def test_valid_transaction(fx_blockchain: Blockchain):
fx_blockchain.new_transaction('0', 'test', 1)
transaction = fx_blockchain.current_transactions[0]
assert fx_blockchain.valid_transaction(transaction) is True
new = Transaction('sender', 'recipient', 10, transaction.timestamp - 1)
assert fx_blockchain.valid_transaction(new) is False
def test_last_block(fx_blockchain: Blockchain):
block = fx_blockchain.chain[0]
assert fx_blockchain.last_block == block
proof = fx_blockchain.pow(block.proof)
previous_hash = fx_blockchain.hash(block)
new_block = fx_blockchain.new_block(previous_hash=previous_hash,
proof=proof)
assert fx_blockchain.last_block == new_block
def test_valid_chain_invalid_hash(fx_blockchain: Blockchain,
previous_hash: str):
block = Block(2, time.time(), fx_blockchain.current_transactions, 10,
previous_hash)
chain = fx_blockchain.chain
chain.append(block)
assert not block.previous_hash == fx_blockchain.hash(chain[0])
assert fx_blockchain.valid_chain(fx_blockchain.chain) is False
def test_resolve_conflicts(fx_blockchain: Blockchain):
url = 'http://www.google.com'
fx_blockchain.register_node(url)
with Mocker() as m:
url = urllib.parse.urljoin(url, '/chain')
m.get(url, status_code=200, json={
'length': len(fx_blockchain.chain) + 1,
'chain': [dataclasses.asdict(b) for b in fx_blockchain.chain],
})
assert fx_blockchain.resolve_conflicts() is True
def test_resolve_conflicts_false(fx_blockchain: Blockchain, length: int,
chain: list):
url = 'http://www.google.com'
fx_blockchain.register_node(url)
with Mocker() as m:
url = urllib.parse.urljoin(url, '/chain')
m.get(url, status_code=200, json={
'length': length,
'chain': chain
})
assert fx_blockchain.resolve_conflicts() is False
def test_valid_chain_invalid_proof(fx_blockchain: Blockchain):
last_block = fx_blockchain.last_block
last_proof = last_block.proof
proof = fx_blockchain.pow(last_proof)
previous_hash = fx_blockchain.hash(last_block)
block = fx_blockchain.new_block(proof, previous_hash)
assert len(fx_blockchain.chain) == 2
assert block.previous_hash == fx_blockchain.hash(fx_blockchain.chain[0])
with unittest.mock.patch.object(Blockchain, 'valid_proof',
return_value=False):
assert fx_blockchain.valid_chain(fx_blockchain.chain) is False
def test_new_block(fx_blockchain: Blockchain,
proof: int,
previous_hash: typing.Union[str, int, None],
expected: typing.types):
with unittest.mock.patch.object(Blockchain, 'valid_block',
return_value=True):
block = fx_blockchain.new_block(proof, previous_hash)
assert isinstance(block.previous_hash, expected)
def test_block_chain():
blockchain = Blockchain()
block = blockchain.chain[0]
assert isinstance(block, Block)
assert block.index == 1
assert block.transactions == []
assert block.proof == 100
assert block.previous_hash == 1
assert blockchain.current_transactions == []
assert blockchain.nodes == set()
def test_new_transaction(fx_blockchain: Blockchain):
block = fx_blockchain.last_block
assert block.index == 1
assert fx_blockchain.current_transactions == []
result = fx_blockchain.new_transaction('0', 'test', 1)
assert result == 2
transaction = fx_blockchain.current_transactions[0]
assert isinstance(transaction, Transaction)
assert transaction.sender == '0'
assert transaction.recipient == 'test'
assert transaction.amount == 1
def fx_blockchain() -> Blockchain:
return Blockchain()
def test_valid_chain(fx_blockchain: Blockchain):
assert fx_blockchain.valid_chain(fx_blockchain.chain) is True
def test_register_node(fx_blockchain: Blockchain, address: str, expected: str):
assert fx_blockchain.nodes == set()
fx_blockchain.register_node(address)
assert fx_blockchain.nodes == {expected}
def test_valid_proof(fx_blockchain: Blockchain):
assert fx_blockchain.valid_proof(0, 0) in (True, False)
def test_hash(fx_blockchain: Blockchain):
result = fx_blockchain.hash(fx_blockchain.last_block)
assert isinstance(result, str)
def test_new_block_invalid_transaction(fx_blockchain: Blockchain):
r = raises(InvalidTransactionError)
m = unittest.mock.patch.object(Blockchain, 'valid_transaction',
return_value=False)
with r, m:
fx_blockchain.new_transaction('', '', 0)