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
   7 import Dygraph from '../../src/dygraph';
   8 import * as utils from '../../src/dygraph-utils';
   9 import DEFAULT_ATTRS from '../../src/dygraph-default-attrs';
  10 import Util from './Util';
  11 import {assertDeepCloseTo} from './custom_asserts';
  12
  13 describe("axis-labels", function() {
  14
  15 cleanupAfterEach();
  16
  17 var simpleData =
  18     "X,Y,Y2\n" +
  19     "0,-1,.5\n" +
  20     "1,0,.7\n" +
  21     "2,1,.4\n" +
  22     "3,0,.98\n";
  23
  24 var kCloseFloat = 1.0e-10;
  25
  26 it('testMinusOneToOne', function() {
  27   var opts = {
  28     width: 480,
  29     height: 320
  30   };
  31   var data = "X,Y\n" +
  32       "0,-1\n" +
  33       "1,0\n" +
  34       "2,1\n" +
  35       "3,0\n"
  36   ;
  37
  38   var graph = document.getElementById("graph");
  39   var g = new Dygraph(graph, data, opts);
  40
  41   // TODO(danvk): would ['-1.0','-0.5','0.0','0.5','1.0'] be better?
  42   assert.deepEqual(['-1','-0.5','0','0.5','1'], Util.getYLabels());
  43
  44   // Go up to 2
  45   data += "4,2\n";
  46   g.updateOptions({file: data});
  47   assert.deepEqual(['-1','-0.5','0','0.5','1','1.5','2'], Util.getYLabels());
  48
  49   // Now 10
  50   data += "5,10\n";
  51   g.updateOptions({file: data});
  52   assert.deepEqual(['-2','0','2','4','6','8','10'], Util.getYLabels());
  53
  54   // Now 100
  55   data += "6,100\n";
  56   g.updateOptions({file: data});
  57   assert.deepEqual(['0','20','40','60','80','100'], Util.getYLabels());
  58
  59   g.setSelection(0);
  60   assert.equal('0: Y: -1', Util.getLegend());
  61 });
  62
  63 it('testSmallRangeNearZero', function() {
  64   var opts = {
  65     drawAxesAtZero: true,
  66     width: 480,
  67     height: 320
  68   };
  69   var data = "X,Y\n" +
  70       "0,-1\n" +
  71       "1,0\n" +
  72       "2,1\n" +
  73       "3,0\n"
  74   ;
  75   opts.valueRange = [-0.1, 0.1];
  76
  77   var graph = document.getElementById("graph");
  78   var g = new Dygraph(graph, data, opts);
  79   assertDeepCloseTo([-0.1,-0.05,0,0.05],
  80                     Util.makeNumbers(Util.getYLabels()), kCloseFloat);
  81
  82   opts.valueRange = [-0.05, 0.05];
  83   g.updateOptions(opts);
  84   assert.deepEqual([-0.04,-0.02,0,0.02,0.04],
  85                    Util.makeNumbers(Util.getYLabels()));
  86
  87   opts.valueRange = [-0.01, 0.01];
  88   g.updateOptions(opts);
  89   assert.deepEqual([-0.01,-0.005,0,0.005],
  90                    Util.makeNumbers(Util.getYLabels()));
  91
  92   g.setSelection(1);
  93   assert.equal('1: Y: 0', Util.getLegend());
  94 });
  95
  96 it('testSmallRangeAwayFromZero', function() {
  97   var opts = {
  98     width: 480,
  99     height: 320
 100   };
 101   var data = "X,Y\n" +
 102       "0,-1\n" +
 103       "1,0\n" +
 104       "2,1\n" +
 105       "3,0\n"
 106   ;
 107   var graph = document.getElementById("graph");
 108
 109   opts.valueRange = [9.9, 10.1];
 110   var g = new Dygraph(graph, data, opts);
 111   assert.deepEqual(["9.9","9.92","9.94","9.96","9.98","10","10.02","10.04","10.06","10.08"], Util.getYLabels());
 112
 113   opts.valueRange = [9.99, 10.01];
 114   g.updateOptions(opts);
 115   // TODO(danvk): this is bad
 116   assert.deepEqual(["9.99","9.99","9.99","10","10","10","10","10","10.01","10.01"], Util.getYLabels());
 117
 118   opts.valueRange = [9.999, 10.001];
 119   g.updateOptions(opts);
 120   // TODO(danvk): this is even worse!
