chihaya: Add Equal function for Peer & add tests

chihaya.go

@@ -72,3 +72,11 @@ type Peer struct {
 type Params interface {
 	String(key string) (string, error)
 }
+
+// Equal reports whether peer and x are the same.
+func (peer *Peer) Equal(x *Peer) bool {
+	if peer.ID == x.ID && peer.Port == x.Port && peer.IP.Equal(x.IP) {
+		return true
+	}
+	return false
+}