struct one_sample_test *otp = UP_CAST (test, struct one_sample_test, parent);
struct runs_test *rt = UP_CAST (otp, struct runs_test, parent);
struct one_sample_test *otp = UP_CAST (test, struct one_sample_test, parent);
struct runs_test *rt = UP_CAST (otp, struct runs_test, parent);