 121   assert.deepEqual(["10","10","10","10"], Util.getYLabels());
 122
 123   g.setSelection(1);
 124   assert.equal('1: Y: 0', Util.getLegend());
 125 });
 126
 127 it('testXAxisTimeLabelFormatter', function() {
 128   var opts = {
 129     width: 480,
 130     height: 320,
 131     labels: ['X', 'Y1']
 132   };
 133   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]];
 134   var graph = document.getElementById("graph");
 135   var g = new Dygraph(graph, data, opts);
 136   g.updateOptions({
 137     axes : {
 138       x : {
 139         axisLabelFormatter : function (totalMinutes) {
 140           var hours   = Math.floor( totalMinutes / 60);
 141           var minutes = Math.floor((totalMinutes - (hours * 60)));
 142           var seconds = Math.round((totalMinutes * 60) - (hours * 3600) - (minutes * 60));
 143
 144           if (hours   < 10) hours   = "0" + hours;
 145           if (minutes < 10) minutes = "0" + minutes;
 146           if (seconds < 10) seconds = "0" + seconds;
 147
 148           return hours + ':' + minutes + ':' + seconds;
 149         }
 150       }
 151     }
 152   });
 153
 154   assert.deepEqual(["00:05:00","00:05:12","00:05:24","00:05:36","00:05:48"], Util.getXLabels());
 155
 156   // The legend does not use the axisLabelFormatter:
 157   g.setSelection(1);
 158   assert.equal('5.1: Y1: 1', Util.getLegend());
 159 });
 160
 161 it('testAxisLabelFormatter', function() {
 162   var opts = {
 163     width: 480,
 164     height: 320,
 165     axes : {
 166       x : {
 167         axisLabelFormatter : function(x, granularity, opts, dg) {
 168           assert.equal('number', typeof(x));
 169           assert.equal('number', typeof(granularity));
 170           assert.equal('function', typeof(opts));
 171           assert.equal('[Dygraph graph]', dg.toString());
 172           return 'x' + x;
 173         }
 174       },
 175       y : {
 176         axisLabelFormatter : function(y, granularity, opts, dg) {
 177           assert.equal('number', typeof(y));
 178           assert.equal('number', typeof(granularity));
 179           assert.equal('function', typeof(opts));
 180           assert.equal('[Dygraph graph]', dg.toString());
 181           return 'y' + y;
 182         }
 183       }
 184     },
 185     labels: ['x', 'y']
 186   };
 187   var data = [];
 188   for (var i = 0; i < 10; i++) {
 189     data.push([i, 2 * i]);
 190   }
 191   var graph = document.getElementById("graph");
 192   var g = new Dygraph(graph, data, opts);
 193
 194   assert.deepEqual(['x0','x2','x4','x6','x8'], Util.getXLabels());
 195   assert.deepEqual(["y0","y5","y10","y15"], Util.getYLabels());
 196
 197   g.setSelection(2);
 198   assert.equal("2: y: 4", Util.getLegend());
 199 });
 200
 201 it('testDateAxisLabelFormatter', function() {
 202   var opts = {
 203     width: 480,
 204     height: 320,
 205     axes : {
 206       x : {
 207         pixelsPerLabel: 60,
 208         axisLabelFormatter : function(x, granularity, opts, dg) {
 209           assert.isTrue(utils.isDateLike(x));
 210           assert.equal('number', typeof(granularity));
 211           assert.equal('function', typeof(opts));
 212           assert.equal('[Dygraph graph]', dg.toString());
 213           return 'x' + Util.formatDate(x);
 214         }
 215       },
 216       y : {
 217         axisLabelFormatter : function(y, granularity, opts, dg) {
 218           assert.equal('number', typeof(y));
 219           assert.equal('number', typeof(granularity));
 220           assert.equal('function', typeof(opts));
 221           assert.equal('[Dygraph graph]', dg.toString());
 222           return 'y' + y;
 223         }
 224       }
 225     },
 226     labels: ['x', 'y']
 227   };
 228   var data = [];
 229   for (var i = 1; i < 10; i++) {
 230     data.push([new Date("2011/01/0" + i), 2 * i]);
 231   }
 232   var graph = document.getElementById("graph");
 233   var g = new Dygraph(graph, data, opts);
 234
 235   assert.deepEqual(["x2011/01/02","x2011/01/04","x2011/01/06","x2011/01/08"], Util.getXLabels());
 236   assert.deepEqual(["y5","y10","y15"], Util.getYLabels());
 237
 238   g.setSelection(0);
 239   assert.equal("2011/01/01: y: 2", Util.getLegend());
 240 });
 241
 242 // This test verifies that when a valueFormatter is set (but not an
 243 // axisLabelFormatter), then the valueFormatter is used to format the axis
 244 // labels.
 245 it('testValueFormatter', function() {
 246   var opts = {
 247     width: 480,
 248     height: 320,
 249     axes: {
 250       x: {
 251         valueFormatter: function(x, opts, series_name, dg, row, col) {
 252           assert.equal('number', typeof(x));
 253           assert.equal('function', typeof(opts));
 254           assert.equal('string', typeof(series_name));
 255           assert.equal('[Dygraph graph]', dg.toString());
 256           assert.equal('number', typeof(row));
 257           assert.equal('number', typeof(col));
 258           assert.equal(dg, this);
 259           return 'x' + x;
 260         }
 261       },
 262       y: {
 263         valueFormatter: function(y, opts, series_name, dg, row, col) {
 264           assert.equal('number', typeof(y));
 265           assert.equal('function', typeof(opts));
 266           assert.equal('string', typeof(series_name));
 267           assert.equal('[Dygraph graph]', dg.toString());
 268           assert.equal('number', typeof(row));
 269           assert.equal('number', typeof(col));
 270           assert.equal(dg, this);
 271           return 'y' + y;
 272         }
 273       }
 274     },
 275     labels: ['x', 'y']
 276   };
 277   var data = [];
 278   for (var i = 0; i < 10; i++) {
 279     data.push([i, 2 * i]);
 280   }
 281   var graph = document.getElementById("graph");
 282   var g = new Dygraph(graph, data, opts);
 283
 284   // the valueFormatter options do not affect the ticks.
 285   assert.deepEqual(['0','2','4','6','8'], Util.getXLabels());
 286   assert.deepEqual(["0","5","10","15"],
 287                Util.getYLabels());
 288
 289   // they do affect the legend, however.
 290   g.setSelection(2);
 291   assert.equal("x2: y: y4", Util.getLegend());
 292 });
 293
 294 it('testDateValueFormatter', function() {
 295   var opts = {
 296     width: 480,
 297     height: 320,
 298     axes : {
 299       x : {
 300         pixelsPerLabel: 60,
 301         valueFormatter: function(x, opts, series_name, dg, row, col) {
 302           assert.equal('number', typeof(x));
 303           assert.equal('function', typeof(opts));
 304           assert.equal('string', typeof(series_name));
 305           assert.equal('[Dygraph graph]', dg.toString());
 306           assert.equal('number', typeof(row));
 307           assert.equal('number', typeof(col));
 308           assert.equal(dg, this);
 309           return 'x' + Util.formatDate(x);
 310         }
 311       },
 312       y : {
 313         valueFormatter: function(y, opts, series_name, dg, row, col) {
 314           assert.equal('number', typeof(y));
 315           assert.equal('function', typeof(opts));
 316           assert.equal('string', typeof(series_name));
 317           assert.equal('[Dygraph graph]', dg.toString());
 318           assert.equal('number', typeof(row));
 319           assert.equal('number', typeof(col));
 320           assert.equal(dg, this);
 321           return 'y' + y;
 322         }
 323       }
 324     },
 325     labels: ['x', 'y']
 326   };
 327
 328   var data = [];
 329   for (var i = 1; i < 10; i++) {
 330     data.push([new Date("2011/01/0" + i), 2 * i]);
 331   }
 332   var graph = document.getElementById("graph");
 333   var g = new Dygraph(graph, data, opts);
 334
 335   // valueFormatters do not affect ticks.
