Wrapping leaf nodes in non polymer elements

runtime/observatory/lib/src/mocks/objects/script.dart

+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file
+
+part of mocks;
+
+class ScriptRefMock extends M.ScriptRef {
+  final String id;
+  final String uri;
+
+  ScriptRefMock({this.id, this.uri});
+}
+
+typedef int TokenToInt(int token);
+
+class ScriptMock extends M.Script {
+  final String id;
+  final int size;
+  final String uri;
+  final String source;
+
+  final TokenToInt _tokenToLine;
+  final TokenToInt _tokenToCol;
+
+  int tokenToLine(int token) => _tokenToLine(token);
+  int tokenToCol(int token) => _tokenToCol(token);
+
+  ScriptMock({this.id, this.size, this.uri, this.source, TokenToInt tokenToLine,
+              TokenToInt tokenToCol})
+    : _tokenToLine = tokenToLine,
+      _tokenToCol = tokenToCol;
+}