auto_tests/tests/callback.js

   1 /**
   2  * @fileoverview Test cases for the callbacks.
   3  *
   4  * @author uemit.seren@gmail.com (Ümit Seren)
   5  */
   6
   7 var CallbackTestCase = TestCase("callback");
   8
   9 CallbackTestCase.prototype.setUp = function() {
  10   document.body.innerHTML = "<div id='graph'></div><div id='selection'></div>";
  11   this.styleSheet = document.createElement("style");
  12   this.styleSheet.type = "text/css";
  13   document.getElementsByTagName("head")[0].appendChild(this.styleSheet);
  14 };
  15
  16 CallbackTestCase.prototype.tearDown = function() {
  17 };
  18
  19 var data = "X,a\,b,c\n" +
  20  "10,-1,1,2\n" +
  21  "11,0,3,1\n" +
  22  "12,1,4,2\n" +
  23  "13,0,2,3\n";
  24
  25
  26 /**
  27  * This tests that when the function idxToRow_ returns the proper row and the onHiglightCallback
  28  * is properly called when the  first series is hidden (setVisibility = false)
  29  *
  30  */
  31 CallbackTestCase.prototype.testHighlightCallbackIsCalled = function() {
  32   var h_row;
  33   var h_pts;
  34
  35   var highlightCallback  =  function(e, x, pts, row) {
  36     h_row = row;
  37     h_pts = pts;
  38   };
  39
  40   var graph = document.getElementById("graph");
  41   var g = new Dygraph(graph, data,
  42       {
  43         width: 100,
  44         height: 100,
  45         visibility: [false, true, true],
  46         highlightCallback: highlightCallback
  47       });
  48
  49   DygraphOps.dispatchMouseMove(g, 13, 10);
  50
  51   //check correct row is returned
  52   assertEquals(3, h_row);
  53   //check there are only two points (because first series is hidden)
  54   assertEquals(2, h_pts.length);
  55 };
  56
  57
  58 /**
  59  * Test that drawPointCallback isn't called when drawPoints is false
  60  */
  61 CallbackTestCase.prototype.testDrawPointCallback_disabled = function() {
  62   var called = false;
  63
  64   var callback = function() {
  65     called = true;
  66   };
  67
  68   var graph = document.getElementById("graph");
  69   var g = new Dygraph(graph, data, {
  70       drawPointCallback : callback,
  71     });
  72
  73   assertFalse(called);
  74 };
  75
  76 /**
  77  * Test that drawPointCallback is called when drawPoints is true
  78  */
  79 CallbackTestCase.prototype.testDrawPointCallback_enabled = function() {
  80   var called = false;
  81
  82   var callback = function() {
  83     called = true;
  84   };
  85
  86   var graph = document.getElementById("graph");
  87   var g = new Dygraph(graph, data, {
  88       drawPoints : true,
  89       drawPointCallback : callback
  90     });
  91
  92   assertTrue(called);
  93 };
  94
  95 /**
  96  * Test that drawPointCallback is called when drawPoints is true
  97  */
  98 CallbackTestCase.prototype.testDrawPointCallback_pointSize = function() {
  99   var pointSize = 0;
 100   var count = 0;
 101
 102   var callback = function(g, seriesName, canvasContext, cx, cy, color, pointSizeParam) {
 103     pointSize = pointSizeParam;
 104     count++;
 105   };
 106
 107   var graph = document.getElementById("graph");
 108   var g = new Dygraph(graph, data, {
 109       drawPoints : true,
 110       drawPointCallback : callback
 111     });
 112
 113   assertEquals(1.5, pointSize);
 114   assertEquals(12, count); // one call per data point.
 115
 116   var g = new Dygraph(graph, data, {
 117       drawPoints : true,
 118       drawPointCallback : callback,
 119       pointSize : 8
 120     });
 121
 122   assertEquals(8, pointSize);
 123 };
 124
 125 /**
 126  * Test that drawPointCallback is called for isolated points when
 127  * drawPoints is false, and also for gap points if that's enabled.