 336   assert.deepEqual(["02 Jan","04 Jan","06 Jan","08 Jan"], Util.getXLabels());
 337   assert.deepEqual(["5","10","15"], Util.getYLabels());
 338
 339   // the valueFormatter options also affect the legend.
 340   g.setSelection(2);
 341   assert.equal('x2011/01/03: y: y6', Util.getLegend());
 342 });
 343
 344 // This test verifies that when both a valueFormatter and an axisLabelFormatter
 345 // are specified, the axisLabelFormatter takes precedence.
 346 it('testAxisLabelFormatterPrecedence', function() {
 347   var opts = {
 348     width: 480,
 349     height: 320,
 350     axes : {
 351       x : {
 352         valueFormatter: function(x) {
 353           assert.equal('[Dygraph graph]', this.toString());
 354           return 'xvf' + x;
 355         },
 356         axisLabelFormatter: function(x, granularity) {
 357           assert.equal('[Dygraph graph]', this.toString());
 358           return 'x' + x;
 359         }
 360       },
 361       y : {
 362         valueFormatter: function(y) {
 363           assert.equal('[Dygraph graph]', this.toString());
 364           return 'yvf' + y;
 365         },
 366         axisLabelFormatter: function(y) {
 367           assert.equal('[Dygraph graph]', this.toString());
 368           return 'y' + y;
 369         }
 370       }
 371     },
 372     labels: ['x', 'y']
 373   };
 374   var data = [];
 375   for (var i = 0; i < 10; i++) {
 376     data.push([i, 2 * i]);
 377   }
 378   var graph = document.getElementById("graph");
 379   var g = new Dygraph(graph, data, opts);
 380
 381   assert.deepEqual(['x0','x2','x4','x6','x8'], Util.getXLabels());
 382   assert.deepEqual(["y0","y5","y10","y15"], Util.getYLabels());
 383
 384   g.setSelection(9);
 385   assert.equal("xvf9: y: yvf18", Util.getLegend());
 386 });
 387
 388 // This is the same as the previous test, except that options are added
 389 // one-by-one.
 390 it('testAxisLabelFormatterIncremental', function() {
 391   var opts = {
 392     width: 480,
 393     height: 320,
 394     labels: ['x', 'y']
 395   };
 396   var data = [];
 397   for (var i = 0; i < 10; i++) {
 398     data.push([i, 2 * i]);
 399   }
 400   var graph = document.getElementById("graph");
 401   var g = new Dygraph(graph, data, opts);
 402   g.updateOptions({
 403     axes : {
 404       x : {
 405         valueFormatter: function(x) {
 406           return 'xvf' + x;
 407         }
 408       }
 409     }
 410   });
 411   g.updateOptions({
 412     axes : {
 413       y : {
 414         valueFormatter: function(y) {
 415           return 'yvf' + y;
 416         }
 417       }
 418     }
 419   });
 420   g.updateOptions({
 421     axes : {
 422       x : {
 423         axisLabelFormatter: function(x, granularity) {
 424           return 'x' + x;
 425         }
 426       }
 427     }
 428   });
 429   g.updateOptions({
 430     axes : {
 431       y : {
 432         axisLabelFormatter: function(y) {
 433           return 'y' + y;
 434         }
 435       }
 436     }
 437   });
 438
 439   assert.deepEqual(["x0","x2","x4","x6","x8"], Util.getXLabels());
 440   assert.deepEqual(["y0","y5","y10","y15"], Util.getYLabels());
 441
 442   g.setSelection(9);
 443   assert.equal("xvf9: y: yvf18", Util.getLegend());
 444 });
 445
 446 it('testGlobalFormatters', function() {
 447   var opts = {
 448     width: 480,
 449     height: 320,
 450     labels: ['x', 'y'],
 451     valueFormatter: function(x) {
 452       assert.equal('[Dygraph graph]', this);
 453       return 'vf' + x;
 454     },
 455     axisLabelFormatter: function(x) {
 456       assert.equal('[Dygraph graph]', this);
 457       return 'alf' + x;
 458     }
 459   };
 460   var data = [];
 461   for (var i = 0; i < 10; i++) {
 462     data.push([i, 2 * i]);
 463   }
 464   var graph = document.getElementById("graph");
 465   var g = new Dygraph(graph, data, opts);
 466
 467   assert.deepEqual(['alf0','alf2','alf4','alf6','alf8'], Util.getXLabels());
 468   assert.deepEqual(["alf0","alf5","alf10","alf15"], Util.getYLabels());
 469
 470   g.setSelection(9);
 471   assert.equal("vf9: y: vf18", Util.getLegend());
 472 });
 473
 474 it('testValueFormatterParameters', function() {
 475   var calls = [];
 476   // change any functions in list to 'fn' -- functions can't be asserted.
