def test_is_valid_chain_bad_genesis(blockchain_three_blocks): blockchain_three_blocks.chain[0].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_three_blocks): # Compare two different instances of the same class in python, it will results as False. # E.g foo = Block.genesis(), bar = Block.genesis(), foo == bar => False Blockchain.is_valid_chain(blockchain_three_blocks.chain)