Tests for twisted.conch.scripts.ckeygen.
| Function | makeGetpass | Return a callable to patch getpass.getpass.  Yields a 
passphrase each time called. Use case is to provide an old, then new 
passphrase(s) as if requested interactively. | 
| Class | KeyGenTests | Tests for various functions used to implement the ckeygen script. | 
Return a callable to patch getpass.getpass.  Yields a 
passphrase each time called. Use case is to provide an old, then new 
passphrase(s) as if requested interactively.
| Parameters | passphrases | The list of passphrases returned, one per each call. | 
| Returns | A callable to patch getpass.getpass. | |