panic("unreachable")
		}
		if !slices.IsSortedFunc(prefOrder, isBetter) {
			t.Error("preference order is not sorted according to the rules")
		}
	}
}

func TestVersionName(t *testing.T) {
	if got, exp := VersionName(VersionTLS13), "TLS 1.3"; got != exp {
		t.Errorf("unexpected VersionName: got %q, expected %q", got, exp)
	}
	if got, exp := VersionName(0x12a), "0x012A"; got != exp {