auto_tests/tests/axis_labels.js

   1 /**
   2  * @fileoverview Test cases for how axis labels are chosen and formatted.
   3  *
   4  * @author dan@dygraphs.com (Dan Vanderkam)
   5  */
   6 var AxisLabelsTestCase = TestCase("axis-labels");
   7
   8 AxisLabelsTestCase.prototype.setUp = function() {
   9   document.body.innerHTML = "<div id='graph'></div>";
  10 };
  11
  12 AxisLabelsTestCase.prototype.tearDown = function() {
  13 };
  14
  15 AxisLabelsTestCase.simpleData =
  16     "X,Y,Y2\n" +
  17     "0,-1,.5\n" +
  18     "1,0,.7\n" +
  19     "2,1,.4\n" +
  20     "3,0,.98\n";
  21
  22 AxisLabelsTestCase.prototype.kCloseFloat = 1.0e-10;
  23
  24 AxisLabelsTestCase.prototype.testMinusOneToOne = function() {
  25   var opts = {
  26     width: 480,
  27     height: 320
  28   };
  29   var data = "X,Y\n" +
  30       "0,-1\n" +
  31       "1,0\n" +
  32       "2,1\n" +
  33       "3,0\n"
  34   ;
  35
  36   var graph = document.getElementById("graph");
  37   var g = new Dygraph(graph, data, opts);
  38
  39   // TODO(danvk): would ['-1.0','-0.5','0.0','0.5','1.0'] be better?
  40   assertEquals(['-1','-0.5','0','0.5','1'], Util.getYLabels());
  41
  42   // Go up to 2
  43   data += "4,2\n";
  44   g.updateOptions({file: data});
  45   assertEquals(['-1','-0.5','0','0.5','1','1.5','2'], Util.getYLabels());
  46
  47   // Now 10
  48   data += "5,10\n";
  49   g.updateOptions({file: data});
  50   assertEquals(['-2','0','2','4','6','8','10'], Util.getYLabels());
  51
  52   // Now 100
  53   data += "6,100\n";
  54   g.updateOptions({file: data});
  55   assertEquals(['0','20','40','60','80','100'], Util.getYLabels());
  56
  57   g.setSelection(0);
  58   assertEquals('0: Y: -1', Util.getLegend());
  59 };
  60
  61 AxisLabelsTestCase.prototype.testSmallRangeNearZero = function() {
  62   var opts = {
  63     drawAxesAtZero: true,
  64     width: 480,
  65     height: 320
  66   };
  67   var data = "X,Y\n" +
  68       "0,-1\n" +
  69       "1,0\n" +
  70       "2,1\n" +
  71       "3,0\n"
  72   ;
  73   opts.valueRange = [-0.1, 0.1];
  74
  75   var graph = document.getElementById("graph");
  76   var g = new Dygraph(graph, data, opts);
  77   assertEqualsDelta([-0.1, -0.08, -0.06, -0.04, -0.02, 0, 0.02, 0.04, 0.06, 0.08],
  78                     Util.makeNumbers(Util.getYLabels()), this.kCloseFloat);
  79
  80   opts.valueRange = [-0.05, 0.05];
  81   g.updateOptions(opts);
  82   assertEquals([-0.05, -0.04, -0.03, -0.02, -0.01, 0, 0.01, 0.02, 0.03, 0.04],
  83                Util.makeNumbers(Util.getYLabels()));
  84
  85   opts.valueRange = [-0.01, 0.01];
  86   g.updateOptions(opts);
  87   assertEquals([-0.01, -8.00e-3, -6.00e-3, -4.00e-3, -2.00e-3, 0, 2.00e-3, 4.00e-3, 6.00e-3, 8.00e-3],
  88                Util.makeNumbers(Util.getYLabels()));
  89
  90   g.setSelection(1);
  91   assertEquals('1: Y: 0', Util.getLegend());
  92 };
  93
  94 AxisLabelsTestCase.prototype.testSmallRangeAwayFromZero = function() {
  95   var opts = {
  96     width: 480,
  97     height: 320
  98   };
  99   var data = "X,Y\n" +
 100       "0,-1\n" +
 101       "1,0\n" +
 102       "2,1\n" +
 103       "3,0\n"
 104   ;
 105   var graph = document.getElementById("graph");
 106
 107   opts.valueRange = [9.9, 10.1];
 108   var g = new Dygraph(graph, data, opts);
 109   assertEquals(["9.9","9.92","9.94","9.96","9.98","10","10.02","10.04","10.06","10.08"], Util.getYLabels());
 110
 111   opts.valueRange = [9.99, 10.01];
 112   g.updateOptions(opts);
 113   // TODO(danvk): this is bad
 114   assertEquals(["9.99","9.99","9.99","10","10","10","10","10","10.01","10.01"], Util.getYLabels());
 115
 116   opts.valueRange = [9.999, 10.001];
 117   g.updateOptions(opts);
 118   // TODO(danvk): this is even worse!
