feat: complete tests

internal/watcher/watcher.go

@@ -13,13 +13,23 @@ type watcher struct {
 	deploy    pkgwatcher.DeployFunc
 }
 
+type notifier struct{}
+
+func (n *notifier) NewWatcher() (*fsnotify.Watcher, error) {
+	return fsnotify.NewWatcher()
+}
+
+func NewNotifier() *notifier {
+	return &notifier{}
+}
+
 var (
 	errEventsClosedChan = errors.New("events is closed")
 	errErrorsClosedChan = errors.New("errors is closed")
 )
 
-func NewWatcher(deploy pkgwatcher.DeployFunc) *watcher {
-	wt, err := fsnotify.NewWatcher()
+func NewWatcher(notifier pkgwatcher.NotifyIface, deploy pkgwatcher.DeployFunc) *watcher {
+	wt, err := notifier.NewWatcher()
 	if err != nil {
 		log.Printf("fsnotify.NewWatcher: %s\n", err)
 		return nil