 128  */
 129 CallbackTestCase.prototype.testDrawPointCallback_isolated = function() {
 130   var xvalues = [];
 131
 132   var g;
 133   var callback = function(g, seriesName, canvasContext, cx, cy, color, pointSizeParam) {
 134     var dx = g.toDataXCoord(cx);
 135     xvalues.push(dx);
 136     Dygraph.Circles.DEFAULT.apply(this, arguments);
 137   };
 138
 139   var graph = document.getElementById("graph");
 140   var testdata = [[10, 2], [11, 3], [12, NaN], [13, 2], [14, NaN], [15, 3]];
 141   var graphOpts = {
 142       labels: ['X', 'Y'],
 143       valueRange: [0, 4],
 144       drawPoints : false,
 145       drawPointCallback : callback,
 146       pointSize : 8
 147   };
 148
 149   // Test that isolated points get drawn
 150   g = new Dygraph(graph, testdata, graphOpts);
 151   assertEquals(2, xvalues.length);
 152   assertEquals(13, xvalues[0]);
 153   assertEquals(15, xvalues[1]);
 154
 155   // Test that isolated points + gap points get drawn when drawGapPoints is set.
 156   // This should add one point at the right edge of the segment at x=11, but not
 157   // at the graph edge at x=10.
 158   xvalues = []; // Reset for new test
 159   graphOpts.drawGapPoints = true;
 160   g = new Dygraph(graph, testdata, graphOpts);
 161   assertEquals(3, xvalues.length);
 162   assertEquals(11, xvalues[0]);
 163   assertEquals(13, xvalues[1]);
 164   assertEquals(15, xvalues[2]);
 165 };
 166
 167 /**
 168  * This tests that when the function idxToRow_ returns the proper row and the onHiglightCallback
 169  * is properly called when the first series is hidden (setVisibility = false)
 170  *
 171  */
 172 CallbackTestCase.prototype.testDrawHighlightPointCallbackIsCalled = function() {
 173   var called = false;
 174
 175   var drawHighlightPointCallback  = function() {
 176     called = true;
 177   };
 178
 179   var graph = document.getElementById("graph");
 180   var g = new Dygraph(graph, data,
 181       {
 182         width: 100,
 183         height : 100,
 184         drawHighlightPointCallback : drawHighlightPointCallback
 185       });
 186
 187   assertFalse(called);
 188   DygraphOps.dispatchMouseMove(g, 13, 10);
 189   assertTrue(called);
 190 };
 191
 192 /**
 193  * Test the closest-series highlighting methods for normal and stacked modes.
 194  * Also pass in line widths for plain and highlighted lines for easier visual
 195  * confirmation that the highlighted line is drawn on top of the others.
 196  */
 197 var runClosestTest = function(isStacked, widthNormal, widthHighlighted) {
 198   var h_row;
 199   var h_pts;
 200   var h_series;
 201
 202   var graph = document.getElementById("graph");
 203   var g = new Dygraph(graph, data,
 204       {
 205         width: 600,
 206         height: 400,
 207         visibility: [false, true, true],
 208         stackedGraph: isStacked,
 209         strokeWidth: widthNormal,
 210         strokeBorderWidth: 2,
 211         highlightCircleSize: widthNormal * 2,
 212         highlightSeriesBackgroundAlpha: 0.3,
 213
 214         highlightSeriesOpts: {
 215           strokeWidth: widthHighlighted,
 216           highlightCircleSize: widthHighlighted * 2
 217         }
 218       });
 219
 220   var highlightCallback  =  function(e, x, pts, row, set) {
 221     h_row = row;
 222     h_pts = pts;
 223     h_series = set;
 224     document.getElementById('selection').innerHTML='row=' + row + ', set=' + set;
 225   };
 226
 227   g.updateOptions({highlightCallback: highlightCallback}, true);
 228
 229   if (isStacked) {
 230     DygraphOps.dispatchMouseMove(g, 11.45, 1.4);
 231     assertEquals(1, h_row);
 232     assertEquals('c', h_series);
 233
 234     //now move up in the same row
 235     DygraphOps.dispatchMouseMove(g, 11.45, 1.5);
 236     assertEquals(1, h_row);
 237     assertEquals('b', h_series);
 238
 239     //and a bit to the right
 240     DygraphOps.dispatchMouseMove(g, 11.55, 1.5);
 241     assertEquals(2, h_row);
 242     assertEquals('c', h_series);
 243   } else {
 244     DygraphOps.dispatchMouseMove(g, 11, 1.5);
 245     assertEquals(1, h_row);
 246     assertEquals('c', h_series);
 247
 248     //now move up in the same row
 249     DygraphOps.dispatchMouseMove(g, 11, 2.5);
 250     assertEquals(1, h_row);
 251     assertEquals('b', h_series);
 252   }
 253
 254   return g;
 255 };
 256
 257 /**
 258  * Test basic closest-point highlighting.
