<!DOCTYPE html>
<!--
Copyright (c) 2013 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<link rel="import" href="/core/timeline_viewport.html">

<script>
'use strict';

tr.b.unittest.testSuite(function() {
  test('memoization', function() {

    var vp = new tr.c.TimelineViewport(document.createElement('div'));

    var slice = { guid: 1 };

    vp.modelTrackContainer = {
      addEventsToTrackMap: function(eventToTrackMap) {
        eventToTrackMap.addEvent(slice, 'track');
      },
      addEventListener: function() {}
    };

    assert.isUndefined(vp.trackForEvent(slice));
    vp.rebuildEventToTrackMap();

    assert.equal(vp.trackForEvent(slice), 'track');
  });
});
</script>