fix some simple atom feed stuff and add some simple feed tests

atom.go

@@ -79,12 +79,16 @@ func newAtomEntry(i *Item) *atomEntry {
 }
 
 func (a *Atom) FeedXml() interface{} {
+	ts := a.Updated
+	if ts.IsZero() {
+		ts = a.Created
+	}
 	feed := &atomFeed{
 		Ns:      ns,
 		Title:   a.Title,
 		Link:    &atomLink{Href: a.Link.Href, Rel: a.Link.Rel},
 		Id:      a.Link.Href,
-		Updated: a.Updated.Format(time.RFC3339)}
+		Updated: ts.Format(time.RFC3339)}
 	for _, e := range a.Items {
 		feed.Entries = append(feed.Entries, newAtomEntry(e))
 	}

feed.go

@@ -29,12 +29,12 @@ type Item struct {
 type Feed struct {
 	Title       string
 	Link        *Link
-	Author      *Author
-	Created     time.Time
-	Updated     time.Time
 	Description string
-	Subtitle    string
+	Author      *Author
+	Updated     time.Time
 	Id          string
+	Subtitle    string
+	Created     time.Time
 	Items       []*Item
 }
 
@@ -48,10 +48,11 @@ type XmlFeed interface {
 
 func ToXML(feed XmlFeed) (string, error) {
 	x := feed.FeedXml()
-	data, err := xml.MarshalIndent(x, " ", " ")
+	data, err := xml.MarshalIndent(x, "", "  ")
 	if err != nil {
 		return "", err
 	}
+	// strip empty line from default xml header
 	s := xml.Header[:len(xml.Header)-1] + string(data)
 	return s, nil
 }

feed_test.go

@@ -1 +1,19 @@
 package syndicate
+
+import (
+	"fmt"
+	"testing"
+	"time"
+)
+
+func TestFeed(t *testing.T) {
+	feed := &Feed{
+		Title:       "jmoiron.net blog",
+		Link:        &Link{Href: "http://jmoiron.net/blog"},
+		Description: "discussion about tech, footie, photos",
+		Author:      &Author{"Jason Moiron", "jmoiron@jmoiron.net"},
+		Created:     time.Now(),
+	}
+
+	fmt.Println(feed.ToAtom())
+}