqual(None, node._key)
def test_deserialise(self):
# deserialising from a bytestring & key sets the nodes and the known
# key.
node = RootNode()
node.deserialise("chkroot:\n1\nc\x00sha1:1234\n", ("foo",))
self.assertEqual({"c": ("sha1:1234",)}, node._nodes)
self.assertEqual(("foo",), node._key)
self.assertEqual(1, len(node))
def test_serialise_with_child(self):
node = RootNode()
node.add_child("c", ("sha1:1234",))
bytes = node.serialise()
self.assertEqual("chkroot:\n1\nc\x00sha1:1234\n", bytes)
class TestValueNode(TestCaseWithTransport):
def test_deserialise(self):
node = ValueNode.deserialise("chkvalue:\nfoo bar baz\n")
self.assertEqual("foo bar baz\n", node.value)
def test_serialise(self):
node = ValueNode("b")
bytes = node.serialise()
self.assertEqual("chkvalue:\nb", bytes)
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