 119   assertEquals(["10","10","10","10","10","10","10","10","10","10"], Util.getYLabels());
 120
 121   g.setSelection(1);
 122   assertEquals('1: Y: 0', Util.getLegend());
 123 };
 124
 125 AxisLabelsTestCase.prototype.testXAxisTimeLabelFormatter = function() {
 126   var opts = {
 127     width: 480,
 128     height: 320
 129   };
 130   var data = [[5.0,0],[5.1,1],[5.2,2],[5.3,3],[5.4,4],[5.5,5],[5.6,6],[5.7,7],[5.8,8],[5.9,9]];
 131   var graph = document.getElementById("graph");
 132   var g = new Dygraph(graph, data, opts);
 133   g.updateOptions({
 134     axes : {
 135       x : {
 136         axisLabelFormatter : function (totalMinutes) {
 137           var hours   = Math.floor( totalMinutes / 60);
 138           var minutes = Math.floor((totalMinutes - (hours * 60)));
 139           var seconds = Math.round((totalMinutes * 60) - (hours * 3600) - (minutes * 60));
 140
 141           if (hours   < 10) hours   = "0" + hours;
 142           if (minutes < 10) minutes = "0" + minutes;
 143           if (seconds < 10) seconds = "0" + seconds;
 144
 145           return hours + ':' + minutes + ':' + seconds;
 146         }
 147       }
 148     }
 149   });
 150
 151   assertEquals(["00:05:00","00:05:12","00:05:24","00:05:36","00:05:48"], Util.getXLabels());
 152
 153   // The legend does not use the axisLabelFormatter:
 154   g.setSelection(1);
 155   assertEquals('5.1: Y1: 1', Util.getLegend());
 156 };
 157
 158 AxisLabelsTestCase.prototype.testAxisLabelFormatter = function () {
 159   var opts = {
 160     width: 480,
 161     height: 320,
 162     axes : {
 163       x : {
 164         axisLabelFormatter : function(x, granularity, opts, dg) {
 165           assertEquals('number', typeof(x));
 166           assertEquals('number', typeof(granularity));
 167           assertEquals('function', typeof(opts));
 168           assertEquals('[Dygraph graph]', dg.toString());
 169           return 'x' + x;
 170         }
 171       },
 172       y : {
 173         axisLabelFormatter : function(y, granularity, opts, dg) {
 174           assertEquals('number', typeof(y));
 175           assertEquals('number', typeof(granularity));
 176           assertEquals('function', typeof(opts));
 177           assertEquals('[Dygraph graph]', dg.toString());
 178           return 'y' + y;
 179         }
 180       }
 181     },
 182     labels: ['x', 'y']
 183   };
 184   var data = [];
 185   for (var i = 0; i < 10; i++) {
 186     data.push([i, 2 * i]);
 187   }
 188   var graph = document.getElementById("graph");
 189   var g = new Dygraph(graph, data, opts);
 190
 191   assertEquals(['x0','x2','x4','x6','x8'], Util.getXLabels());
 192   assertEquals(['y0','y2','y4','y6','y8','y10','y12','y14','y16','y18'], Util.getYLabels());
 193
 194   g.setSelection(2);
 195   assertEquals("2: y: 4", Util.getLegend());
 196 };
 197
 198 AxisLabelsTestCase.prototype.testDateAxisLabelFormatter = function () {
 199   var opts = {
 200     width: 480,
 201     height: 320,
 202     axes : {
 203       x : {
 204         axisLabelFormatter : function(x, granularity, opts, dg) {
 205           assertTrue(Dygraph.isDateLike(x));
 206           assertEquals('number', typeof(granularity));
 207           assertEquals('function', typeof(opts));
 208           assertEquals('[Dygraph graph]', dg.toString());
 209           return 'x' + x.strftime('%Y/%m/%d');
 210         }
 211       },
 212       y : {
 213         axisLabelFormatter : function(y, granularity, opts, dg) {
 214           assertEquals('number', typeof(y));
 215           assertEquals('number', typeof(granularity));
 216           assertEquals('function', typeof(opts));