 477   var killFunctions = function(list) {
 478     var out = [];
 479     for (var i = 0; i < list.length; i++) {
 480       if (typeof(list[i]) == 'function') {
 481         out[i] = 'fn';
 482       } else {
 483         out[i] = list[i];
 484       }
 485     }
 486     return out;
 487   };
 488   var taggedRecorder = function(tag) {
 489     return function() {
 490       calls.push([tag].concat([this], killFunctions(arguments)));
 491       return '';
 492     }
 493   };
 494   var opts = {
 495     axes: {
 496       x:  { valueFormatter: taggedRecorder('x') },
 497       y:  { valueFormatter: taggedRecorder('y') },
 498       y2: { valueFormatter: taggedRecorder('y2') }
 499     },
 500     series: {
 501       'y1': { axis: 'y1'},
 502       'y2': { axis: 'y2'}
 503     },
 504     labels: ['x', 'y1', 'y2']
 505   };
 506   var data = [
 507     [0, 1, 2],
 508     [1, 3, 4]
 509   ];
 510   var graph = document.getElementById('graph');
 511   var g = new Dygraph(graph, data, opts);
 512
 513   assert.deepEqual([], calls);
 514   g.setSelection(0);
 515   assert.deepEqual([
 516     // num or millis, opts, series, dygraph, row, col
 517     [ 'x', g, 0, 'fn',  'x', g, 0, 0],
 518     [ 'y', g, 1, 'fn', 'y1', g, 0, 1],
 519     ['y2', g, 2, 'fn', 'y2', g, 0, 2]
 520   ], calls);
 521
 522   calls = [];
 523   g.setSelection(1);
 524   assert.deepEqual([
 525     [ 'x', g, 1, 'fn',  'x', g, 1, 0],
 526     [ 'y', g, 3, 'fn', 'y1', g, 1, 1],
 527     ['y2', g, 4, 'fn', 'y2', g, 1, 2]
 528   ], calls);
 529 });
 530
 531 it('testSeriesOrder', function() {
 532   var opts = {
 533     width: 480,
 534     height: 320
 535   };
 536   var data = "x,00,01,10,11\n" +
 537       "0,101,201,301,401\n" +
 538       "1,102,202,302,402\n" +
 539       "2,103,203,303,403\n" +
 540       "3,104,204,304,404\n"
 541   ;
 542
 543   var graph = document.getElementById("graph");
 544   var g = new Dygraph(graph, data, opts);
 545
 546   g.setSelection(2);
 547   assert.equal('2: 00: 103 01: 203 10: 303 11: 403', Util.getLegend());
 548
 549   // Sanity checks for indexFromSetName
 550   assert.equal(0, g.indexFromSetName("x"));
 551   assert.equal(1, g.indexFromSetName("00"));
 552   assert.equal(null, g.indexFromSetName("abcde"));
 553
 554   // Verify that we get the label list back in the right order
 555   assert.deepEqual(["x", "00", "01", "10", "11"], g.getLabels());
 556 });
 557
 558 it('testLabelKMB', function() {
 559   var data = [];
 560   data.push([0,0]);
 561   data.push([1,2000]);
 562   data.push([2,1000]);
 563
 564   var g = new Dygraph(
 565     document.getElementById("graph"),
 566     data,
 567     {
 568       labels: [ 'X', 'bar' ],
 569       axes : {
 570         y: {
 571           labelsKMB: true
 572         }
 573       }
 574     }
 575   );
 576
 577   assert.deepEqual(["0", "500", "1K", "1.5K", "2K"], Util.getYLabels());
 578 });
 579
 580 it('testLabelKMG2', function() {
 581   var data = [];
 582   data.push([0,0]);
 583   data.push([1,2000]);
 584   data.push([2,1000]);
 585
 586   var g = new Dygraph(
 587     document.getElementById("graph"),
 588     data,
 589     {
 590       labels: [ 'X', 'bar' ],
 591       axes : {
 592         y: {
 593           labelsKMG2: true
 594         }
 595       }
 596     }
 597   );
 598
 599   assert.deepEqual(["0","256","512","768","1k","1.25k","1.5k","1.75k","2k"],
 600                    Util.getYLabels());
 601 });
 602
 603 // Same as testLabelKMG2 but specifies the option at the
 604 // top of the option dictionary.
 605 it('testLabelKMG2_top', function() {
 606   var data = [];
 607   data.push([0,0]);
 608   data.push([1,2000]);
 609   data.push([2,1000]);
 610
 611   var g = new Dygraph(
 612     document.getElementById("graph"),
 613     data,
 614     {
 615       labels: [ 'X', 'bar' ],
 616       labelsKMG2: true
 617     }
 618   );
 619
 620   assert.deepEqual(
 621       ["0","256","512","768","1k","1.25k","1.5k","1.75k","2k"],
 622       Util.getYLabels());
 623 });
 624
 625 it('testSmallLabelKMB', function() {
 626   var data = [];
 627   data.push([0, 0]);
 628   data.push([1, 1e-6]);
 629   data.push([2, 2e-6]);
 630
 631   var g = new Dygraph(
 632     document.getElementById("graph"),
 633     data,
 634     {
 635       labels: [ 'X', 'bar' ],
 636       axes : {
 637         y: {
 638           labelsKMB: true
 639         }
 640       }
 641     }
 642   );
 643
 644   // TODO(danvk): use prefixes here (e.g. m, µ, n)
 645   assert.deepEqual(['0', '5.00e-7', '1.00e-6', '1.50e-6', '2.00e-6'],
 646                    Util.getYLabels());
 647 });
 648
 649 it('testSmallLabelKMG2', function() {
 650   var data = [];
 651   data.push([0, 0]);
 652   data.push([1, 1e-6]);
 653   data.push([2, 2e-6]);
 654
 655   var g = new Dygraph(
 656     document.getElementById("graph"),
 657     data,
 658     {
 659       labels: [ 'X', 'bar' ],
 660       axes : {
 661         y: {
 662           labelsKMG2: true
 663         }
 664       }
 665     }
 666   );
 667
 668   // TODO(danvk): this is strange--the values aren't on powers of two, and are
 669   // these units really used for powers of two in <1? See issue #571.
