fix test cases

handler.go

@@ -59,6 +59,16 @@ func ChainHandlerOption(chain *Chain) HandlerOption {
 func UsersHandlerOption(users ...*url.Userinfo) HandlerOption {
 	return func(opts *HandlerOptions) {
 		opts.Users = users
+
+		kvs := make(map[string]string)
+		for _, u := range users {
+			if u != nil {
+				kvs[u.Username()], _ = u.Password()
+			}
+		}
+		if len(kvs) > 0 {
+			opts.Authenticator = NewLocalAuthenticator(kvs)
+		}
 	}
 }