 217           assertEquals('[Dygraph graph]', dg.toString());
 218           return 'y' + y;
 219         }
 220       }
 221     },
 222     labels: ['x', 'y']
 223   };
 224   var data = [];
 225   for (var i = 1; i < 10; i++) {
 226     data.push([new Date("2011/01/0" + i), 2 * i]);
 227   }
 228   var graph = document.getElementById("graph");
 229   var g = new Dygraph(graph, data, opts);
 230
 231   assertEquals(["x2011/01/01", "x2011/01/02", "x2011/01/03", "x2011/01/04", "x2011/01/05", "x2011/01/06", "x2011/01/07", "x2011/01/08", "x2011/01/09"], Util.getXLabels());
 232   assertEquals(['y2','y4','y6','y8','y10','y12','y14','y16','y18'], Util.getYLabels());
 233
 234   g.setSelection(0);
 235   assertEquals("2011/01/01: y: 2", Util.getLegend());
 236 };
 237
 238 // This test verifies that when a valueFormatter is set (but not an
 239 // axisLabelFormatter), then the valueFormatter is used to format the axis
 240 // labels.
 241 AxisLabelsTestCase.prototype.testValueFormatter = function () {
 242   var opts = {
 243     width: 480,
 244     height: 320,
 245     axes : {
 246       x : {
 247         valueFormatter: function(x, opts, series_name, dg) {
 248           assertEquals('number', typeof(x));
 249           assertEquals('function', typeof(opts));
 250           assertEquals('string', typeof(series_name));
 251           assertEquals('[Dygraph graph]', dg.toString());
 252           return 'x' + x;
 253         }
 254       },
 255       y : {
 256         valueFormatter: function(y, opts, series_name, dg) {
 257           assertEquals('number', typeof(y));
 258           assertEquals('function', typeof(opts));
 259           assertEquals('string', typeof(series_name));
 260           assertEquals('[Dygraph graph]', dg.toString());
 261           return 'y' + y;
 262         }
 263       }
 264     },
 265     labels: ['x', 'y']
 266   };
 267   var data = [];
 268   for (var i = 0; i < 10; i++) {
 269     data.push([i, 2 * i]);
 270   }
 271   var graph = document.getElementById("graph");
 272   var g = new Dygraph(graph, data, opts);
 273
 274   // the valueFormatter options do not affect the ticks.
 275   assertEquals(['0','2','4','6','8'], Util.getXLabels());
 276   assertEquals(['0','2','4','6','8','10','12','14','16','18'],
 277                Util.getYLabels());
 278
 279   // they do affect the legend, however.
 280   g.setSelection(2);
 281   assertEquals("x2: y: y4", Util.getLegend());
 282 };
 283
 284 AxisLabelsTestCase.prototype.testDateValueFormatter = function () {
 285   var opts = {
 286     width: 480,
 287     height: 320,
 288     axes : {
 289       x : {
 290         valueFormatter: function(x, opts, series_name, dg) {
 291           assertEquals('number', typeof(x));
 292           assertEquals('function', typeof(opts));
 293           assertEquals('string', typeof(series_name));
 294           assertEquals('[Dygraph graph]', dg.toString());
 295           return 'x' + new Date(x).strftime('%Y/%m/%d');
 296         }
 297       },
 298       y : {
 299         valueFormatter: function(y, opts, series_name, dg) {
 300           assertEquals('number', typeof(y));
 301           assertEquals('function', typeof(opts));
 302           assertEquals('string', typeof(series_name));
 303           assertEquals('[Dygraph graph]', dg.toString());
 304           return 'y' + y;
 305         }
 306       }
 307     },
 308     labels: ['x', 'y']
 309   };
 310
 311   var data = [];
 312   for (var i = 1; i < 10; i++) {
 313     data.push([new Date("2011/01/0" + i), 2 * i]);
 314   }
 315   var graph = document.getElementById("graph");
 316   var g = new Dygraph(graph, data, opts);
 317
 318   // valueFormatters do not affect ticks.
