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bigchaindb/tests/elections/test_election.py
Lev Berman 0c4d6ec906 Implement crash recovery for elections. (#2566)
1. Save pre-commit state in the beginning of end block. 
2. Provide an interface for custom elections to rollback on crash recovery. 
3. Simplify pre-commit management. 
4. Add crash recovery for updert-validator and chain migration elecitons.
2018-09-28 12:32:45 +02:00

265 lines
9.3 KiB
Python

import pytest
from tests.utils import generate_election, generate_validators
from bigchaindb.lib import Block
from bigchaindb.elections.election import Election
from bigchaindb.migrations.chain_migration_election import ChainMigrationElection
from bigchaindb.upsert_validator.validator_election import ValidatorElection
@pytest.mark.bdb
def test_process_block_concludes_all_elections(b):
validators = generate_validators([1] * 4)
b.store_validator_set(1, [v['storage'] for v in validators])
new_validator = generate_validators([1])[0]
public_key = validators[0]['public_key']
private_key = validators[0]['private_key']
voter_keys = [v['private_key'] for v in validators]
election, votes = generate_election(b,
ChainMigrationElection,
public_key, private_key,
{},
voter_keys)
txs = [election]
total_votes = votes
election, votes = generate_election(b,
ValidatorElection,
public_key, private_key,
new_validator['election'],
voter_keys)
txs += [election]
total_votes += votes
b.store_abci_chain(1, 'chain-X')
Election.process_block(b, 1, txs)
b.store_block(Block(height=1,
transactions=[tx.id for tx in txs],
app_hash='')._asdict())
b.store_bulk_transactions(txs)
Election.process_block(b, 2, total_votes)
validators = b.get_validators()
assert len(validators) == 5
assert new_validator['storage'] in validators
chain = b.get_latest_abci_chain()
assert chain
assert chain == {
'height': 2,
'is_synced': False,
'chain_id': 'chain-X-migrated-at-height-1',
}
for tx in txs:
assert b.get_election(tx.id)['is_concluded']
@pytest.mark.bdb
def test_process_block_approves_only_one_validator_update(b):
validators = generate_validators([1] * 4)
b.store_validator_set(1, [v['storage'] for v in validators])
new_validator = generate_validators([1])[0]
public_key = validators[0]['public_key']
private_key = validators[0]['private_key']
voter_keys = [v['private_key'] for v in validators]
election, votes = generate_election(b,
ValidatorElection,
public_key, private_key,
new_validator['election'],
voter_keys)
txs = [election]
total_votes = votes
another_validator = generate_validators([1])[0]
election, votes = generate_election(b,
ValidatorElection,
public_key, private_key,
another_validator['election'],
voter_keys)
txs += [election]
total_votes += votes
Election.process_block(b, 1, txs)
b.store_block(Block(height=1,
transactions=[tx.id for tx in txs],
app_hash='')._asdict())
b.store_bulk_transactions(txs)
Election.process_block(b, 2, total_votes)
validators = b.get_validators()
assert len(validators) == 5
assert new_validator['storage'] in validators
assert another_validator['storage'] not in validators
assert b.get_election(txs[0].id)['is_concluded']
assert not b.get_election(txs[1].id)['is_concluded']
@pytest.mark.bdb
def test_process_block_approves_after_pending_validator_update(b):
validators = generate_validators([1] * 4)
b.store_validator_set(1, [v['storage'] for v in validators])
new_validator = generate_validators([1])[0]
public_key = validators[0]['public_key']
private_key = validators[0]['private_key']
voter_keys = [v['private_key'] for v in validators]
election, votes = generate_election(b,
ValidatorElection,
public_key, private_key,
new_validator['election'],
voter_keys)
txs = [election]
total_votes = votes
another_validator = generate_validators([1])[0]
election, votes = generate_election(b,
ValidatorElection,
public_key, private_key,
another_validator['election'],
voter_keys)
txs += [election]
total_votes += votes
election, votes = generate_election(b,
ChainMigrationElection,
public_key, private_key,
{},
voter_keys)
txs += [election]
total_votes += votes
b.store_abci_chain(1, 'chain-X')
Election.process_block(b, 1, txs)
b.store_block(Block(height=1,
transactions=[tx.id for tx in txs],
app_hash='')._asdict())
b.store_bulk_transactions(txs)
Election.process_block(b, 2, total_votes)
validators = b.get_validators()
assert len(validators) == 5
assert new_validator['storage'] in validators
assert another_validator['storage'] not in validators
assert b.get_election(txs[0].id)['is_concluded']
assert not b.get_election(txs[1].id)['is_concluded']
assert b.get_election(txs[2].id)['is_concluded']
assert b.get_latest_abci_chain() == {'height': 2,
'chain_id': 'chain-X-migrated-at-height-1',
'is_synced': False}
@pytest.mark.bdb
def test_process_block_does_not_approve_after_validator_update(b):
validators = generate_validators([1] * 4)
b.store_validator_set(1, [v['storage'] for v in validators])
new_validator = generate_validators([1])[0]
public_key = validators[0]['public_key']
private_key = validators[0]['private_key']
voter_keys = [v['private_key'] for v in validators]
election, votes = generate_election(b,
ValidatorElection,
public_key, private_key,
new_validator['election'],
voter_keys)
txs = [election]
total_votes = votes
b.store_block(Block(height=1,
transactions=[tx.id for tx in txs],
app_hash='')._asdict())
Election.process_block(b, 1, txs)
b.store_bulk_transactions(txs)
second_election, second_votes = generate_election(b,
ChainMigrationElection,
public_key, private_key,
{},
voter_keys)
Election.process_block(b, 2, total_votes + [second_election])
b.store_block(Block(height=2,
transactions=[v.id for v in total_votes + [second_election]],
app_hash='')._asdict())
b.store_abci_chain(1, 'chain-X')
Election.process_block(b, 3, second_votes)
assert not b.get_election(second_election.id)['is_concluded']
assert b.get_latest_abci_chain() == {'height': 1,
'chain_id': 'chain-X',
'is_synced': True}
@pytest.mark.bdb
def test_process_block_applies_only_one_migration(b):
validators = generate_validators([1] * 4)
b.store_validator_set(1, [v['storage'] for v in validators])
public_key = validators[0]['public_key']
private_key = validators[0]['private_key']
voter_keys = [v['private_key'] for v in validators]
election, votes = generate_election(b,
ChainMigrationElection,
public_key, private_key,
{},
voter_keys)
txs = [election]
total_votes = votes
election, votes = generate_election(b,
ChainMigrationElection,
public_key, private_key,
{},
voter_keys)
txs += [election]
total_votes += votes
b.store_abci_chain(1, 'chain-X')
Election.process_block(b, 1, txs)
b.store_block(Block(height=1,
transactions=[tx.id for tx in txs],
app_hash='')._asdict())
b.store_bulk_transactions(txs)
Election.process_block(b, 1, total_votes)
chain = b.get_latest_abci_chain()
assert chain
assert chain == {
'height': 2,
'is_synced': False,
'chain_id': 'chain-X-migrated-at-height-1',
}
assert b.get_election(txs[0].id)['is_concluded']
assert not b.get_election(txs[1].id)['is_concluded']
def test_process_block_gracefully_handles_empty_block(b):
Election.process_block(b, 1, [])