 670   assert.deepEqual(['0', '0.48u', '0.95u', '1.43u', '1.91u'],
 671                    Util.getYLabels());
 672 });
 673
 674 /**
 675  * Verify that log scale axis range is properly specified.
 676  */
 677 it('testLogScale', function() {
 678   var g = new Dygraph("graph",
 679                       [[0, 5], [1, 1000]], {
 680                         logscale: true,
 681                         labels: ['X', 'Y']
 682                       });
 683   var nonEmptyLabels = Util.getYLabels().filter(function(x) { return x.length > 0; });
 684   assert.deepEqual(["5","10","20","50","100","200","500","1000"], nonEmptyLabels);
 685
 686   g.updateOptions({ logscale : false });
 687   assert.deepEqual(['0','200','400','600','800','1000'], Util.getYLabels());
 688 });
 689
 690 /**
 691  * Verify that include zero range is properly specified.
 692  */
 693 it('testIncludeZero', function() {
 694   var g = new Dygraph("graph",
 695                       [[0, 500], [1, 1000]], {
 696                         includeZero: true,
 697                         labels: ['X', 'Y1']
 698                       });
 699   assert.deepEqual(['0','200','400','600','800','1000'], Util.getYLabels());
 700
 701   g.updateOptions({ includeZero : false });
 702   assert.deepEqual(['500','600','700','800','900','1000'], Util.getYLabels());
 703 });
 704
 705 it('testAxisLabelFontSize', function() {
 706   var graph = document.getElementById("graph");
 707   var g = new Dygraph(graph, simpleData, {});
 708
 709   // Be sure we're dealing with a 14-point default.
 710   assert.equal(14, DEFAULT_ATTRS.axisLabelFontSize);
 711
 712   var assertFontSize = function(selector, expected) {
 713     Util.assertStyleOfChildren(selector, "font-size", expected);
 714   }
 715
 716   assertFontSize(document.querySelectorAll(".dygraph-axis-label-x"), "14px");
 717   assertFontSize(document.querySelectorAll(".dygraph-axis-label-y"), "14px");
 718
 719   g.updateOptions({axisLabelFontSize : 8});
 720   assertFontSize(document.querySelectorAll(".dygraph-axis-label-x"), "8px");
 721   assertFontSize(document.querySelectorAll(".dygraph-axis-label-y"), "8px");
 722
 723   g.updateOptions({
 724     axisLabelFontSize : null,
 725     axes: {
 726       x: { axisLabelFontSize : 5 },
 727     }
 728   });
 729
 730   assertFontSize(document.querySelectorAll(".dygraph-axis-label-x"), "5px");
 731   assertFontSize(document.querySelectorAll(".dygraph-axis-label-y"), "14px");
 732
 733   g.updateOptions({
 734     axes: {
 735       y: { axisLabelFontSize : 20 },
 736     }
 737   });
 738
 739   assertFontSize(document.querySelectorAll(".dygraph-axis-label-x"), "5px");
 740   assertFontSize(document.querySelectorAll(".dygraph-axis-label-y"), "20px");
 741
 742   g.updateOptions({
 743     series: {
 744       Y2: { axis : "y2" } // copy y2 series to y2 axis.
 745     },
 746     axes: {
 747       y2: { axisLabelFontSize : 12 },
 748     }
 749   });
 750
 751   assertFontSize(document.querySelectorAll(".dygraph-axis-label-x"), "5px");
 752   assertFontSize(document.querySelectorAll(".dygraph-axis-label-y1"), "20px");
 753   assertFontSize(document.querySelectorAll(".dygraph-axis-label-y2"), "12px");
 754 });
 755
 756 it('testAxisLabelFontSizeNull', function() {
 757   var graph = document.getElementById("graph");
 758   var g = new Dygraph(graph, simpleData,
 759     {
 760       axisLabelFontSize: null
 761     });
 762
 763   var assertFontSize = function(selector, expected) {
 764     Util.assertStyleOfChildren(selector, "font-size", expected);
 765   };
 766
 767   // Be sure we're dealing with a 14-point default.
 768   assert.equal(14, DEFAULT_ATTRS.axisLabelFontSize);
 769
 770   assertFontSize(document.querySelectorAll(".dygraph-axis-label-x"), "14px");
 771   assertFontSize(document.querySelectorAll(".dygraph-axis-label-y"), "14px");
 772 });
 773
 774 it('testAxisLabelColor', function() {
 775   var graph = document.getElementById("graph");
 776   var g = new Dygraph(graph, simpleData, {});
 777
 778   // Be sure we're dealing with a black default.
 779   assert.equal("black", DEFAULT_ATTRS.axisLabelColor);
 780
 781   var assertColor = function(selector, expected) {
 782     Util.assertStyleOfChildren(selector, "color", expected);
 783   }
 784
 785   assertColor(document.querySelectorAll(".dygraph-axis-label-x"), "rgb(0, 0, 0)");
 786   assertColor(document.querySelectorAll(".dygraph-axis-label-y"), "rgb(0, 0, 0)");
 787
 788   g.updateOptions({ axisLabelColor : "red"});
 789   assertColor(document.querySelectorAll(".dygraph-axis-label-x"), "rgb(255, 0, 0)");
 790   assertColor(document.querySelectorAll(".dygraph-axis-label-y"), "rgb(255, 0, 0)");
 791
 792   g.updateOptions({
 793     axisLabelColor : null,
 794     axes : {
 795       x : { axisLabelColor : "blue" },
 796     }
 797   });
 798
 799   assertColor(document.querySelectorAll(".dygraph-axis-label-x"), "rgb(0, 0, 255)");
 800   assertColor(document.querySelectorAll(".dygraph-axis-label-y"), "rgb(0, 0, 0)");
 801
 802   g.updateOptions({
 803     axes : {
 804       y : { axisLabelColor : "green" },
 805     }
 806   });
 807
 808   assertColor(document.querySelectorAll(".dygraph-axis-label-x"), "rgb(0, 0, 255)");
 809   assertColor(document.querySelectorAll(".dygraph-axis-label-y"), "rgb(0, 128, 0)");