 319   assertEquals(['01Jan','02Jan','03Jan','04Jan','05Jan','06Jan','07Jan','08Jan','09Jan'], Util.getXLabels());
 320   assertEquals(['2','4','6','8','10','12','14','16','18'], Util.getYLabels());
 321
 322   // the valueFormatter options also affect the legend.
 323   g.setSelection(2);
 324   assertEquals('x2011/01/03: y: y6', Util.getLegend());
 325 };
 326
 327 // This test verifies that when both a valueFormatter and an axisLabelFormatter
 328 // are specified, the axisLabelFormatter takes precedence.
 329 AxisLabelsTestCase.prototype.testAxisLabelFormatterPrecedence = function () {
 330   var opts = {
 331     width: 480,
 332     height: 320,
 333     axes : {
 334       x : {
 335         valueFormatter: function(x) {
 336           return 'xvf' + x;
 337         },
 338         axisLabelFormatter: function(x, granularity) {
 339           return 'x' + x;
 340         }
 341       },
 342       y : {
 343         valueFormatter: function(y) {
 344           return 'yvf' + y;
 345         },
 346         axisLabelFormatter: function(y) {
 347           return 'y' + y;
 348         }
 349       }
 350     },
 351     labels: ['x', 'y']
 352   };
 353   var data = [];
 354   for (var i = 0; i < 10; i++) {
 355     data.push([i, 2 * i]);
 356   }
 357   var graph = document.getElementById("graph");
 358   var g = new Dygraph(graph, data, opts);
 359
 360   assertEquals(['x0','x2','x4','x6','x8'], Util.getXLabels());
 361   assertEquals(['y0','y2','y4','y6','y8','y10','y12','y14','y16','y18'], Util.getYLabels());
 362
 363   g.setSelection(9);
 364   assertEquals("xvf9: y: yvf18", Util.getLegend());
 365 };
 366
 367 // This is the same as the previous test, except that options are added
 368 // one-by-one.
 369 AxisLabelsTestCase.prototype.testAxisLabelFormatterIncremental = function () {
 370   var opts = {
 371     width: 480,
 372     height: 320,
 373     labels: ['x', 'y']
 374   };
 375   var data = [];
 376   for (var i = 0; i < 10; i++) {
 377     data.push([i, 2 * i]);
 378   }
 379   var graph = document.getElementById("graph");
 380   var g = new Dygraph(graph, data, opts);
 381   g.updateOptions({
 382     axes : {
 383       x : {
 384         valueFormatter: function(x) {
 385           return 'xvf' + x;
 386         }
 387       }
 388     }
 389   });
 390   g.updateOptions({
 391     axes : {
 392       y : {
 393         valueFormatter: function(y) {
 394           return 'yvf' + y;
 395         }
 396       }
 397     }
 398   });
 399   g.updateOptions({
 400     axes : {
 401       x : {
 402         axisLabelFormatter: function(x, granularity) {
 403           return 'x' + x;
 404         }
 405       }
 406     }
 407   });
 408   g.updateOptions({
 409     axes : {
 410       y : {
 411         axisLabelFormatter: function(y) {
 412           return 'y' + y;
 413         }
 414       }
 415     }
 416   });
 417
 418   assertEquals(["x0","x2","x4","x6","x8"], Util.getXLabels());
 419   assertEquals(['y0','y2','y4','y6','y8','y10','y12','y14','y16','y18'], Util.getYLabels());
 420
 421   g.setSelection(9);
 422   assertEquals("xvf9: y: yvf18", Util.getLegend());
 423 };
 424
 425 AxisLabelsTestCase.prototype.testGlobalFormatters = function() {
 426   var opts = {
 427     width: 480,
 428     height: 320,
 429     labels: ['x', 'y'],
 430     valueFormatter: function(x) {
 431       return 'vf' + x;
 432     },
 433     axisLabelFormatter: function(x) {
 434       return 'alf' + x;
 435     }
 436   };
 437   var data = [];
 438   for (var i = 0; i < 10; i++) {
 439     data.push([i, 2 * i]);
 440   }
 441   var graph = document.getElementById("graph");
 442   var g = new Dygraph(graph, data, opts);
 443
 444   assertEquals(['alf0','alf2','alf4','alf6','alf8'], Util.getXLabels());
 445   assertEquals(['alf0','alf2','alf4','alf6','alf8','alf10','alf12','alf14','alf16','alf18'], Util.getYLabels());
 446
