this seems okay

storage/packable/packable_test.go

@@ -1,6 +1,9 @@
 package packable
 
-import "testing"
+import (
+	"net/url"
+	"testing"
+)
 
 func TestPackableString(t *testing.T) {
 	raw := "hello"
@@ -21,3 +24,24 @@ func TestPackableString(t *testing.T) {
 		t.Errorf("wrong decoded string: %v vs %v", x, raw)
 	}
 }
+
+func TestPackableURL(t *testing.T) {
+	raw := &url.URL{
+		Scheme: "a",
+		Host:   "b",
+		Path:   "c",
+	}
+	s := NewURL(raw)
+
+	packed, err := s.Encode()
+	if err != nil {
+		t.Errorf("cannot encode URL: %v", err)
+	}
+
+	x := NewURL()
+	if err := x.Decode(packed); err != nil {
+		t.Errorf("cannot decode URL: %v", err)
+	} else if *x != *s {
+		t.Errorf("wrong decoded URL: %v (%T) vs %v (%T)", x, x, s, s)
+	}
+}