def test_blocks_ids_should_increase_one_by_one():
chain = Blockchain()
block_id_one = Block()
block_id_two = Block()
chain.add_block(block_id_one)
chain.add_block(block_id_two)
assert block_id_one.id == 1
assert block_id_two.id == 2
def test_each_block_s_previous_hash_property_should_be_previous_block_s_hash():
chain = Blockchain()
block_id_zero = Block()
block_id_one = Block()
block_id_two = Block()
chain.add_block(block_id_zero)
chain.add_block(block_id_one)
chain.add_block(block_id_two)
assert block_id_one.previous_hash == block_id_zero.hash
assert block_id_two.previous_hash == block_id_one.hash
def test_block_hash_should_be_created_by_id_prvhash_and_nonce():
block = Block()
block.id = 100
block.previous_hash = 100
block.data = {'name': 'Onur', 'surname': 'Aykaç'}
block.nonce = 100
block.calculate_hash()
assert block.hash == "1477b8d1c6b66c77015684ecaae6b23d6373bcab23d067f3926cf8cdd6761b07"
def test_any_other_node_found_correct_hash_then_mining_should_be_stopped():
from dokuztas.blockchain import Blockchain, PendingBlock, Block
node = NodeComponent(miner=True)
node.chain = Blockchain(difficulty=10)
def adds_genesis():
genesis = Block(id=0,
blockhash=0,
previous_hash=0,
nonce=0,
merkleroot=0,
data=['genesis'])
node.chain.blocks.append(genesis)
genesis_patcher = patch('dokuztas.node.NodeComponent.create_genesis_chain',
side_effect=adds_genesis)
genesis_patcher.start()
node.create_genesis_chain()
genesis_patcher.stop()
pending_block = PendingBlock()
pending_block.add_txs(['a', 'b', 'c'])
node.pending_blocks.append(pending_block)
node.mine()
block_to_add = Block(id=123,
previous_hash=0,
nonce=123,
merkleroot=123,
blockhash=111,
data=['a', 'b', 'c'])
node.block_added(block_to_add)
assert node.chain.blocks[1].blockhash == 111
assert len(node.chain.blocks) == 2
def test_while_mining_new_txs_can_be_adding(node):
from dokuztas.blockchain import Block
assert len(node.pending_txs) == 1
# Mevcut mining'i durdurmak için.
block_to_add = Block(id=123, previous_hash=0, nonce=123, merkleroot=123, blockhash=111, data=['a', 'b', 'c'])
node.block_added(block_to_add)
def adds_genesis():
genesis = Block(id=0,
blockhash=0,
previous_hash=0,
nonce=0,
merkleroot=0,
data=['genesis'])
node.chain.blocks.append(genesis)
def test_if_the_blocks_are_not_changed_then_chain_should_be_a_valid_chain():
chain = Blockchain()
block_id_zero = Block()
block_id_one = Block()
block_id_two = Block()
chain.add_block(block_id_zero)
first_validation = chain.validate()
assert first_validation == True
chain.add_block(block_id_one)
second_validation = chain.validate()
assert second_validation == True
chain.add_block(block_id_two)
third_validation = chain.validate()
assert third_validation == True
def test_if_a_block_is_changed_then_chain_should_not_be_a_valid_chain():
chain = Blockchain()
block_id_zero = Block()
block_id_one = Block()
block_id_two = Block()
chain.add_block(block_id_zero)
chain.add_block(block_id_one)
chain.add_block(block_id_two)
block_id_one.data = {'hacked'}
block_id_one.calculate_hash()
validation = chain.validate()
assert validation == False
def test_any_other_node_found_correct_hash_then_mining_should_be_stopped():
from dokuztas.blockchain import Blockchain, PendingBlock, Block
node = NodeComponent(miner=True)
node.chain = Blockchain(difficulty=10)
node.chain._generate_genesis()
pending_block = PendingBlock()
pending_block.add_txs(['a', 'b', 'c'])
node.pending_blocks.append(pending_block)
node.mine()
block_to_add = Block(id=123,
previous_hash=0,
nonce=123,
merkleroot=123,
blockhash=111,
data=['a', 'b', 'c'])
node.block_added(block_to_add)
assert node.chain.blocks[1].blockhash == 111
assert len(node.chain.blocks) == 2
def test_block_data_should_be_dict():
data = {'name': 'Onur', 'surname': 'Aykaç'}
block = Block(data=data)
assert isinstance(block.data, dict)
def test_genesis_block_s_previous_block_hash_should_be_assigned_zero():
chain = Blockchain()
genesis_block = Block()
chain.add_block(genesis_block)
assert chain.blocks[0].previous_hash == 0
def test_when_genesis_block_is_added_then_genesis_block_id_should_be_assigned_zero(
):
chain = Blockchain()
genesis_block = Block()
chain.add_block(genesis_block)
assert chain.blocks[0].id == 0