 447   g.setSelection(9);
 448   assertEquals("vf9: y: vf18", Util.getLegend());
 449 };
 450
 451 AxisLabelsTestCase.prototype.testSeriesOrder = function() {
 452   var opts = {
 453     width: 480,
 454     height: 320
 455   };
 456   var data = "x,00,01,10,11\n" +
 457       "0,101,201,301,401\n" +
 458       "1,102,202,302,402\n" +
 459       "2,103,203,303,403\n" +
 460       "3,104,204,304,404\n"
 461   ;
 462
 463   var graph = document.getElementById("graph");
 464   var g = new Dygraph(graph, data, opts);
 465
 466   g.setSelection(2);
 467   assertEquals('2: 00: 103 01: 203 10: 303 11: 403', Util.getLegend());
 468
 469   // Sanity checks for indexFromSetName
 470   assertEquals(0, g.indexFromSetName("x"));
 471   assertEquals(1, g.indexFromSetName("00"));
 472   assertEquals(null, g.indexFromSetName("abcde"));
 473
 474   // Verify that we get the label list back in the right order
 475   assertEquals(["x", "00", "01", "10", "11"], g.getLabels());
 476 };
 477
 478 AxisLabelsTestCase.prototype.testLabelKMB = function() {
 479   var data = [];
 480   data.push([0,0]);
 481   data.push([1,2000]);
 482   data.push([2,1000]);
 483
 484   var g = new Dygraph(
 485     document.getElementById("graph"),
 486     data,
 487     {
 488       labels: [ 'X', 'bar' ],
 489       axes : {
 490         y: {
 491           labelsKMB: true
 492         }
 493       }
 494     }
 495   );
 496
 497   assertEquals(["0", "500", "1K", "1.5K", "2K"], Util.getYLabels());
 498 };
 499
 500 AxisLabelsTestCase.prototype.testLabelKMG2 = function() {
 501   var data = [];
 502   data.push([0,0]);
 503   data.push([1,2000]);
 504   data.push([2,1000]);
 505
 506   var g = new Dygraph(
 507     document.getElementById("graph"),
 508     data,
 509     {
 510       labels: [ 'X', 'bar' ],
 511       axes : {
 512         y: {
 513           labelsKMG2: true
 514         }
 515       }
 516     }
 517   );
 518
 519   assertEquals(
 520       ["0","256","512","768","1k","1.25k","1.5k","1.75k","2k"],
 521       Util.getYLabels());
 522 };
 523
 524 // Same sa testLabelKMG2 but specifies the option at the
 525 // top of the option dictionary.
 526 AxisLabelsTestCase.prototype.testLabelKMG2_top = function() {
 527   var data = [];
 528   data.push([0,0]);
 529   data.push([1,2000]);
 530   data.push([2,1000]);
 531
 532   var g = new Dygraph(
 533     document.getElementById("graph"),
 534     data,
 535     {
 536       labels: [ 'X', 'bar' ],
 537       labelsKMG2: true
 538     }
 539   );
 540
 541   assertEquals(
 542       ["0","256","512","768","1k","1.25k","1.5k","1.75k","2k"],
 543       Util.getYLabels());
 544 };
 545
 546 /**
 547  * Verify that log scale axis range is properly specified.
 548  */
 549 AxisLabelsTestCase.prototype.testLogScale = function() {
 550   var g = new Dygraph("graph", [[0, 5], [1, 1000]], { logscale : true });
 551   var nonEmptyLabels = Util.getYLabels().filter(function(x) { return x.length > 0; });
 552   assertEquals(["6","10","30","60","100","300","600","1000"], nonEmptyLabels);
 553
 554   g.updateOptions({ logscale : false });
 555   assertEquals(['0','200','400','600','800','1000'], Util.getYLabels());
 556 }
 557
 558 /**
 559  * Verify that include zero range is properly specified.
 560  */
 561 AxisLabelsTestCase.prototype.testIncludeZero = function() {
 562   var g = new Dygraph("graph", [[0, 500], [1, 1000]], { includeZero : true });
 563   assertEquals(['0','200','400','600','800','1000'], Util.getYLabels());
 564
 565   g.updateOptions({ includeZero : false });
 566   assertEquals(['500','600','700','800','900','1000'], Util.getYLabels());
 567 }
 568
 569 AxisLabelsTestCase.prototype.testAxisLabelFontSize = function() {
 570   var graph = document.getElementById("graph");
 571   var g = new Dygraph(graph, AxisLabelsTestCase.simpleData, {});
 572
 573   // Be sure we're dealing with a 14-point default.