 810
 811   g.updateOptions({
 812     series : {
 813       Y2 : { axis : "y2" } // copy y2 series to y2 axis.
 814     },
 815     axes : {
 816       y2 : { axisLabelColor : "yellow" },
 817     }
 818   });
 819
 820   assertColor(document.querySelectorAll(".dygraph-axis-label-x"), "rgb(0, 0, 255)");
 821   assertColor(document.querySelectorAll(".dygraph-axis-label-y1"), "rgb(0, 128, 0)");
 822   assertColor(document.querySelectorAll(".dygraph-axis-label-y2"), "rgb(255, 255, 0)");
 823 });
 824
 825 it('testAxisLabelColorNull', function() {
 826   var graph = document.getElementById("graph");
 827   var g = new Dygraph(graph, simpleData,
 828     {
 829       axisLabelColor: null
 830     });
 831
 832   var assertColor = function(selector, expected) {
 833     Util.assertStyleOfChildren(selector, "color", expected);
 834   }
 835
 836   // Be sure we're dealing with a 14-point default.
 837   assert.equal(14, DEFAULT_ATTRS.axisLabelFontSize);
 838
 839   assertColor(document.querySelectorAll(".dygraph-axis-label-x"), "rgb(0, 0, 0)");
 840   assertColor(document.querySelectorAll(".dygraph-axis-label-y"), "rgb(0, 0, 0)");
 841 });
 842
 843 /*
 844  * This test shows that the label formatter overrides labelsKMB for all values.
 845  */
 846 it('testLabelFormatterOverridesLabelsKMB', function() {
 847   var g = new Dygraph(
 848       document.getElementById("graph"),
 849       "X,a,b\n" +
 850       "1,0,2000\n" +
 851       "2,500,1500\n" +
 852       "3,1000,1000\n" +
 853       "4,2000,0\n", {
 854         labelsKMB: true,
 855         axisLabelFormatter: function (v) {
 856           return v + ":X";
 857         }
 858       });
 859   assert.deepEqual(["0:X","500:X","1000:X","1500:X","2000:X"], Util.getYLabels());
 860   assert.deepEqual(["1:X","2:X","3:X"], Util.getXLabels());
 861 });
 862
 863 /*
 864  * This test shows that you can override labelsKMB on the axis level.
 865  */
 866 it('testLabelsKMBPerAxis', function() {
 867   var g = new Dygraph(
 868       document.getElementById("graph"),
 869       "x,a,b\n" +
 870       "1000,0,2000\n" +
 871       "2000,500,1500\n" +
 872       "3000,1000,1000\n" +
 873       "4000,2000,0\n", {
 874         labelsKMB: false,
 875         axes: {
 876           y2: { labelsKMB: true },
 877           x: { labelsKMB: true }
 878         },
 879         series: {
 880           b: { axis: "y2" }
 881         }
 882       });
 883
 884   // labelsKMB doesn't apply to the x axis. This value should be different.
 885   // BUG : https://code.google.com/p/dygraphs/issues/detail?id=488
 886   assert.deepEqual(["1000","2000","3000"], Util.getXLabels());
 887   assert.deepEqual(["0","500","1000","1500","2000"], Util.getYLabels(1));
 888   assert.deepEqual(["0","500","1K","1.5K","2K"], Util.getYLabels(2));
 889 });
 890
 891 /*
 892  * This test shows that you can override labelsKMG2 on the axis level.
 893  */
 894 it('testLabelsKMBG2IPerAxis', function() {
 895   var g = new Dygraph(
 896       document.getElementById("graph"),
 897       "x,a,b\n" +
 898       "1000,0,2000\n" +
 899       "2000,500,1500\n" +
 900       "3000,1000,1000\n" +
 901       "4000,2000,0\n", {
 902         labelsKMG2: false,
 903         axes: {
 904           y2: { labelsKMG2: true },
 905           x: { labelsKMG2: true, pixelsPerLabel: 60 }
 906         },
 907         series: {
 908           b: { axis: "y2" }
 909         }
 910       });
 911
 912   // It is weird that labelsKMG2 does something on the x axis but KMB does not.
 913   // Plus I can't be sure they're doing the same thing as they're done in different
 914   // bits of code.
 915   // BUG : https://code.google.com/p/dygraphs/issues/detail?id=488
 916   assert.deepEqual(["1024","2048","3072"], Util.getXLabels());
 917   assert.deepEqual(["0","500","1000","1500","2000"], Util.getYLabels(1));
 918   assert.deepEqual(["0","500","1000","1.46k","1.95k"], Util.getYLabels(2));
 919 });
 920
 921 /**
 922  * This test shows you can override sigFigs on the axis level.
 923  */
 924 it('testSigFigsPerAxis', function() {
 925   var g = new Dygraph(
 926       document.getElementById("graph"),
 927       "x,a,b\n" +
 928       "1000,0,2000\n" +
 929       "2000,500,1500\n" +
 930       "3000,1000,1000\n" +
 931       "4000,2000,0\n", {
 932         sigFigs: 2,
 933         axes: {
 934           y2: { sigFigs: 6 },
 935           x: { sigFigs: 8 }
 936         },
 937         series: {
 938           b: { axis: "y2" }
 939         }
 940
 941       });
 942   // sigFigs doesn't apply to the x axis. This value should be different.
 943   // BUG : https://code.google.com/p/dygraphs/issues/detail?id=488
 944   assert.deepEqual(["1000","2000","3000"], Util.getXLabels());
 945   assert.deepEqual(["0.0","5.0e+2","1.0e+3","1.5e+3","2.0e+3"], Util.getYLabels(1));
 946   assert.deepEqual(["0.00000","500.000","1000.00","1500.00","2000.00"], Util.getYLabels(2));
 947 });
 948
 949 /**
 950  * This test shows you can override digitsAfterDecimal on the axis level.
