auto_tests/tests/range_tests.js

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  20
  21
  22 /**
  23  * @fileoverview Test valueRange and dateWindow changes.
  24  *
  25  * @author konigsberg@google.com (Robert Konigsberg)
  26  */
  27 var ZERO_TO_FIFTY = [[ 10, 0 ] , [ 20, 50 ]];
  28 var ZERO_TO_FIFTY_STEPS = function() {
  29   var a = [];
  30   var x = 10;
  31   var y = 0;
  32   var step = 0;
  33   for (step = 0; step <= 50; step++) {
  34     a.push([x + (step * .2), y + step]);
  35   }
  36   return a;
  37 } ();
  38
  39 var RangeTestCase = TestCase("range-tests");
  40
  41 RangeTestCase.prototype.setUp = function() {
  42   document.body.innerHTML = "<div id='graph'></div>";
  43 };
  44
  45 RangeTestCase.prototype.createGraph = function(opts) {
  46   var graph = document.getElementById("graph");
  47   var g = new Dygraph(graph, ZERO_TO_FIFTY_STEPS, opts);
  48
  49   assertEquals([10, 20], g.xAxisRange());
  50   assertEquals([0, 55], g.yAxisRange(0));
  51
  52   return g;
  53 };
  54
  55 /**
  56  * Test that changes to valueRange and dateWindow are reflected
  57  * appropriately.
  58  */
  59 RangeTestCase.prototype.testRangeSetOperations = function() {
  60   var g = this.createGraph({valueRange : [ 0, 55 ]});
  61
  62   g.updateOptions({ dateWindow : [ 12, 18 ] });
  63   assertEquals([12, 18], g.xAxisRange());
  64   assertEquals([0, 55], g.yAxisRange(0));
  65
  66   g.updateOptions({ valueRange : [ 10, 40 ] });
  67   assertEquals([12, 18], g.xAxisRange());
  68   assertEquals([10, 40], g.yAxisRange(0));
  69
  70   g.updateOptions({  });
  71   assertEquals([12, 18], g.xAxisRange());
  72   assertEquals([10, 40], g.yAxisRange(0));
  73
  74   g.updateOptions({ dateWindow : null, valueRange : null });
  75   assertEquals([10, 20], g.xAxisRange());
  76   assertEquals([0, 55], g.yAxisRange(0));
  77 };
  78
  79 /**
  80  * Verify that when zoomed in by mouse operations, an empty call to
  81  * updateOptions doesn't change the displayed ranges.
  82  */
  83 RangeTestCase.prototype.zoom = function(g, xRange, yRange) {
  84   var originalXRange = g.xAxisRange();
  85   var originalYRange = g.yAxisRange(0);
  86
  87   DygraphOps.dispatchMouseDown(g, xRange[0], yRange[0]);
  88   DygraphOps.dispatchMouseMove(g, xRange[1], yRange[0]); // this is really necessary.
  89   DygraphOps.dispatchMouseUp(g, xRange[1], yRange[0]);
  90
  91   assertEqualsDelta(xRange, g.xAxisRange(), 0.2);
  92   // assertEqualsDelta(originalYRange, g.yAxisRange(0), 0.2); // Not true, it's something in the middle.
  93
  94   var midX = (xRange[1] - xRange[0]) / 2;
  95   DygraphOps.dispatchMouseDown(g, midX, yRange[0]);
  96   DygraphOps.dispatchMouseMove(g, midX, yRange[1]); // this is really necessary.
  97   DygraphOps.dispatchMouseUp(g, midX, yRange[1]);
  98
  99   assertEqualsDelta(xRange, g.xAxisRange(), 0.2);
 100   assertEqualsDelta(yRange, g.yAxisRange(0), 0.2);
 101 }
 102
 103
 104 /**
 105  * Verify that when zoomed in by mouse operations, an empty call to
 106  * updateOptions doesn't change the displayed ranges.
 107  */
 108 RangeTestCase.prototype.testEmptyUpdateOptions_doesntUnzoom = function() {
 109   var g = this.createGraph();
 110   this.zoom(g, [ 11, 18 ], [ 35, 40 ]);
 111
 112   assertEqualsDelta([11, 18], g.xAxisRange(), 0.1);
 113   assertEqualsDelta([35, 40], g.yAxisRange(0), 0.2);
 114
 115   g.updateOptions({});
 116
 117   // This currently fails.
 118   // See http://code.google.com/p/dygraphs/issues/detail?id=192
 119   assertEqualsDelta([11, 18], g.xAxisRange(), 0.1);
 120   // assertEqualsDelta([35, 40], g.yAxisRange(0), 0.2);
 121 }
 122
 123 /**
 124  * Verify that when zoomed in by mouse operations, a call to
 125  * updateOptions({ dateWindow : null, valueRange : null }) fully
 126  * unzooms.
 127  */
 128 RangeTestCase.prototype.testRestoreOriginalRanges_viaUpdateOptions = function() {
 129   var g = this.createGraph();
 130   this.zoom(g, [ 11, 18 ], [ 35, 40 ]);
 131
 132   g.updateOptions({ dateWindow : null, valueRange : null });
 133
 134   assertEquals([0, 55], g.yAxisRange(0));
 135   assertEquals([10, 20], g.xAxisRange());
 136 }