def test_constructor_not_genesis_previous_hash(self):
with self.assertRaises(Exception):
Block(timestamp, transaction, index, genesis_previous_hash)
def test_constructor_transaction_list_with_null(self):
with self.assertRaises(Exception):
Block(timestamp, [transaction, None], index, previous_hash)
def test_constructor_incorrect_transaction(self):
with self.assertRaises(Exception):
Block(timestamp, incorrect_transaction, index, previous_hash)
def test_constructor_null_transaction(self):
with self.assertRaises(Exception):
Block(timestamp, None, index, previous_hash)
def test_constructor_incorrect_argument_transaction(self):
for argument in vector_type_checks:
with self.assertRaises(Exception):
Block(timestamp, argument, index, previous_hash)
def test_constructor_correct(self):
block = Block(timestamp, transaction, index, previous_hash)
self.assertEqual(block.timestamp, timestamp)
self.assertEqual(block.transactions, transaction)
self.assertEqual(block.index, index)
self.assertEqual(block.previousHash, previous_hash)
def test_constructor_correct_genesis_block(self):
block = Block(timestamp, transaction, 0, genesis_previous_hash)
self.assertEqual(block.timestamp, timestamp)
self.assertEqual(block.transactions, transaction)
self.assertEqual(block.index, 0)
self.assertEqual(block.previousHash, genesis_previous_hash)
def test_integrity_modified_previous_hash(self):
block = Block(timestamp, transaction, index, previous_hash)
block.mine_block(2)
block.previousHash = "wrongHash"
self.assertNotEqual(block.currentHash, block.calculate_hash())
def test_integrity_modified_nonce(self):
block = Block(timestamp, transaction, index, previous_hash)
block.mine_block(2)
block.nonce = -1 # Pray it doesnt it the correct nonce...
self.assertNotEqual(block.currentHash, block.calculate_hash())
def test_integrity_modified_transaction_list_null(self):
block = Block(timestamp, [transaction, Transaction(from_address, to_address, amount, node_identifier)], index, previous_hash)
block.mine_block(2)
block.transactions = None
self.assertNotEqual(block.currentHash, block.calculate_hash())
def test_integrity_modified_timestamp(self):
block = Block(timestamp, transaction, index, previous_hash)
block.mine_block(2)
block.timestamp = datetime.now()
self.assertNotEqual(block.currentHash, block.calculate_hash())
def test_transaction_check_invalid_transaction_list(self):
block = Block(timestamp, transaction, index, previous_hash)
block.transactions = [transaction, incorrect_transaction]
self.assertFalse(block.has_valid_transactions(block.transactions))
def test_transaction_check_correct_list(self):
block = Block(timestamp, [transaction, transaction], index, previous_hash)
self.assertTrue(block.has_valid_transactions(block.transactions))
def test_mining_correct_difficulty(self):
block = Block(timestamp, transaction, index, previous_hash)
block.mine_block(difficulty)
self.assertEqual(block.currentHash[0:difficulty], "".join((["0"] * difficulty)))