 951  */
 952 it('testDigitsAfterDecimalPerAxis', function() {
 953   var g = new Dygraph(
 954       document.getElementById("graph"),
 955       "x,a,b\n" +
 956       "0.006,0.001,0.008\n" +
 957       "0.007,0.002,0.007\n" +
 958       "0.008,0.003,0.006\n" +
 959       "0.009,0.004,0.005\n", {
 960         digitsAfterDecimal: 1,
 961         series: {
 962           b: { axis: "y2" }
 963         }
 964
 965       });
 966
 967   g.updateOptions({ axes: { y: { digitsAfterDecimal: 3 }}});
 968   assert.deepEqual(["0.001","0.002","0.002","0.003","0.003","0.004","0.004"], Util.getYLabels(1));
 969   g.updateOptions({ axes: { y: { digitsAfterDecimal: 4 }}});
 970   assert.deepEqual(["0.001","0.0015","0.002","0.0025","0.003","0.0035","0.004"], Util.getYLabels(1));
 971   g.updateOptions({ axes: { y: { digitsAfterDecimal: 5 }}});
 972   assert.deepEqual(["0.001","0.0015","0.002","0.0025","0.003","0.0035","0.004"], Util.getYLabels(1));
 973   g.updateOptions({ axes: { y: { digitsAfterDecimal: null }}});
 974   assert.deepEqual(["1e-3","2e-3","2e-3","3e-3","3e-3","4e-3","4e-3"], Util.getYLabels(1));
 975
 976   g.updateOptions({ axes: { y2: { digitsAfterDecimal: 3 }}});
 977   assert.deepEqual(["0.005","0.006","0.006","0.007","0.007","0.008","0.008"], Util.getYLabels(2));
 978   g.updateOptions({ axes: { y2: { digitsAfterDecimal: 4 }}});
 979   assert.deepEqual(["0.005","0.0055","0.006","0.0065","0.007","0.0075","0.008"], Util.getYLabels(2));
 980   g.updateOptions({ axes: { y2: { digitsAfterDecimal: 5 }}});
 981   assert.deepEqual(["0.005","0.0055","0.006","0.0065","0.007","0.0075","0.008"], Util.getYLabels(2));
 982   g.updateOptions({ axes: { y2: { digitsAfterDecimal: null }}});
 983   assert.deepEqual(["5e-3","6e-3","6e-3","7e-3","7e-3","7e-3","8e-3"], Util.getYLabels(2));
 984
 985
 986   // digitsAfterDecimal is ignored for the x-axis.
 987   // BUG : https://code.google.com/p/dygraphs/issues/detail?id=488
 988   g.updateOptions({ axes: { x: { digitsAfterDecimal: 3 }}});
 989   assert.deepEqual(["0.006","0.007","0.008"], Util.getXLabels());
 990   g.updateOptions({ axes: { x: { digitsAfterDecimal: 4 }}});
 991   assert.deepEqual(["0.006","0.007","0.008"], Util.getXLabels());
 992   g.updateOptions({ axes: { x: { digitsAfterDecimal: 5 }}});
 993   assert.deepEqual(["0.006","0.007","0.008"], Util.getXLabels());
 994   g.updateOptions({ axes: { x: { digitsAfterDecimal: null }}});
 995   assert.deepEqual(["0.006","0.007","0.008"], Util.getXLabels());
 996 });
 997
 998 /**
 999  * This test shows you can override digitsAfterDecimal on the axis level.
1000  */
1001 it('testMaxNumberWidthPerAxis', function() {
1002   var g = new Dygraph(
1003       document.getElementById("graph"),
1004       "x,a,b\n" +
1005       "12401,12601,12804\n" +
1006       "12402,12602,12803\n" +
1007       "12403,12603,12802\n" +
1008       "12404,12604,12801\n", {
1009         maxNumberWidth: 1,
1010         series: {
1011           b: { axis: "y2" }
1012         }
1013       });
1014
1015   g.updateOptions({ axes: { y: { maxNumberWidth: 4 }}});
1016   assert.deepEqual(["1.26e+4","1.26e+4","1.26e+4","1.26e+4","1.26e+4","1.26e+4","1.26e+4"] , Util.getYLabels(1));
1017   g.updateOptions({ axes: { y: { maxNumberWidth: 5 }}});
1018   assert.deepEqual(["12601","12601.5","12602","12602.5","12603","12603.5","12604"] , Util.getYLabels(1));
1019   g.updateOptions({ axes: { y: { maxNumberWidth: null }}});
1020   assert.deepEqual(["1.26e+4","1.26e+4","1.26e+4","1.26e+4","1.26e+4","1.26e+4","1.26e+4"] , Util.getYLabels(1));
1021
1022   g.updateOptions({ axes: { y2: { maxNumberWidth: 4 }}});
1023   assert.deepEqual(["1.28e+4","1.28e+4","1.28e+4","1.28e+4","1.28e+4","1.28e+4","1.28e+4"], Util.getYLabels(2));
1024   g.updateOptions({ axes: { y2: { maxNumberWidth: 5 }}});
1025   assert.deepEqual(["12801","12801.5","12802","12802.5","12803","12803.5","12804"], Util.getYLabels(2));
1026   g.updateOptions({ axes: { y2: { maxNumberWidth: null }}});
1027   assert.deepEqual(["1.28e+4","1.28e+4","1.28e+4","1.28e+4","1.28e+4","1.28e+4","1.28e+4"], Util.getYLabels(2));
1028
1029   // maxNumberWidth is ignored for the x-axis.
