def test_is_valid_block(last_block, block):
# last_block = Block.genesis()
# block = Block.mine_block(last_block, 'test-data')
Block.is_valid_block(last_block, block)
def test_is_valid_block(last_block, block):
Block.is_valid_block(last_block, block)
def test_is_valid_block_bad_proof_of_work(last_block, block):
block.hash = 'fff'
with pytest.raises(Exception,
match='proof of work requirement was not met'):
Block.is_valid_block(last_block, block)
def test_is_valid_block_bad_block_hash(last_block, block):
block.hash = '00000000000000000acabb'
with pytest.raises(Exception, match='The block hash must be correct'):
Block.is_valid_block(last_block, block)
def last_block():
return Block.genesis()
def test_slowly_mined_block():
last_block = Block.mine_block(Block.genesis(), 'foo')
time.sleep(MINE_RATE / SECONDS)
mined_block = Block.mine_block(last_block, 'bar')
assert mined_block.difficulty == last_block.difficulty - 1
def test_is_valid_block_bad_last_hash(last_block, block):
block.last_hash = 'evil_last_hash'
with pytest.raises(Exception, match='last_hash must be correct'):
Block.is_valid_block(last_block, block)
def test_quickly_mine_block():
last_block = Block.mine_block(Block.genesis(), 'foo')
mined_block = Block.mine_block(last_block, 'z1234')
assert last_block.difficulty - mined_block.difficulty == -1
def test_is_valid_block():
last_block = Block.genesis()
block = Block.mine_block(last_block, 'foo')
Block.is_valid_block(last_block, block)
def block(last_block):
return Block.mine_block(last_block, 'Test-data')
def test_slowly_mine_block():
last_block = Block.mine_block(Block.genesis(), 'foo')
sleep(MINE_RATE)
mined_block = Block.mine_block(last_block, 'z1234')
assert last_block.difficulty - mined_block.difficulty == +1
def add_block(self, data):
prev_block = self.chain[-1]
self.chain.append(Block.mine_block(prev_block, data))
def block(last_block):
return Block.mine_block(last_block, "test_data")
def test_quickly_mined_block():
last_block = Block.mine_block(Block.genesis(), "foo")
mined_block = Block.mine_block(last_block, "bar")
assert mined_block.difficulty == last_block.difficulty + 1
def test_is_valid_block_bad_block_hash(last_block, block):
block.hash = '000000000000000bbababababbabbabaab'
with pytest.raises(Exception, match="block hash must be correct"):
Block.is_valid_block(last_block, block)
def test_is_valid_bad_proof_of_work(last_block, block):
block.hash = 'fff'
with pytest.raises(Exception, match='The proof of work was not right'):
Block.is_valid_block(last_block, block)
def test_genesis():
genesis = Block.genesis()
assert isinstance(genesis, Block)
for key, value in GENESIS_DATA.items():
getattr(genesis, key) == value
def add_block(self, data):
block = Block.mine_block(self.chain[-1], data)
self.chain.append(block)
def test_is_valid_block(last_block, block):
block = Block.mine_block(last_block, 'test_data')
Block.is_valid_block(last_block, block)
def add_block(self, data):
last_block = self.chain[-1]
self.chain.append(Block.mine_block(last_block, data))
def test_is_valid_block_jumped_difficulty(last_block, block):
jumped_difficulty = 10
block.difficulty = jumped_difficulty
block.hash = f'{"0" * jumped_difficulty}111abc'
with pytest.raises(Exception, match='difficulty must only adjust by 1'):
Block.is_valid_block(last_block, block)
def add_block(self, data):
self.chain.append(Block.mine_block(self.chain[-1], data))
def test_quickly_mined_block():
last_block = Block.mine_block(Block.genesis(), 'foo')
mined_block = Block.mine_block(last_block, 'bar')
assert mined_block.difficulty == last_block.difficulty + 1
def block(last_block):
return Block.mine_block(last_block, "dummy data")
def block(last_block):
return Block.mine_block(last_block, 'test_data')
def test_is_valid_block(last_block, block):
# block.last_hash = "We're hacking you" # What would be the case if they tried to inject a branch or block. False hashes
Block.is_valid_block(last_block, block)
def test_is_valid_block_bad_last_hash(last_block, block):
block.last_hash = 'changing the last_block.hash'
# assert last_block.hash == block.last_hash
with pytest.raises(Exception, match='last_hash must be correct'):
Block.is_valid_block(last_block, block)
def test_is_valid_block_bad_last_hash(last_block, block):
block.last_hash = "Evil last hash"
with pytest.raises(Exception, match="last_hash must be correct"):
Block.is_valid_block(last_block, block)
def __init__(self):
self.chain = [Block.genesis()]
def add_block(self, data):
# instantiate block at the top of blockchain method
self.chain.append(Block.mine_block(self.chain[-1], data))
