def test_blockchain_wrong(blockchain : Blockchain):
blockchain.chain[-2].miner_pub_key = b"zzz"
barray = BlockArray(blockchain)
assert not barray.is_correct()
assert not blockchain.substitute(barray)
with pytest.raises(Exception) as excinfo:
blockchain.add(blockchain.chain[0])
assert str(excinfo.value) == 'Blockchain invalid'
def test_change_blockchain(blockchain : Blockchain):
block = transaction_to_block(transactions[4], 11, blockchain)
blockArray = BlockArray(blockchain)
blockArray.add(block)
previous_len = len(blockchain)
assert blockchain.substitute(blockArray)
assert len(blockchain) == len(blockArray)
assert len(blockchain) == previous_len + 1
def test_receive_blockchain(client, blockchain):
blockArray = BlockArray(blockchain)
blockchain_bytes = b64encode(pickle.dumps(blockArray))
res = client.post(url_for('receive_blockchain'), \
data=blockchain_bytes)
assert res.status_code == 200
res = client.get('blockchain')
blockchain = res.json
assert len(blockchain['blocks']) == 3
def test_block_array_receive_blocks(blockchain : Blockchain):
blockArray = BlockArray(blockchain.chain)
assert len(blockArray.chain) == 3
def test_dont_change_blockchain(blockchain : Blockchain):
blockArray = BlockArray(blockchain)
previous_len = len(blockchain)
assert blockchain.substitute(blockArray)
assert len(blockchain) == previous_len
def test_blockchain_not_mined(blockchain : Blockchain):
block = blockchain.chain.pop()
new_blockchain = BlockArray(blockchain).to_blockchain()
if not new_blockchain: return
new_blockchain.difficult = 5
assert not new_blockchain.is_new_block_OK(block)
def test_blockchain_right(blockchain : Blockchain):
assert BlockArray(blockchain).is_correct()
def test_blockchain_small(blockchain : Blockchain):
small_blockchain = Blockchain()
small_blockchain.copy(blockchain)
small_blockchain.chain.pop()
assert not blockchain.substitute(BlockArray(small_blockchain))
def send_blockchain():
for server in servers:
blockArray = BlockArray(blockchain)
blockchain_bytes = b64encode(pickle.dumps(blockArray))
requests.post(f'http://{server}/receiveblockchain', \
data=blockchain_bytes)