}

		if got := MakeFromBytes(bytes); !eql(got, x) {
			t.Errorf("%s: got %s; want %s (bytes = %v)", test, got, x, bytes)
		}
	}
}

func TestUnknown(t *testing.T) {
	u := MakeUnknown()
	var values = []Value{
		u,
		MakeBool(false), // token.ADD ok below, operation is never considered
		MakeString(""),
		MakeInt64(1),