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- from .utils import *
- import traceback
- errors = 0
- def trans_test(fn):
- """ Immediately runs a test that requires a blockchain, and a transaction with private key in that blockchain. """
- def wrapper():
- gen_chain = Blockchain([GENESIS_BLOCK])
- assert gen_chain.verify_all()
- key = Signing.generate_private_key()
- reward_trans = Transaction([], [TransactionTarget(key, gen_chain.compute_blockreward(gen_chain.head))])
- chain = extend_blockchain(gen_chain, [reward_trans])
- try:
- fn(chain, reward_trans)
- except:
- global errors
- errors += 1
- traceback.print_exc()
- return wrapper
- @trans_test
- def test_double_spend1(chain, reward_trans):
- trans1 = new_trans(reward_trans)
- chain = extend_blockchain(chain, [trans1])
- # spending the coin in reward_trans again must fail:
- extend_blockchain(chain, [trans1], verify_res=False)
- # spending the output of trans1 must work:
- assert chain.is_coin_still_valid(trans_as_input(trans1))
- @trans_test
- def test_double_spend2(chain, reward_trans):
- trans1 = new_trans(reward_trans)
- trans2 = new_trans(reward_trans)
- extend_blockchain(chain, [trans1, trans2], verify_res=False)
- @trans_test
- def test_double_spend3(chain, reward_trans):
- trans1 = Transaction([trans_as_input(reward_trans), trans_as_input(reward_trans)], [])
- key = reward_trans.targets[0].recipient_pk
- trans1.sign([key, key])
- extend_blockchain(chain, [trans1], verify_res=False)
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