tg.t.Helper()
	if !tg.ran {
		tg.t.Fatal("internal testsuite error: stdout called before run")
	}
	return tg.stdout.String()
}

// getStderr returns standard error of the testgo run as a string.
func (tg *testgoData) getStderr() string {
	tg.t.Helper()
	if !tg.ran {
		tg.t.Fatal("internal testsuite error: stdout called before run")
	}
	return tg.stderr.String()
}