Test and code refactor

client.go

@@ -127,6 +127,7 @@ func (c *Client) Recv() <-chan interface{} {
 }
 
 // Send sends message text.
+// TODO Move to Go XML Marshaller
 func (c *Client) Send(packet string) error {
 	fmt.Fprintf(c.Session.socketProxy, packet) // TODO handle errors
 	return nil

cmd/xmpp_component/xmpp_component.go

@@ -58,20 +58,21 @@ func (c MyComponent) processIQ(iqType, id, from string, inner *xmpp.Node) {
 	switch inner.XMLName.Space + " " + iqType {
 	case NSDiscoInfo + " get":
 		fmt.Println("Send Disco Info")
-		result := fmt.Sprintf(`<iq type='result'
+
-    from='%s'
+		iq := xmpp.NewIQ("result", "admin@localhost", "test@localhost", "1", "en")
-    to='%s'
+		payload := xmpp.DiscoInfo{
-    id='%s'>
+			Identity: xmpp.Identity{
-  <query xmlns='http://jabber.org/protocol/disco#info'>
+				Name:     "Test Gateway",
-    <identity
+				Category: "gateway",
-        category='%s'
+				Type:     "mqtt",
-        type='%s'
+			},
-        name='%s'/>
+			Features: []xmpp.Feature{
-    <feature var='http://jabber.org/protocol/disco#info'/>
+				{Var: "http://jabber.org/protocol/disco#info"},
-    <feature var='http://jabber.org/protocol/disco#items'/>
+				{Var: "http://jabber.org/protocol/disco#item"},
-  </query>
+			},
-</iq>`, c.xmpp.Host, from, id, c.Category, c.Type, c.Name)
+		}
-		c.xmpp.Send(result)
+		iq.AddPayload(&payload)
+		c.xmpp.Send(iq)
 	default:
 		iqErr := fmt.Sprintf(`<iq type='error'
     from='%s'
@@ -81,6 +82,6 @@ func (c MyComponent) processIQ(iqType, id, from string, inner *xmpp.Node) {
       <feature-not-implemented xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/>
      </error>
 </iq>`, c.xmpp.Host, from, id)
-		c.xmpp.Send(iqErr)
+		c.xmpp.SendOld(iqErr) // FIXME Remove that method
 	}
 }

component.go

@@ -94,7 +94,19 @@ func (c *Component) ReadPacket() (Packet, error) {
 	return next(c.decoder)
 }
 
-func (c *Component) Send(packet string) error {
+func (c *Component) Send(packet Packet) error {
+	data, err := xml.Marshal(packet)
+	if err != nil {
+		return errors.New("cannot marshal packet " + err.Error())
+	}
+
+	if _, err := fmt.Fprintf(c.conn, string(data)); err != nil {
+		return errors.New("cannot send packet " + err.Error())
+	}
+	return nil
+}
+
+func (c *Component) SendOld(packet string) error {
 	if _, err := fmt.Fprintf(c.conn, packet); err != nil {
 		return errors.New("cannot send packet " + err.Error())
 	}

iq.go

@@ -152,7 +152,7 @@ func (iq *IQ) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
 					if err != nil {
 						return err
 					}
-					iq.Payload = append(iq.Payload, iqPl) // []IQPayload{iqPl}
+					iq.Payload = append(iq.Payload, iqPl)
 				}
 			}
 
@@ -232,17 +232,23 @@ func (*Node) IsIQPayload() {}
 // Disco
 
 type DiscoInfo struct {
-	XMLName  xml.Name `xml:"http://jabber.org/protocol/disco#info query"`
+	XMLName  xml.Name  `xml:"http://jabber.org/protocol/disco#info query"`
-	Identity Identity
+	Identity Identity  `xml:"identity"`
+	Features []Feature `xml:"feature"`
 }
 
 func (*DiscoInfo) IsIQPayload() {}
 
 type Identity struct {
-	XMLName  xml.Name `xml:"identity"`
+	XMLName  xml.Name `xml:"identity,omitempty"`
-	Name     string   `xml:"name,attr"`
+	Name     string   `xml:"name,attr,omitempty"`
-	Category string   `xml:"category,attr"`
+	Category string   `xml:"category,attr,omitempty"`
-	Type     string   `xml:"type,attr"`
+	Type     string   `xml:"type,attr,omitempty"`
+}
+
+type Feature struct {
+	XMLName xml.Name `xml:"feature"`
+	Var     string   `xml:"var,attr"`
 }
 