1030   // BUG : https://code.google.com/p/dygraphs/issues/detail?id=488
1031   g.updateOptions({ axes: { x: { maxNumberWidth: 4 }}});
1032   assert.deepEqual(["12401","12402","12403"], Util.getXLabels());
1033   g.updateOptions({ axes: { x: { maxNumberWidth: 5 }}});
1034   assert.deepEqual(["12401","12402","12403"], Util.getXLabels());
1035   g.updateOptions({ axes: { x: { maxNumberWidth: null }}});
1036   assert.deepEqual(["12401","12402","12403"], Util.getXLabels());
1037 });
1038
1039 /*
1040 // Regression test for http://code.google.com/p/dygraphs/issues/detail?id=147
1041 // Checks that axis labels stay sane across a DST change.
1042 it('testLabelsCrossDstChange', function() {
1043   // (From tests/daylight-savings.html)
1044   var g = new Dygraph(
1045       document.getElementById("graph"),
1046       "Date/Time,Purchases\n" +
1047       "2010-11-05 00:00:00,167082\n" +
1048       "2010-11-06 00:00:00,168571\n" +
1049       "2010-11-07 00:00:00,177796\n" +
1050       "2010-11-08 00:00:00,165587\n" +
1051       "2010-11-09 00:00:00,164380\n",
1052       { width: 1024 }
1053       );
1054
1055   // Dates and "nice" hours: 6AM/PM and noon, not 5AM/11AM/...
1056   var okLabels = {
1057     '05Nov': true,
1058     '06Nov': true,
1059     '07Nov': true,
1060     '08Nov': true,
1061     '09Nov': true,
1062     '06:00': true,
1063     '12:00': true,
1064     '18:00': true
1065   };
1066
1067   var xLabels = Util.getXLabels();
1068   for (var i = 0; i < xLabels.length; i++) {
1069     assert.isTrue(okLabels[xLabels[i]]);
1070   }
1071
1072   // This range had issues of its own on tests/daylight-savings.html.
1073   g.updateOptions({
1074     dateWindow: [1289109997722.8127, 1289261208937.7659]
1075   });
1076   xLabels = Util.getXLabels();
1077   for (var i = 0; i < xLabels.length; i++) {
1078     assert.isTrue(okLabels[xLabels[i]]);
1079   }
1080 });
1081
1082
1083 // Tests data which crosses a "fall back" at a high enough frequency that you
1084 // can see both 1:00 A.M.s.
1085 it('testLabelsCrossDstChangeHighFreq', function() {
1086   // Generate data which crosses the EST/EDT boundary.
1087   var dst_data = [];
1088   var base_ms = 1383454200000;
1089   for (var x = base_ms; x < base_ms + 1000 * 60 * 80; x += 1000) {
1090     dst_data.push([new Date(x), x]);
1091   }
1092
1093   var g = new Dygraph(
1094           document.getElementById("graph"),
1095           dst_data,
1096       { width: 1024, labels: ['Date', 'Value'] }
1097       );
1098
1099   assert.deepEqual([
1100     '00:50', '00:55',
1101     '01:00', '01:05', '01:10', '01:15', '01:20', '01:25',
1102     '01:30', '01:35', '01:40', '01:45', '01:50', '01:55',
1103     '01:00', '01:05'  // 1 AM number two!
1104   ], Util.getXLabels());
1105
1106   // Now zoom past the initial 1 AM. This used to cause trouble.
1107   g.updateOptions({
1108     dateWindow: [1383454200000 + 15*60*1000, g.xAxisExtremes()[1]]}
1109   );
1110   assert.deepEqual([
1111     '01:05', '01:10', '01:15', '01:20', '01:25',
1112     '01:30', '01:35', '01:40', '01:45', '01:50', '01:55',
1113     '01:00', '01:05'  // 1 AM number two!
1114   ], Util.getXLabels());
1115 });
1116
1117
1118 // Tests data which crosses a "spring forward" at a low frequency.
1119 // Regression test for http://code.google.com/p/dygraphs/issues/detail?id=433
1120 it('testLabelsCrossSpringForward', function() {
1121   var g = new Dygraph(
1122       document.getElementById("graph"),
1123       "Date/Time,Purchases\n" +
1124       "2011-03-11 00:00:00,167082\n" +
1125       "2011-03-12 00:00:00,168571\n" +
1126       "2011-03-13 00:00:00,177796\n" +
1127       "2011-03-14 00:00:00,165587\n" +
1128       "2011-03-15 00:00:00,164380\n",
1129       {
1130         width: 1024,
1131         dateWindow: [1299989043119.4365, 1300080693627.4866]
1132       });
1133
1134   var okLabels = {
1135     '13Mar': true,
1136     // '02:00': true,  // not a real time!
1137     '04:00': true,
1138     '06:00': true,
1139     '08:00': true,
1140     '10:00': true,
1141     '12:00': true,
1142     '14:00': true,
1143     '16:00': true,
1144     '18:00': true,
1145     '20:00': true,
1146     '22:00': true,
1147     '14Mar': true
1148   };
1149
1150   var xLabels = Util.getXLabels();
1151   for (var i = 0; i < xLabels.length; i++) {
1152     assert.isTrue(okLabels[xLabels[i]]);
1153   }
1154 });
1155
1156 it('testLabelsCrossSpringForwardHighFreq', function() {
1157   var base_ms_spring = 1299999000000;
1158   var dst_data_spring = [];
1159   for (var x = base_ms_spring; x < base_ms_spring + 1000 * 60 * 80; x += 1000) {
1160     dst_data_spring.push([new Date(x), x]);
1161   }
1162
1163   var g = new Dygraph(
1164       document.getElementById("graph"),
1165       dst_data_spring,
1166       { width: 1024, labels: ['Date', 'Value'] }
1167   );
1168
1169   assert.deepEqual([
1170     '01:50', '01:55',
1171     '03:00', '03:05', '03:10', '03:15', '03:20', '03:25',
1172     '03:30', '03:35', '03:40', '03:45', '03:50', '03:55',
1173     '04:00', '04:05'
1174   ], Util.getXLabels());
1175 });
1176 */
1177
1178 });