forked from LBRYCommunity/lbry-sdk
154 lines
6 KiB
Python
154 lines
6 KiB
Python
import unittest
|
|
import tempfile
|
|
import shutil
|
|
from lbry.wallet.server.db.revertable import RevertableOpStack, RevertableDelete, RevertablePut, OpStackIntegrity
|
|
from lbry.wallet.server.db.prefixes import ClaimToTXOPrefixRow, HubDB
|
|
|
|
|
|
class TestRevertableOpStack(unittest.TestCase):
|
|
def setUp(self):
|
|
self.fake_db = {}
|
|
self.stack = RevertableOpStack(self.fake_db.get)
|
|
|
|
def tearDown(self) -> None:
|
|
self.stack.clear()
|
|
self.fake_db.clear()
|
|
|
|
def process_stack(self):
|
|
for op in self.stack:
|
|
if op.is_put:
|
|
self.fake_db[op.key] = op.value
|
|
else:
|
|
self.fake_db.pop(op.key)
|
|
self.stack.clear()
|
|
|
|
def update(self, key1: bytes, value1: bytes, key2: bytes, value2: bytes):
|
|
self.stack.append_op(RevertableDelete(key1, value1))
|
|
self.stack.append_op(RevertablePut(key2, value2))
|
|
|
|
def test_simplify(self):
|
|
key1 = ClaimToTXOPrefixRow.pack_key(b'\x01' * 20)
|
|
key2 = ClaimToTXOPrefixRow.pack_key(b'\x02' * 20)
|
|
key3 = ClaimToTXOPrefixRow.pack_key(b'\x03' * 20)
|
|
key4 = ClaimToTXOPrefixRow.pack_key(b'\x04' * 20)
|
|
|
|
val1 = ClaimToTXOPrefixRow.pack_value(1, 0, 1, 0, 1, False, 'derp')
|
|
val2 = ClaimToTXOPrefixRow.pack_value(1, 0, 1, 0, 1, False, 'oops')
|
|
val3 = ClaimToTXOPrefixRow.pack_value(1, 0, 1, 0, 1, False, 'other')
|
|
|
|
# check that we can't delete a non existent value
|
|
with self.assertRaises(OpStackIntegrity):
|
|
self.stack.append_op(RevertableDelete(key1, val1))
|
|
|
|
self.stack.append_op(RevertablePut(key1, val1))
|
|
self.assertEqual(1, len(self.stack))
|
|
self.stack.append_op(RevertableDelete(key1, val1))
|
|
self.assertEqual(0, len(self.stack))
|
|
|
|
self.stack.append_op(RevertablePut(key1, val1))
|
|
self.assertEqual(1, len(self.stack))
|
|
# try to delete the wrong value
|
|
with self.assertRaises(OpStackIntegrity):
|
|
self.stack.append_op(RevertableDelete(key2, val2))
|
|
|
|
self.stack.append_op(RevertableDelete(key1, val1))
|
|
self.assertEqual(0, len(self.stack))
|
|
self.stack.append_op(RevertablePut(key2, val3))
|
|
self.assertEqual(1, len(self.stack))
|
|
|
|
self.process_stack()
|
|
|
|
self.assertDictEqual({key2: val3}, self.fake_db)
|
|
|
|
# check that we can't put on top of the existing stored value
|
|
with self.assertRaises(OpStackIntegrity):
|
|
self.stack.append_op(RevertablePut(key2, val1))
|
|
|
|
self.assertEqual(0, len(self.stack))
|
|
self.stack.append_op(RevertableDelete(key2, val3))
|
|
self.assertEqual(1, len(self.stack))
|
|
self.stack.append_op(RevertablePut(key2, val3))
|
|
self.assertEqual(0, len(self.stack))
|
|
|
|
self.update(key2, val3, key2, val1)
|
|
self.assertEqual(2, len(self.stack))
|
|
|
|
self.process_stack()
|
|
self.assertDictEqual({key2: val1}, self.fake_db)
|
|
|
|
self.update(key2, val1, key2, val2)
|
|
self.assertEqual(2, len(self.stack))
|
|