 574   assertEquals(14, Dygraph.DEFAULT_ATTRS.axisLabelFontSize);
 575
 576   var assertFontSize = function(selector, expected) {
 577     Util.assertStyleOfChildren(selector, "font-size", expected);
 578   }
 579
 580   assertFontSize($(".dygraph-axis-label-x"), "14px");
 581   assertFontSize($(".dygraph-axis-label-y") , "14px");
 582
 583   g.updateOptions({ axisLabelFontSize : 8});
 584   assertFontSize($(".dygraph-axis-label-x"), "8px");
 585   assertFontSize($(".dygraph-axis-label-y"), "8px");
 586
 587   g.updateOptions({
 588     axisLabelFontSize : null,
 589     axes : {
 590       x : { axisLabelFontSize : 5 },
 591     }
 592   });
 593
 594   assertFontSize($(".dygraph-axis-label-x"), "5px");
 595   assertFontSize($(".dygraph-axis-label-y"), "14px");
 596
 597   g.updateOptions({
 598     axes : {
 599       y : { axisLabelFontSize : 20 },
 600     }
 601   });
 602
 603   assertFontSize($(".dygraph-axis-label-x"), "5px");
 604   assertFontSize($(".dygraph-axis-label-y"), "20px");
 605
 606   g.updateOptions({
 607     series : {
 608       Y2 : { axis : "y2" } // copy y2 series to y2 axis.
 609     },
 610     axes : {
 611       y2 : { axisLabelFontSize : 12 },
 612     }
 613   });
 614
 615   assertFontSize($(".dygraph-axis-label-x"), "5px");
 616   assertFontSize($(".dygraph-axis-label-y1"), "20px");
 617   assertFontSize($(".dygraph-axis-label-y2"), "12px");
 618 }
 619
 620 AxisLabelsTestCase.prototype.testAxisLabelFontSizeNull = function() {
 621   var graph = document.getElementById("graph");
 622   var g = new Dygraph(graph, AxisLabelsTestCase.simpleData,
 623     {
 624       axisLabelFontSize: null
 625     });
 626
 627   var assertFontSize = function(selector, expected) {
 628     Util.assertStyleOfChildren(selector, "font-size", expected);
 629   };
 630
 631   // Be sure we're dealing with a 14-point default.
 632   assertEquals(14, Dygraph.DEFAULT_ATTRS.axisLabelFontSize);
 633
 634   assertFontSize($(".dygraph-axis-label-x"), "14px");
 635   assertFontSize($(".dygraph-axis-label-y"), "14px");
 636 }
 637
 638 AxisLabelsTestCase.prototype.testAxisLabelColor = function() {
 639   var graph = document.getElementById("graph");
 640   var g = new Dygraph(graph, AxisLabelsTestCase.simpleData, {});
 641
 642   // Be sure we're dealing with a black default.
 643   assertEquals("black", Dygraph.DEFAULT_ATTRS.axisLabelColor);
 644
 645   var assertColor = function(selector, expected) {
 646     Util.assertStyleOfChildren(selector, "color", expected);
 647   }
 648
 649   assertColor($(".dygraph-axis-label-x"), "rgb(0, 0, 0)");
 650   assertColor($(".dygraph-axis-label-y"), "rgb(0, 0, 0)");
 651
 652   g.updateOptions({ axisLabelColor : "red"});
 653   assertColor($(".dygraph-axis-label-x"), "rgb(255, 0, 0)");
 654   assertColor($(".dygraph-axis-label-y"), "rgb(255, 0, 0)");
 655
 656   g.updateOptions({
 657     axisLabelColor : null,
 658     axes : {
 659       x : { axisLabelColor : "blue" },
 660     }
 661   });
 662
 663   assertColor($(".dygraph-axis-label-x"), "rgb(0, 0, 255)");
 664   assertColor($(".dygraph-axis-label-y"), "rgb(0, 0, 0)");
 665
 666   g.updateOptions({
 667     axes : {
 668       y : { axisLabelColor : "green" },
 669     }
 670   });
 671
 672   assertColor($(".dygraph-axis-label-x"), "rgb(0, 0, 255)");
 673   assertColor($(".dygraph-axis-label-y"), "rgb(0, 128, 0)");