 // ============================================================================

iq_test.go

@@ -2,9 +2,10 @@ package xmpp // import "fluux.io/xmpp"
 
 import (
 	"encoding/xml"
-	"fmt"
 	"reflect"
 	"testing"
+
+	"github.com/google/go-cmp/cmp"
 )
 
 func TestUnmarshalIqs(t *testing.T) {
@@ -30,63 +31,20 @@ func TestUnmarshalIqs(t *testing.T) {
 }
 
 func TestGenerateIq(t *testing.T) {
-	iq := NewIQ("get", "admin@localhost", "test@localhost", "1", "en")
+	iq := NewIQ("result", "admin@localhost", "test@localhost", "1", "en")
-	payload := Node{
-		XMLName: xml.Name{
-			Space: "http://jabber.org/protocol/disco#info",
-			Local: "query",
-		},
-		Nodes: []Node{
-			{XMLName: xml.Name{
-				Space: "http://jabber.org/protocol/disco#info",
-				Local: "identity",
-			},
-				Attrs: []xml.Attr{
-					{Name: xml.Name{Local: "category"}, Value: "gateway"},
-					{Name: xml.Name{Local: "type"}, Value: "mqtt"},
-					{Name: xml.Name{Local: "name"}, Value: "Test Gateway"},
-				},
-				Nodes: nil,
-			}},
-	}
-	iq.AddPayload(&payload)
-	data, err := xml.Marshal(iq)
-	if err != nil {
-		t.Errorf("cannot marshal xml structure")
-	}
-
-	fmt.Printf("XML Struct: %s\n", data)
-
-	var parsedIQ = new(IQ)
-	if err = xml.Unmarshal(data, parsedIQ); err != nil {
-		t.Errorf("Unmarshal(%s) returned error", data)
-	}
-
-	if !reflect.DeepEqual(parsedIQ.Payload[0], iq.Payload[0]) {
-		t.Errorf("expecting result %+v = %+v", parsedIQ.Payload[0], iq.Payload[0])
-	}
-
-	fmt.Println("ParsedIQ", parsedIQ)
-}
-
-func TestGenerateIqNew(t *testing.T) {
-	iq := NewIQ("get", "admin@localhost", "test@localhost", "1", "en")
 	payload := DiscoInfo{
-		XMLName: xml.Name{
-			Space: "http://jabber.org/protocol/disco#info",
-			Local: "query",
-		},
 		Identity: Identity{
-			XMLName: xml.Name{
-				Space: "http://jabber.org/protocol/disco#info",
-				Local: "identity",
-			},
 			Name:     "Test Gateway",
 			Category: "gateway",
 			Type:     "mqtt",
 		},
+		Features: []Feature{
+			{Var: "http://jabber.org/protocol/disco#info"},
+			{Var: "http://jabber.org/protocol/disco#item"},
+		},
 	}
 	iq.AddPayload(&payload)
+
 	data, err := xml.Marshal(iq)
 	if err != nil {
 		t.Errorf("cannot marshal xml structure")
@@ -97,7 +55,29 @@ func TestGenerateIqNew(t *testing.T) {
 		t.Errorf("Unmarshal(%s) returned error", data)
 	}
 
-	if !reflect.DeepEqual(parsedIQ.Payload[0], iq.Payload[0]) {
+	if !xmlEqual(parsedIQ.Payload, iq.Payload) {
-		t.Errorf("expecting result %+v = %+v", parsedIQ.Payload[0], iq.Payload[0])
+		t.Errorf("non matching items\n%s", cmp.Diff(parsedIQ.Payload, iq.Payload))
 	}
 }
+
+// Compare iq structure but ignore empty namespace as they are set properly on
+// marshal / unmarshal. There is no need to manage them on the manually
+// crafted structure.
+func xmlEqual(x, y interface{}) bool {
+	alwaysEqual := cmp.Comparer(func(_, _ interface{}) bool { return true })
+	opts := cmp.Options{
+		cmp.FilterValues(func(x, y interface{}) bool {
+			xx, xok := x.(xml.Name)
+			yy, yok := y.(xml.Name)
+			if xok && yok {
+				zero := xml.Name{}
+				if xx == zero || yy == zero {
+					return true
+				}
+			}
+			return false
+		}, alwaysEqual),
+	}
+
+	return cmp.Equal(x, y, opts)
+}