auto_tests/tests/sanity.js

   1 // Copyright (c)  2011 Google, Inc.
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  20
  21
  22 /**
  23  * @fileoverview Test cases that ensure Dygraphs works at all.
  24  *
  25  * @author konigsberg@google.com (Robert Konigsberg)
  26  */
  27 var DEAD_SIMPLE_DATA = [[ 10, 2100 ]];
  28 var ZERO_TO_FIFTY = [[ 10, 0 ] , [ 20, 50 ]];
  29
  30 var SanityTestCase = TestCase("dygraphs-sanity");
  31
  32 SanityTestCase.prototype.setUp = function() {
  33   document.body.innerHTML = "<div id='graph'></div>";
  34 };
  35
  36 /**
  37  * The sanity test of sanity tests.
  38  */
  39 SanityTestCase.prototype.testTrue = function() {
  40   assertTrue(true);
  41 };
  42
  43 /**
  44  * Sanity test that ensures the graph element exists.
  45  */
  46 SanityTestCase.prototype.testGraphExists = function() {
  47   var graph = document.getElementById("graph");
  48   assertNotNull(graph);
  49 };
  50
  51 // TODO(konigsberg): Move the following tests to a new package that
  52 // tests all kinds of toDomCoords, toDataCoords, toPercent, et cetera.
  53
  54 /**
  55  * A sanity test of sorts, by ensuring the dygraph is created, and
  56  * isn't just some piece of junk object.
  57  */
  58 SanityTestCase.prototype.testToString = function() {
  59   var graph = document.getElementById("graph");
  60   var g = new Dygraph(graph, DEAD_SIMPLE_DATA, {});
  61   assertNotNull(g);
  62   assertEquals("[Dygraph graph]", g.toString());
  63 };
  64
  65 /**
  66  * Test that when no valueRange is specified, the y axis range is
  67  * adjusted by 10% on top.
  68  */
  69 SanityTestCase.prototype.testYAxisRange_default = function() {
  70   var graph = document.getElementById("graph");
  71   assertEquals(0, graph.style.length);
  72   var g = new Dygraph(graph, ZERO_TO_FIFTY, {});
  73   assertEquals([0, 55], g.yAxisRange(0));
  74 };
  75
  76 /**
  77  * Test that valueRange matches the y-axis range specifically.
  78  */
  79 SanityTestCase.prototype.testYAxisRange_custom = function() {
  80   var graph = document.getElementById("graph");
  81   var g = new Dygraph(graph, ZERO_TO_FIFTY, { valueRange: [0,50] });
  82   assertEquals([0, 50], g.yAxisRange(0));
  83 };
  84
  85 /**
  86  * Test that valueRange matches the y-axis range specifically.
  87  *
  88  * This is based on the assumption that 20 pixels are dedicated to the
  89  * axis label and tick marks.
  90  * TODO(konigsberg): change yAxisLabelWidth to 0 (or 20) and try again.
  91  */
  92 SanityTestCase.prototype.testToDomYCoord = function() {
  93   var graph = document.getElementById("graph");
  94   var g = new Dygraph(graph, ZERO_TO_FIFTY, { height: 70, valueRange: [0,50] });
  95
  96   assertEquals(50, g.toDomYCoord(0));
  97   assertEquals(0, g.toDomYCoord(50));
  98
  99   for (var x = 0; x <= 50; x++) {
 100     assertEqualsDelta(50 - x, g.toDomYCoord(x), 0.00001);
 101   }
 102 };