 674
 675   g.updateOptions({
 676     series : {
 677       Y2 : { axis : "y2" } // copy y2 series to y2 axis.
 678     },
 679     axes : {
 680       y2 : { axisLabelColor : "yellow" },
 681     }
 682   });
 683
 684   assertColor($(".dygraph-axis-label-x"), "rgb(0, 0, 255)");
 685   assertColor($(".dygraph-axis-label-y1"), "rgb(0, 128, 0)");
 686   assertColor($(".dygraph-axis-label-y2"), "rgb(255, 255, 0)");
 687 }
 688
 689 AxisLabelsTestCase.prototype.testAxisLabelColorNull = function() {
 690   var graph = document.getElementById("graph");
 691   var g = new Dygraph(graph, AxisLabelsTestCase.simpleData,
 692     {
 693       axisLabelColor: null
 694     });
 695
 696   var assertColor = function(selector, expected) {
 697     Util.assertStyleOfChildren(selector, "color", expected);
 698   }
 699
 700   // Be sure we're dealing with a 14-point default.
 701   assertEquals(14, Dygraph.DEFAULT_ATTRS.axisLabelFontSize);
 702
 703   assertColor($(".dygraph-axis-label-x"), "rgb(0, 0, 0)");
 704   assertColor($(".dygraph-axis-label-y"), "rgb(0, 0, 0)");
 705 }
 706
 707 /*
 708  * This test shows that the label formatter overrides labelsKMB for all values.
 709  */
 710 AxisLabelsTestCase.prototype.testLabelFormatterOverridesLabelsKMB = function() {
 711   var g = new Dygraph(
 712       document.getElementById("graph"),
 713       "X,a,b\n" +
 714       "1,0,2000\n" +
 715       "2,500,1500\n" +
 716       "3,1000,1000\n" +
 717       "4,2000,0\n", {
 718         labelsKMB: true,
 719         axisLabelFormatter: function (v) {
 720           return v + ":X";
 721         }
 722       });
 723   assertEquals(["0:X","500:X","1000:X","1500:X","2000:X"], Util.getYLabels());
 724   assertEquals(["1:X","1.5:X","2:X","2.5:X","3:X","3.5:X"], Util.getXLabels());
 725 }
 726
 727 /*
 728  * This test shows that you can override labelsKMB on the axis level.
 729  */
 730 AxisLabelsTestCase.prototype.testLabelsKMBIgnoredWhenOverridden = function() {
 731   var g = new Dygraph(
 732       document.getElementById("graph"),
 733       "x,a,b\n" +
 734       "1,0,2000\n" +
 735       "2,500,1500\n" +
 736       "3,1000,1000\n" +
 737       "4,2000,0\n", {
 738         labelsKMB: true,
 739         axes: {
 740           y2: {
 741             labelsKMB: false
 742           }
 743         },
 744         series: {
 745           b: {
 746             axis: "y2"
 747           },
 748         }
 749       });
 750   assertEquals(["0","500","1K","1.5K","2K"], Util.getYLabels(1));
 751   assertEquals(["0","500","1000","1500","2000"], Util.getYLabels(2));
 752 };
 753
 754 // Regression test for http://code.google.com/p/dygraphs/issues/detail?id=147
 755 // Checks that axis labels stay sane across a DST change.
 756 AxisLabelsTestCase.prototype.testLabelsCrossDstChange = function() {
 757   // (From tests/daylight-savings.html)
 758   var g = new Dygraph(
 759       document.getElementById("graph"),
 760       "Date/Time,Purchases\n" +
 761       "2010-11-05 00:00:00,167082\n" +
 762       "2010-11-06 00:00:00,168571\n" +
 763       "2010-11-07 00:00:00,177796\n" +
 764       "2010-11-08 00:00:00,165587\n" +
 765       "2010-11-09 00:00:00,164380\n",
 766       { width: 1024 }
 767       );
 768
 769   // Dates and "nice" hours: 6AM/PM and noon, not 5AM/11AM/...
 770   var okLabels = {
 771     '05Nov': true,
 772     '06Nov': true,
 773     '07Nov': true,
 774     '08Nov': true,
 775     '09Nov': true,
 776     '06:00': true,
 777     '12:00': true,
 778     '18:00': true
 779   };
 780
 781   var xLabels = Util.getXLabels();
 782   for (var i = 0; i < xLabels.length; i++) {
 783     assertTrue(okLabels[xLabels[i]]);
 784   }
 785
 786   // This range had issues of its own on tests/daylight-savings.html.
