def test_for__multiple_rewards_in_is_valid_transaction_chain(three_block_blockchain):
reward_1 = SystemTransactions.transaction_reward_generation(Wallet()).convert_transaction_data_to_json()
reward_2 = SystemTransactions.transaction_reward_generation(Wallet()).convert_transaction_data_to_json()
three_block_blockchain.add_block([reward_1, reward_2])
with pytest.raises(Exception, match='There can only be one mining reward given per block'):
Blockchain.transaction_chain_is_valid(three_block_blockchain.chain)
def test_for_bad_transaction_in_is_valid_transaction_chain(three_block_blockchain):
bad_transaction = SystemTransactions(Wallet(), 'recipient', 1)
bad_transaction.transaction_input['signature'] = Wallet().signature_generation(
bad_transaction.transaction_output)
three_block_blockchain.add_block([bad_transaction.convert_transaction_data_to_json()])
with pytest.raises(Exception):
Blockchain.transaction_chain_is_valid(three_block_blockchain.chain)
def test_for_bad_historic_balance_in_is_valid_transaction_chain(three_block_blockchain):
wallet = Wallet()
bad_transaction = SystemTransactions(wallet, 'recipient', 1)
bad_transaction.transaction_output[wallet.address] = 9000
bad_transaction.transaction_input['amount'] = 9001
bad_transaction.transaction_input['signature'] = wallet.signature_generation(bad_transaction.transaction_output)
three_block_blockchain.add_block([bad_transaction.convert_transaction_data_to_json()])
with pytest.raises(Exception, match='has an invalid input amount'):
Blockchain.transaction_chain_is_valid(three_block_blockchain.chain)
def test_for_duplicate_transactions_in_is_valid_transaction_chain(three_block_blockchain):
transaction = SystemTransactions(Wallet(), 'recipient', 1).convert_transaction_data_to_json()
three_block_blockchain.add_block([transaction, transaction])
with pytest.raises(Exception, match='is not unique'):
Blockchain.transaction_chain_is_valid(three_block_blockchain.chain)
def test_for_valid_transaction_chain(three_block_blockchain):
Blockchain.transaction_chain_is_valid(three_block_blockchain.chain)