 259  */
 260 CallbackTestCase.prototype.testClosestPointCallback = function() {
 261   runClosestTest(false, 1, 3);
 262 }
 263
 264 /**
 265  * Test setSelection() with series name
 266  */
 267 CallbackTestCase.prototype.testSetSelection = function() {
 268   var g = runClosestTest(false, 1, 3);
 269   assertEquals(1, g.attr_('strokeWidth', 'c'));
 270   g.setSelection(false, 'c');
 271   assertEquals(3, g.attr_('strokeWidth', 'c'));
 272 }
 273
 274 /**
 275  * Test closest-point highlighting for stacked graph
 276  */
 277 CallbackTestCase.prototype.testClosestPointStackedCallback = function() {
 278   runClosestTest(true, 1, 3);
 279 }
 280
 281 /**
 282  * Closest-point highlighting with legend CSS - border around active series.
 283  */
 284 CallbackTestCase.prototype.testClosestPointCallbackCss1 = function() {
 285   var css = "div.dygraph-legend > span { display: block; }\n" +
 286     "div.dygraph-legend > span.highlight { border: 1px solid grey; }\n";
 287   this.styleSheet.innerHTML = css;
 288   runClosestTest(false, 2, 4);
 289   this.styleSheet.innerHTML = '';
 290 }
 291
 292 /**
 293  * Closest-point highlighting with legend CSS - show only closest series.
 294  */
 295 CallbackTestCase.prototype.testClosestPointCallbackCss2 = function() {
 296   var css = "div.dygraph-legend > span { display: none; }\n" +
 297     "div.dygraph-legend > span.highlight { display: inline; }\n";
 298   this.styleSheet.innerHTML = css;
 299   runClosestTest(false, 10, 15);
 300   this.styleSheet.innerHTML = '';
 301   // TODO(klausw): verify that the highlighted line is drawn on top?
 302 }
 303
 304 /**
 305  * This tests that closest point searches work for data containing NaNs.
 306  *
 307  * It's intended to catch a regression where a NaN Y value confuses the
 308  * closest-point algorithm, treating it as closer as any previous point.
 309  */
 310 CallbackTestCase.prototype.testNaNData = function() {
 311   var dataNaN = [
 312     [9, -1, NaN, NaN],
 313     [10, -1, 1, 2],
 314     [11, 0, 3, 1],
 315     [12, 1, 4, NaN],
 316     [13, 0, 2, 3],
 317     [14, -1, 1, 4]];
 318
 319   var h_row;
 320   var h_pts;
 321
 322   var highlightCallback  =  function(e, x, pts, row) {
 323     h_row = row;
 324     h_pts = pts;
 325   };
 326
 327   var graph = document.getElementById("graph");
 328   var g = new Dygraph(graph, dataNaN,
 329       {
 330         width: 600,
 331         height: 400,
 332         labels: ['x', 'a', 'b', 'c'],
 333         visibility: [false, true, true],
 334         highlightCallback: highlightCallback
 335       });
 336
 337   DygraphOps.dispatchMouseMove(g, 10.1, 0.9);
 338   //check correct row is returned
 339   assertEquals(1, h_row);
 340
 341   // Explicitly test closest point algorithms
 342   var dom = g.toDomCoords(10.1, 0.9);
 343   assertEquals(1, g.findClosestRow(dom[0]));
 344
 345   var res = g.findClosestPoint(dom[0], dom[1]);
 346   assertEquals(1, res.row);
 347   assertEquals('b', res.seriesName);
 348
 349   res = g.findStackedPoint(dom[0], dom[1]);
 350   assertEquals(1, res.row);
 351   assertEquals('c', res.seriesName);
 352 };
 353
 354 /**
 355  * This tests that stacked point searches work for data containing NaNs.
