def test_is_valid_chain():
blockchain = Blockchain()
for i in range(3):
blockchain.add_block(i)
Blockchain.is_valid_chain(blockchain.chain)
def test_is_valid_chain(blockchain_three_blocks):
# blockchain = Blockchain()
# for i in range(3):
# blockchain.add_block(i)
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_is_valid_chain(blockchain_three_blocks):
with pytest.raises(Exception, match='chain must have block'):
Blockchain.is_valid_chain([])
blockchain_three_blocks.chain[1].hash = 'evil_hash'
with pytest.raises(Exception, match='must be formatted correctly'):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_is_valid_chain_bad_genesis():
blockchain = Blockchain()
for i in range(3):
blockchain.add_block(i)
blockchain.chain[0].hash = 'bad-hash'
with pytest.raises(Exception, match='The genesis block must be valid'):
Blockchain.is_valid_chain(blockchain.chain)
def test_is_valid_chain_invalid_genesis(blockchain_with_blocks):
blockchain_with_blocks.chain[0].hash = 3000
with pytest.raises(Exception, match="genesis block is invalid"):
Blockchain.is_valid_chain(blockchain_with_blocks.chain)
def test_is_valid_chain(blockchain_with_blocks):
Blockchain.is_valid_chain(blockchain_with_blocks.chain)
def test_is_valid_chain_bad_genesis(blockchain_four_blocks):
blockchain_four_blocks.chain[0].hash = "bad_hash"
with pytest.raises(Exception, match = "Invalid genesis block"):
Blockchain.is_valid_chain(blockchain_four_blocks.chain)
def test_is_valid_chain(blockchain_three_blocks):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_is_valid_chain(populated_blockchain):
Blockchain.is_valid_chain(populated_blockchain.chain)
def test_is_valid_chain_bad_genesis(blockchain_three_blocks):
blockchain_three_blocks.chain[0].hash = 'evil_hash'
with pytest.raises(Exception, match='The genesis block is not valid'):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_is_valid_chain_bad_genesis(blockchain_three_blocks):
blockchain_three_blocks.chain[0].data = 'evil'
with pytest.raises(Exception,
match='chain must start with the genesis block'):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_is_valid_chain_bad_gensis(blockchain_five_blocks):
blockchain_five_blocks.chain[0].hash = 'evil hash haha'
# Because we expect an exception
with pytest.raises(Exception, match="genesis block must be valid"):
Blockchain.is_valid_chain(blockchain_five_blocks.chain)
def test_is_valid_chain(blockchain_five_blocks):
# Tests code implicitly by virtue of no exception
Blockchain.is_valid_chain(blockchain_five_blocks.chain)
def test_is_valid_chain_bad_genesis(blockchain_init):
blockchain_init.chain[0].hash = "evil_hash"
with pytest.raises(Exception, match="The genesis block must be valid."):
Blockchain.is_valid_chain(blockchain_init.chain)
def test_is_valid_chain(blockchain_init):
Blockchain.is_valid_chain(blockchain_init.chain)
def test_is_valid_chain(blockchain):
Blockchain.is_valid_chain(blockchain.chain)
def test_is_valid_chain_bad_genesis(blockchain):
blockchain.chain[0].hash = 'evil_hash'
with raises(Exception, match='Invalid genesis block'):
Blockchain.is_valid_chain(blockchain.chain)
def test_is_valid_chain_bad_genesis(blockchain_three_blocks):
blockchain_three_blocks.chain[0].data = 'evil_data'
with pytest.raises(Exception, match='The genesis block must be valid'):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_replace_chain_bad_chain(blockchain_three_blocks):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_is_valid_chain_bad_genesis(blockchain_three_blocks):
blockchain_three_blocks.chain[0].hash = 'evil_hash'
with pytest.raises(Exception, match='The chain must start with genesis'):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_valid_transaction_chain(blockchain_three_blocks):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_is_valid_chain_bad_genesis(blockchain_three_blocks):
blockchain_three_blocks.chain[0].hash = 'evil_hash'
#Below code allows to catch exceptions
with pytest.raises(Exception, match='The Genesis block must be valid'):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_is_valid_chain_bad_genesis(populated_blockchain):
populated_blockchain.chain[0].hash = 'bad_hash'
with pytest.raises(Exception, match="The Genesis block is not valid!"):
Blockchain.is_valid_chain(populated_blockchain.chain)
def test_is_valid_chain_bad_genesis(blockchain_three_blocks):
blockchain_three_blocks.chain[0].hash = 'bas_hash'
with pytest.raises(Exception, match='The genesis block must be valid.'):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_is_valid_chain_bad_genesis(blockchain_three_blocks):
blockchain_three_blocks.chain[0].block_hash = 'evil_hash'
with pytest.raises(Exception, match="genesis block must be valid"):
Blockchain.is_valid_chain(blockchain_three_blocks.chain)
def test_is_valid_chain(blockchain_four_blocks):
Blockchain.is_valid_chain(blockchain_four_blocks.chain)