8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
}

type quantIndex int

const (
	quantIndexLuminance quantIndex = iota
	quantIndexChrominance
	nQuantIndex
)

// unscaledQuant are the unscaled quantization tables in zig-zag order. Each
// encoder copies and scales the tables according to its quality parameter.

func TestUnscaledQuant(t *testing.T) {
	bad := false
	for i := quantIndex(0); i < nQuantIndex; i++ {
		for zig := 0; zig < blockSize; zig++ {
			got := unscaledQuant[i][zig]
			want := unscaledQuantInNaturalOrder[i][unzig[zig]]
			if got != want {
				t.Errorf("i=%d, zig=%d: got %d, want %d", i, zig, got, want)
				bad = true
			}
		}
	}
	if bad {
		names := [nQuantIndex]string{"Luminance", "Chrominance"}
		buf := &strings.Builder{}