 356  */
 357 CallbackTestCase.prototype.testNaNDataStack = function() {
 358   var dataNaN = [
 359     [9, -1, NaN, NaN],
 360     [10, -1, 1, 2],
 361     [11, 0, 3, 1],
 362     [12, 1, NaN, 2],
 363     [13, 0, 2, 3],
 364     [14, -1, 1, 4],
 365     [15, 0, 2, NaN],
 366     [16, 1, 1, 3],
 367     [17, 1, NaN, 3],
 368     [18, 0, 2, 5],
 369     [19, 0, 1, 4]];
 370
 371   var h_row;
 372   var h_pts;
 373
 374   var highlightCallback  =  function(e, x, pts, row) {
 375     h_row = row;
 376     h_pts = pts;
 377   };
 378
 379   var graph = document.getElementById("graph");
 380   var g = new Dygraph(graph, dataNaN,
 381       {
 382         width: 600,
 383         height: 400,
 384         labels: ['x', 'a', 'b', 'c'],
 385         visibility: [false, true, true],
 386         stackedGraph: true,
 387         highlightCallback: highlightCallback
 388       });
 389
 390   DygraphOps.dispatchMouseMove(g, 10.1, 0.9);
 391   //check correct row is returned
 392   assertEquals(1, h_row);
 393
 394   // Explicitly test stacked point algorithm.
 395   var dom = g.toDomCoords(10.1, 0.9);
 396   var res = g.findStackedPoint(dom[0], dom[1]);
 397   assertEquals(1, res.row);
 398   assertEquals('c', res.seriesName);
 399
 400   // First gap, no data due to NaN contagion.
 401   dom = g.toDomCoords(12.1, 0.9);
 402   res = g.findStackedPoint(dom[0], dom[1]);
 403   assertEquals(3, res.row);
 404   assertEquals(undefined, res.seriesName);
 405
 406   // Second gap, no data due to NaN contagion.
 407   dom = g.toDomCoords(15.1, 0.9);
 408   res = g.findStackedPoint(dom[0], dom[1]);
 409   assertEquals(6, res.row);
 410   assertEquals(undefined, res.seriesName);
 411
 412   // Isolated points should work, finding series b in this case.
 413   dom = g.toDomCoords(15.9, 3.1);
 414   res = g.findStackedPoint(dom[0], dom[1]);
 415   assertEquals(7, res.row);
 416   assertEquals('b', res.seriesName);
 417 };
 418
 419 CallbackTestCase.prototype.testGapHighlight = function() {
 420   var dataGap = [
 421     [1, null, 3],
 422     [2, 2, null],
 423     [3, null, 5],
 424     [4, 4, null],
 425     [5, null, 7],
 426     [6, NaN, null],
 427     [8, 8, null],
 428     [10, 10, null]];
 429
 430   var h_row;
 431   var h_pts;
 432
 433   var highlightCallback  =  function(e, x, pts, row) {
 434     h_row = row;
 435     h_pts = pts;
 436   };
 437
 438   var graph = document.getElementById("graph");
 439   var g = new Dygraph(graph, dataGap, {
 440      width: 400,
 441      height: 300,
 442      //stackedGraph: true,
 443      connectSeparatedPoints: true,
 444      drawPoints: true,
 445      labels: ['x', 'A', 'B'],
 446      highlightCallback : highlightCallback
 447   });
 448
 449   DygraphOps.dispatchMouseMove(g, 1.1, 10);
 450   //point from series B
 451   assertEquals(0, h_row);
 452   assertEquals(1, h_pts.length);
 453   assertEquals(3, h_pts[0].yval);
 454   assertEquals('B', h_pts[0].name);
 455
 456   DygraphOps.dispatchMouseMove(g, 6.1, 10);
 457   // A is NaN at x=6
 458   assertEquals(1, h_pts.length);
 459   assert(isNaN(h_pts[0].yval));
 460   assertEquals('A', h_pts[0].name);
 461
 462   DygraphOps.dispatchMouseMove(g, 8.1, 10);
 463   //point from series A
 464   assertEquals(6, h_row);
 465   assertEquals(1, h_pts.length);
 466   assertEquals(8, h_pts[0].yval);
 467   assertEquals('A', h_pts[0].name);
 468 };