Added Equal func

index.go

 package multiaddr
 
 import (
+	"bytes"
 	"fmt"
 	"strings"
 )
@@ -19,6 +20,11 @@ func NewMultiaddr(s string) (*Multiaddr, error) {
 	return &Multiaddr{Bytes: b}, nil
 }
 
+// Equal tests whether two multiaddrs are equal
+func (m *Multiaddr) Equal(m2 *Multiaddr) bool {
+	return bytes.Equal(m.Bytes, m2.Bytes)
+}
+
 // String returns the string representation of a Multiaddr
 func (m *Multiaddr) String() (string, error) {
 	return bytesToString(m.Bytes)

multiaddr_test.go

@@ -6,6 +6,40 @@ import (
 	"testing"
 )
 
+func newMultiaddr(t *testing.T, a string) *Multiaddr {
+	m, err := NewMultiaddr(a)
+	if err != nil {
+		t.Error(err)
+	}
+	return m
+}
+
+func TestEqual(t *testing.T) {
+	m1 := newMultiaddr(t, "/ip4/127.0.0.1/udp/1234")
+	m2 := newMultiaddr(t, "/ip4/127.0.0.1/tcp/1234")
+	m3 := newMultiaddr(t, "/ip4/127.0.0.1/tcp/1234")
+
+	if m1.Equal(m2) {
+		t.Error("should not be equal")
+	}
+
+	if m2.Equal(m1) {
+		t.Error("should not be equal")
+	}
+
+	if !m2.Equal(m3) {
+		t.Error("should be equal")
+	}
+
+	if !m3.Equal(m2) {
+		t.Error("should be equal")
+	}
+
+	if !m1.Equal(m1) {
+		t.Error("should be equal")
+	}
+}
+
 func TestStringToBytes(t *testing.T) {
 
 	testString := func(s string, h string) {