auto_tests/tests/rolling_average.js

   1 /**
   2  * @fileoverview Tests for rolling averages.
   3  *
   4  * @author danvk@google.com (Dan Vanderkam)
   5  */
   6 var rollingAverageTestCase = TestCase("rolling-average");
   7
   8 rollingAverageTestCase.prototype.setUp = function() {
   9   document.body.innerHTML = "<div id='graph'></div>";
  10 };
  11
  12 rollingAverageTestCase.prototype.tearDown = function() {
  13 };
  14
  15 rollingAverageTestCase.prototype.testRollingAverage = function() {
  16   var opts = {
  17     width: 480,
  18     height: 320,
  19     rollPeriod: 1,
  20     showRoller: true
  21   };
  22   var data = "X,Y\n" +
  23       "0,0\n" +
  24       "1,1\n" +
  25       "2,2\n" +
  26       "3,3\n"
  27   ;
  28
  29   var graph = document.getElementById("graph");
  30   var g = new Dygraph(graph, data, opts);
  31
  32   g.setSelection(0); assertEquals("0: Y: 0", Util.getLegend());
  33   g.setSelection(1); assertEquals("1: Y: 1", Util.getLegend());
  34   g.setSelection(2); assertEquals("2: Y: 2", Util.getLegend());
  35   g.setSelection(3); assertEquals("3: Y: 3", Util.getLegend());
  36   assertEquals(1, g.rollPeriod());
  37
  38   g.updateOptions({rollPeriod: 2});
  39   g.setSelection(0); assertEquals("0: Y: 0", Util.getLegend());
  40   g.setSelection(1); assertEquals("1: Y: 0.5", Util.getLegend());
  41   g.setSelection(2); assertEquals("2: Y: 1.5", Util.getLegend());
  42   g.setSelection(3); assertEquals("3: Y: 2.5", Util.getLegend());
  43   assertEquals(2, g.rollPeriod());
  44
  45   g.updateOptions({rollPeriod: 3});
  46   g.setSelection(0); assertEquals("0: Y: 0", Util.getLegend());
  47   g.setSelection(1); assertEquals("1: Y: 0.5", Util.getLegend());
  48   g.setSelection(2); assertEquals("2: Y: 1", Util.getLegend());
  49   g.setSelection(3); assertEquals("3: Y: 2", Util.getLegend());
  50   assertEquals(3, g.rollPeriod());
  51
  52   g.updateOptions({rollPeriod: 4});
  53   g.setSelection(0); assertEquals("0: Y: 0", Util.getLegend());
  54   g.setSelection(1); assertEquals("1: Y: 0.5", Util.getLegend());
  55   g.setSelection(2); assertEquals("2: Y: 1", Util.getLegend());
  56   g.setSelection(3); assertEquals("3: Y: 1.5", Util.getLegend());
  57   assertEquals(4, g.rollPeriod());
  58 };
  59
  60 rollingAverageTestCase.prototype.testRollBoxDoesntDisapper = function() {
  61   var opts = {
  62     showRoller: true
  63   };
  64   var data = "X,Y\n" +
  65       "0,0\n" +
  66       "1,1\n" +
  67       "2,2\n" +
  68       "3,3\n"
  69   ;
  70
  71   var graph = document.getElementById("graph");
  72   var g = new Dygraph(graph, data, opts);
  73
  74   var roll_box = graph.getElementsByTagName("input");
  75   assertEquals(1, roll_box.length);
  76   assertEquals("1", roll_box[0].value);
  77
  78   graph.style.width = "500px";
  79   g.resize();
  80   assertEquals(1, roll_box.length);
  81   assertEquals("1", roll_box[0].value);
  82 };
  83
  84 // Regression test for http://code.google.com/p/dygraphs/issues/detail?id=426
  85 rollingAverageTestCase.prototype.testRollShortFractions = function() {
  86   var opts = {
  87     customBars: true,
  88     labels: ['x', 'A']
  89   };
  90   var data1 = [ [1, [1, 10, 20]] ];
  91   var data2 = [ [1, [1, 10, 20]],
  92                 [2, [1, 20, 30]],
  93               ];
  94
  95   var graph = document.getElementById("graph");
  96   var g = new Dygraph(graph, data1, opts);
  97
  98   var rolled1 = g.rollingAverage(data1, 1);
  99   var rolled2 = g.rollingAverage(data2, 1);
 100
 101   assertEquals(rolled1[0], rolled2[0]);
 102 };