Add InfoHash.HexString convenience

misc.go

@@ -3,6 +3,7 @@ package torrent
 import (
 	"crypto"
 	"errors"
+	"fmt"
 	"math/rand"
 	"os"
 	"path/filepath"
@@ -32,6 +33,10 @@ func (ih *InfoHash) AsString() string {
 	return string(ih[:])
 }
 
+func (ih *InfoHash) HexString() string {
+	return fmt.Sprintf("%x", ih[:])
+}
+
 type piece struct {
 	Hash              pieceSum
 	PendingChunkSpecs map[chunkSpec]struct{}

torrent_test.go

@@ -67,3 +67,11 @@ func TestAppendToCopySlice(t *testing.T) {
 		t.FailNow()
 	}
 }
+
+func TestTorrentString(t *testing.T) {
+	tor := &torrent{}
+	s := tor.InfoHash.HexString()
+	if s != "0000000000000000000000000000000000000000" {
+		t.FailNow()
+	}
+}