self.update(key2, val2, key2, val3)
|
|
self.update(key2, val3, key2, val2)
|
|
self.update(key2, val2, key2, val3)
|
|
self.update(key2, val3, key2, val2)
|
|
with self.assertRaises(OpStackIntegrity):
|
|
self.update(key2, val3, key2, val2)
|
|
self.update(key2, val2, key2, val3)
|
|
self.assertEqual(2, len(self.stack))
|
|
self.stack.append_op(RevertableDelete(key2, val3))
|
|
self.process_stack()
|
|
self.assertDictEqual({}, self.fake_db)
|
|
|
|
self.stack.append_op(RevertablePut(key2, val3))
|
|
self.process_stack()
|
|
with self.assertRaises(OpStackIntegrity):
|
|
self.update(key2, val2, key2, val2)
|
|
self.update(key2, val3, key2, val2)
|
|
self.assertDictEqual({key2: val3}, self.fake_db)
|
|
undo = self.stack.get_undo_ops()
|
|
self.process_stack()
|
|
self.assertDictEqual({key2: val2}, self.fake_db)
|
|
self.stack.apply_packed_undo_ops(undo)
|
|
self.process_stack()
|
|
self.assertDictEqual({key2: val3}, self.fake_db)
|
|
|
|
|
|
class TestRevertablePrefixDB(unittest.TestCase):
|
|
def setUp(self):
|
|
self.tmp_dir = tempfile.mkdtemp()
|
|
self.db = HubDB(self.tmp_dir, cache_mb=1, max_open_files=32)
|
|
|
|
def tearDown(self) -> None:
|
|
self.db.close()
|
|
shutil.rmtree(self.tmp_dir)
|
|
|
|
def test_rollback(self):
|
|
name = 'derp'
|
|
claim_hash1 = 20 * b'\x00'
|
|
claim_hash2 = 20 * b'\x01'
|
|
claim_hash3 = 20 * b'\x02'
|
|
|
|
takeover_height = 10000000
|
|
|
|
self.assertIsNone(self.db.claim_takeover.get(name))
|
|
self.db.claim_takeover.stage_put((name,), (claim_hash1, takeover_height))
|
|
self.assertIsNone(self.db.claim_takeover.get(name))
|
|
self.assertEqual(10000000, self.db.claim_takeover.get_pending(name).height)
|
|
|
|
self.db.commit(10000000)
|
|
self.assertEqual(10000000, self.db.claim_takeover.get(name).height)
|
|
|
|
self.db.claim_takeover.stage_delete((name,), (claim_hash1, takeover_height))
|
|
self.db.claim_takeover.stage_put((name,), (claim_hash2, takeover_height + 1))
|
|
self.db.claim_takeover.stage_delete((name,), (claim_hash2, takeover_height + 1))
|
|
self.db.commit(10000001)
|
|
self.assertIsNone(self.db.claim_takeover.get(name))
|
|
self.db.claim_takeover.stage_put((name,), (claim_hash3, takeover_height + 2))
|
|
self.db.commit(10000002)
|
|
self.assertEqual(10000002, self.db.claim_takeover.get(name).height)
|
|
|
|
self.db.claim_takeover.stage_delete((name,), (claim_hash3, takeover_height + 2))
|
|
self.db.claim_takeover.stage_put((name,), (claim_hash2, takeover_height + 3))
|
|
self.db.commit(10000003)
|
|
self.assertEqual(10000003, self.db.claim_takeover.get(name).height)
|
|
|
|
self.db.rollback(10000003)
|
|
self.assertEqual(10000002, self.db.claim_takeover.get(name).height)
|
|
self.db.rollback(10000002)
|
|
self.assertIsNone(self.db.claim_takeover.get(name))
|
|
self.db.rollback(10000001)
|
|
self.assertEqual(10000000, self.db.claim_takeover.get(name).height)
|
|
self.db.rollback(10000000)
|
|
self.assertIsNone(self.db.claim_takeover.get(name))
|