def test_replace_chain_bad_chain(blockchain_three_blocks):
blockchain = Blockchain() #blockchain solo con genesis
blockchain_three_blocks.chain[
1].hash = 'evil-hash' #cambiando el hash a un bloque para que sea una cadena mala
with pytest.raises(Exception,
match='Cannot replace.Incoming chain is invalid'
): #mismo error que se pone en raise Exception
blockchain.replace_chain(blockchain_three_blocks.chain)
def test_replace_chain(blockchain_three_blocks):
blockchain = Blockchain() #blockchain solo con genesis
blockchain.replace_chain(
blockchain_three_blocks.chain
) #como blockchain_three_blocks es mas lago lo reemplaza
assert blockchain.chain == blockchain_three_blocks.chain #comprobando que paso la longitud