 787   g.updateOptions({
 788     dateWindow: [1289109997722.8127, 1289261208937.7659]
 789   });
 790   xLabels = Util.getXLabels();
 791   for (var i = 0; i < xLabels.length; i++) {
 792     assertTrue(okLabels[xLabels[i]]);
 793   }
 794 };
 795
 796
 797 // Tests data which crosses a "fall back" at a high enough frequency that you
 798 // can see both 1:00 A.M.s.
 799 AxisLabelsTestCase.prototype.testLabelsCrossDstChangeHighFreq = function() {
 800   // Generate data which crosses the EST/EDT boundary.
 801   var dst_data = [];
 802   var base_ms = 1383454200000;
 803   for (var x = base_ms; x < base_ms + 1000 * 60 * 80; x += 1000) {
 804     dst_data.push([new Date(x), x]);
 805   }
 806
 807   var g = new Dygraph(
 808           document.getElementById("graph"),
 809           dst_data,
 810       { width: 1024, labels: ['Date', 'Value'] }
 811       );
 812
 813   assertEquals([
 814     '00:50', '00:55',
 815     '01:00', '01:05', '01:10', '01:15', '01:20', '01:25',
 816     '01:30', '01:35', '01:40', '01:45', '01:50', '01:55',
 817     '01:00', '01:05'  // 1 AM number two!
 818   ], Util.getXLabels());
 819
 820   // Now zoom past the initial 1 AM. This used to cause trouble.
 821   g.updateOptions({
 822     dateWindow: [1383454200000 + 15*60*1000, g.xAxisExtremes()[1]]}
 823   );
 824   assertEquals([
 825     '01:05', '01:10', '01:15', '01:20', '01:25',
 826     '01:30', '01:35', '01:40', '01:45', '01:50', '01:55',
 827     '01:00', '01:05'  // 1 AM number two!
 828   ], Util.getXLabels());
 829 };
 830
 831
 832 // Tests data which crosses a "spring forward" at a low frequency.
 833 // Regression test for http://code.google.com/p/dygraphs/issues/detail?id=433
 834 AxisLabelsTestCase.prototype.testLabelsCrossSpringForward = function() {
 835   var g = new Dygraph(
 836       document.getElementById("graph"),
 837       "Date/Time,Purchases\n" +
 838       "2011-03-11 00:00:00,167082\n" +
 839       "2011-03-12 00:00:00,168571\n" +
 840       "2011-03-13 00:00:00,177796\n" +
 841       "2011-03-14 00:00:00,165587\n" +
 842       "2011-03-15 00:00:00,164380\n",
 843       {
 844         width: 1024,
 845         dateWindow: [1299989043119.4365, 1300080693627.4866]
 846       });
 847
 848   var okLabels = {
 849     '13Mar': true,
 850     // '02:00': true,  // not a real time!
 851     '04:00': true,
 852     '06:00': true,
 853     '08:00': true,
 854     '10:00': true,
 855     '12:00': true,
 856     '14:00': true,
 857     '16:00': true,
 858     '18:00': true,
 859     '20:00': true,
 860     '22:00': true,
 861     '14Mar': true
 862   };
 863
 864   var xLabels = Util.getXLabels();
 865   for (var i = 0; i < xLabels.length; i++) {
 866     assertTrue(okLabels[xLabels[i]]);
 867   }
 868 };
 869
 870 AxisLabelsTestCase.prototype.testLabelsCrossSpringForwardHighFreq = function() {
 871   var base_ms_spring = 1299999000000;
 872   var dst_data_spring = [];
 873   for (var x = base_ms_spring; x < base_ms_spring + 1000 * 60 * 80; x += 1000) {
 874     dst_data_spring.push([new Date(x), x]);
 875   }
 876
 877   var g = new Dygraph(
 878       document.getElementById("graph"),
 879       dst_data_spring,
 880       { width: 1024, labels: ['Date', 'Value'] }
 881   );
 882
 883   assertEquals([
 884     '01:50', '01:55',
 885     '03:00', '03:05', '03:10', '03:15', '03:20', '03:25',
 886     '03:30', '03:35', '03:40', '03:45', '03:50', '03:55',
 887     '04:00', '04:05'
 888   ], Util.getXLabels());
 889 };