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# -*- coding: utf-8 -*-
# Copyright 2018 New Vector Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from twisted.internet import defer
import random
import tests.unittest
import tests.utils
from gmpy2 import mpq as Fraction
from synapse.storage.chunk_ordered_table import ChunkDBOrderedListStore
class ChunkLinearizerStoreTestCase(tests.unittest.TestCase):
"""Tests to ensure that the ordering and rebalancing functions of
ChunkDBOrderedListStore work as expected.
"""
def __init__(self, *args, **kwargs):
super(ChunkLinearizerStoreTestCase, self).__init__(*args, **kwargs)
@defer.inlineCallbacks
def setUp(self):
hs = yield tests.utils.setup_test_homeserver()
self.store = hs.get_datastore()
self.clock = hs.get_clock()
@defer.inlineCallbacks
def test_simple_insert_fetch(self):
room_id = "foo_room1"
def test_txn(txn):
table = ChunkDBOrderedListStore(
txn, room_id, self.clock, 5, 100,
)
table.add_node("A")
table._insert_after("B", "A")
table._insert_before("C", "A")
table._insert_after("D", "A")
sql = """
SELECT chunk_id, numerator, denominator FROM chunk_linearized
WHERE room_id = ?
"""
txn.execute(sql, (room_id,))
ordered = sorted([(Fraction(n, d), r) for r, n, d in txn])
ordered = [c for _, c in ordered]
self.assertEqual(["C", "A", "D", "B"], ordered)
yield self.store.runInteraction("test", test_txn)
@defer.inlineCallbacks
def test_many_insert_fetch(self):
room_id = "foo_room2"
def test_txn(txn):
table = ChunkDBOrderedListStore(
txn, room_id, self.clock, 5, 100,
)
nodes = [(i, "node_%d" % (i,)) for i in xrange(1, 1000)]
expected = [n for _, n in nodes]
already_inserted = []
random.shuffle(nodes)
while nodes:
i, node_id = nodes.pop()
if not already_inserted:
table.add_node(node_id)
else:
for j, target_id in already_inserted:
if j > i:
break
if j < i:
table._insert_after(node_id, target_id)
else:
table._insert_before(node_id, target_id)
already_inserted.append((i, node_id))
already_inserted.sort()
sql = """
SELECT chunk_id, numerator, denominator FROM chunk_linearized
WHERE room_id = ?
"""
txn.execute(sql, (room_id,))
ordered = sorted([(Fraction(n, d), r) for r, n, d in txn])
ordered = [c for _, c in ordered]
self.assertEqual(expected, ordered)
yield self.store.runInteraction("test", test_txn)
@defer.inlineCallbacks
def test_prepend_and_append(self):
room_id = "foo_room3"
def test_txn(txn):
table = ChunkDBOrderedListStore(
txn, room_id, self.clock, 5, 1000,
)
table.add_node("a")
expected = ["a"]
for i in xrange(1, 1000):
node_id = "node_id_before_%d" % i
table._insert_before(node_id, expected[0])
expected.insert(0, node_id)
for i in xrange(1, 1000):
node_id = "node_id_after_%d" % i
table._insert_after(node_id, expected[-1])
expected.append(node_id)
sql = """
SELECT chunk_id, numerator, denominator FROM chunk_linearized
WHERE room_id = ?
"""
txn.execute(sql, (room_id,))
ordered = sorted([(Fraction(n, d), r) for r, n, d in txn])
ordered = [c for _, c in ordered]
self.assertEqual(expected, ordered)
yield self.store.runInteraction("test", test_txn)
@defer.inlineCallbacks
def test_worst_case(self):
room_id = "foo_room3"
def test_txn(txn):
table = ChunkDBOrderedListStore(
txn, room_id, self.clock, 5, 100,
)
table.add_node("a")
prev_node = "a"
expected_prefix = ["a"]
expected_suffix = []
for i in xrange(1, 100):
node_id = "node_id_%d" % i
if i % 2 == 0:
table._insert_before(node_id, prev_node)
expected_prefix.append(node_id)
else:
table._insert_after(node_id, prev_node)
expected_suffix.append(node_id)
prev_node = node_id
sql = """
SELECT chunk_id, numerator, denominator FROM chunk_linearized
WHERE room_id = ?
"""
txn.execute(sql, (room_id,))
ordered = sorted([(Fraction(n, d), r) for r, n, d in txn])
ordered = [c for _, c in ordered]
expected = expected_prefix + list(reversed(expected_suffix))
self.assertEqual(expected, ordered)
yield self.store.runInteraction("test", test_txn)
@defer.inlineCallbacks
def test_get_edges_to(self):
room_id = "foo_room4"
def test_txn(txn):
table = ChunkDBOrderedListStore(
txn, room_id, self.clock, 5, 100,
)
table.add_node("A")
table._insert_after("B", "A")
table._add_edge_to_graph("A", "B")
table._insert_before("C", "A")
table._add_edge_to_graph("C", "A")
nodes = table.get_nodes_with_edges_from("A")
self.assertEqual([n for _, n in nodes], ["B"])
nodes = table.get_nodes_with_edges_to("A")
self.assertEqual([n for _, n in nodes], ["C"])
yield self.store.runInteraction("test", test_txn)
@defer.inlineCallbacks
def test_get_next_and_prev(self):
room_id = "foo_room5"
def test_txn(txn):
table = ChunkDBOrderedListStore(
txn, room_id, self.clock, 5, 100,
)
table.add_node("A")
table._insert_after("B", "A")
table._insert_before("C", "A")
self.assertEqual(table.get_next("A"), "B")
self.assertEqual(table.get_prev("A"), "C")
yield self.store.runInteraction("test", test_txn)
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