@@ -2,10 +2,25 @@
 
 import (
 	"strconv"
 	"testing"
 )
+
+func TestHamming(t *testing.T) {
+	for i := 0; i < 256; i++ {
+		b, result := i, byte(0)
+		for b > 0 {
+			if (b & 1) > 0 {
+				result++
+			}
+			b = b >> 1
+		}
+		if result != Hamming(byte(i)) {
+			t.Error("Invalid hamming weight reported for ", i)
+		}
+	}
+}
 
 var sizes []uint = []uint{0, 31, 32, 33, 61, 63, 64, 127, 128, 129}
 
 func TestBitSize(t *testing.T) {
 	for _, size := range sizes {