<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def _validate_cert_path(name):
    '''
    Ensure that the certificate path, as determind from user input, is valid.
    '''
    cmd = r"Test-Path -Path '{0}'".format(name)

    if not ast.literal_eval(_cmd_run(cmd=cmd)):
        raise SaltInvocationError(r"Invalid path specified: {0}".format(name))