<!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.
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<link rel="import" href="/base/task.html">
<link rel="import" href="/core/test_utils.html">
<link rel="import" href="/extras/importer/trace_event_importer.html">
<link rel="import" href="/core/timeline_view.html">

<script>
'use strict';

tr.b.unittest.testSuite(function() {
  var newSliceEx = tr.c.test_utils.newSliceEx;

  var Selection = tr.c.Selection;
  var SelectionState = tr.model.SelectionState;
  var Task = tr.b.Task;

  function newSimpleFakeTimelineView() {
    var m = tr.c.test_utils.newModel(function(m) {
      m.p1 = m.getOrCreateProcess(1);
      m.t2 = m.p1.getOrCreateThread(2);

      m.sA = m.t2.sliceGroup.pushSlice(
          newSliceEx({title: 'a', start: 0, end: 5}));
      m.sB = m.t2.sliceGroup.pushSlice(
          newSliceEx({title: 'b', start: 10, end: 15}));
      m.sC = m.t2.sliceGroup.pushSlice(
          newSliceEx({title: 'c', start: 20, end: 20}));
    });

    // Fake timeline view. So fake its ... just wow.
    var timelineView = {
      model: m
    };
    return timelineView;
  }

  function doesCauseChangeToFire(selectionController, cb, opt_this) {
    var didFire = false;
    function didFireCb() {
      didFire = true;
    };
    selectionController.addEventListener('change', didFireCb);
    cb.call(opt_this);
    selectionController.removeEventListener('change', didFireCb);
    return didFire;
  }

  test('simpleStateChanges', function() {
    var timelineView = newSimpleFakeTimelineView();
    var selectionController = new tr.c.SelectionController(timelineView);
    var m = timelineView.model;

    // Setting causes change.
    var bs = new tr.c.BrushingState();
    bs.selection = new Selection([m.sA]);
    assert.isTrue(doesCauseChangeToFire(
        selectionController,
        function() {
          selectionController.currentBrushingState = bs;
        }));
    assert.isTrue(bs.isAppliedToModel);

    // Setting value equivalent doesn't cause change event.
    var bs2 = bs.clone();
    assert.isFalse(doesCauseChangeToFire(
        selectionController,
        function() {
          selectionController.currentBrushingState = bs2;
        }));
    assert.equal(selectionController.currentBrushingState, bs2);
    assert.isTrue(selectionController.currentBrushingState.isAppliedToModel);

    // Setting to something different unapplies the old bs.
    var bs3 = new tr.c.BrushingState();
    bs3.findMatches = new Selection([m.sA, m.sB]);
    selectionController.currentBrushingState = bs3;
    assert.isTrue(bs3.isAppliedToModel);
    assert.isFalse(bs2.isAppliedToModel);
  });

});
</script>