def test_verify_valid_signature(self):
data = {"SHUcoin": "Is the best new cryptocurrency"}
wallet = Wallet()
signature = wallet.sign(data)
self.assertTrue(Wallet.verify(wallet.public_key, data, signature))
def test_contains_valid_transactions_bad_historic_balance(self):
wallet = Wallet()
bad_transaction = Transaction(wallet, "recipient", 1)
# Tamper with transaction, giving wallet a high amount
bad_transaction.output[wallet.address] = 1000
# Ensure input amount and transaction amount are still correct so validation doesn't fail at that point
bad_transaction.input["amount"] = 1001
# Re-sign
wallet.sign(bad_transaction.output)
self.blockchain.add_block([bad_transaction.serialize()])
with self.assertRaises(ContainsInvalidTransactionError):
Blockchain.contains_valid_transactions(self.blockchain.chain)
def test_verifyInvalidSignature():
data = {'foo': 'test data'}
wallet = Wallet()
signature = wallet.sign(data)
assert not Wallet.verify(Wallet().public_key, data, signature)