}
		return LocationPrioritizedComparison, key
	case "simple":
		return SimpleRevisionComparison, key
	default:
		panic("unknown comparison type")
	}
}

// TestPrioritizationCycles
func TestPrioritizationCycles(t *testing.T) {
	cases := []instance{}
	for _, rev := range []string{"", "default", "not-default"} {
		for _, loc := range []bool{false, true} {