'Assert a check_id was performed, and resulted in no anomalies.'

def assertCheckUndetected(self, check_id, results):

    if (not isinstance(results, collections.Mapping)):
        self.fail(('Invalid    arg,    %s    should    be    dict-like.\n' % type(results)))
    if (check_id not in results):
        self.fail(('Check    %s    was    not    performed.\n' % check_id))
    if results.get(check_id):
        self.fail(('Check    %s    unexpectedly    produced    an    anomaly.\nGot:    %s\n' % (check_id, results.get(check_id).anomaly)))
