def test_for_bad_genesis_in_valid_chain(three_block_blockchain): three_block_blockchain.chain[0].hash = 'bad_hash' with pytest.raises(Exception, match = 'Genesis Block Must Be Valid'): Blockchain.chain_is_valid(three_block_blockchain.chain)#
def test_if_chain_is_valid(three_block_blockchain): Blockchain.chain_is_valid(three_block_blockchain.chain)