.

wcfs/δbtail_test.go

@@ -373,3 +373,34 @@ func TestIntSets(t *testing.T) {
 		t.Fatalf("error:\ngot:  %v\nwant: %v", got, want)
 	}
 }
+
+
+// kvdiff returns differens in between kv1 and kv2.
+var DEL = "ø"
+type kvdelta1 struct {
+	k Key
+	v string // DEL means delete
+}
+func kvdiff(kv1, kv2 map[Key]string) []kvdelta1 {
+	delta := []kvdelta1{}
+	keys := SetI64{}
+	for k := range kv1 { keys.Add(k) }
+	for k := range kv2 { keys.Add(k) }
+	keyv := []Key{}
+	for k := range keys { keyv = append(keyv, k) }
+	sort.Slice(keyv, func(i,j int) bool {
+		return keyv[i] < keyv[j]
+	})
+
+	for _, k := range keyv {
+		v1, ok := kv1[k]
+		if !ok { v1 = DEL }
+		v2, ok := kv2[k]
+		if !ok { v2 = DEL }
+		if v1 != v2 {
+			delta = append(delta, kvdelta1{k,v2})
+		}
+	}
+
+	return delta
+}