auto_tests/tests/sanity.js

   1 // Copyright (c)  2011 Google, Inc.
   2 //
   3 // Permission is hereby granted, free of charge, to any person obtaining a copy
   4 // of this software and associated documentation files (the "Software"), to deal
   5 // in the Software without restriction, including without limitation the rights
   6 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   7 // copies of the Software, and to permit persons to whom the Software is
   8 // furnished to do so, subject to the following conditions:
   9 //
  10 // The above copyright notice and this permission notice shall be included in
  11 // all copies or substantial portions of the Software.
  12 //
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  18 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  19 // THE SOFTWARE.
  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 = [[ 20061010, 2100 ]];
  28 var ZERO_TO_FIFTY = [[ 20061010, 0 ] , [ 20061011, 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 /**
  52  * A sanity test of sorts, by ensuring the dygraph is created, and
  53  * isn't just some piece of junk object.
  54  */
  55 SanityTestCase.prototype.testToString = function() {
  56   var graph = document.getElementById("graph");
  57   var g = new Dygraph(graph, DEAD_SIMPLE_DATA, {});
  58   assertNotNull(g);
  59   assertEquals("[Dygraph graph]", g.toString());
  60 };
  61
  62 /**
  63  * Test that when no valueRange is specified, the y axis range is
  64  * adjusted by 10% on top.
  65  */
  66 SanityTestCase.prototype.testYAxisRange_default = function() {
  67   var graph = document.getElementById("graph");
  68   assertEquals(0, graph.style.length);
  69   var g = new Dygraph(graph, ZERO_TO_FIFTY, {});
  70   assertEquals([0, 55], g.yAxisRange(0));
  71 };
  72
  73 /**
  74  * Test that valueRange matches the y-axis range specifically.
  75  */
  76 SanityTestCase.prototype.testYAxisRange_custom = function() {
  77   var graph = document.getElementById("graph");
  78   var g = new Dygraph(graph, ZERO_TO_FIFTY, { valueRange: [0,50] });
  79   assertEquals([0, 50], g.yAxisRange(0));
  80 };
  81
  82 function assertEqualsDelta(msg, expected, actual, delta) {
  83   var args = this.argsWithOptionalMsg_(arguments, 4);
  84
  85   var message = args[0];
  86   var exp = args[1];
  87   var act = args[2];
  88   var d = args[3];
  89   if (Math.abs(exp - act) > d) {
  90     fail(message +
  91         " Expected to be within " + d + " of " + exp + ", got " + act);
  92   }
  93 }
  94
  95 /**
  96  * Test that valueRange matches the y-axis range specifically.
  97  *
  98  * This is based on the assumption that 20 pixels are dedicated to the
  99  * axis label and tick marks.
 100  * TODO(konigsberg): change yAxisLabelWidth to 0 (or 20) and try again.
 101  */
 102 SanityTestCase.prototype.testToDomYCoord = function() {
 103   var graph = document.getElementById("graph");
 104   var g = new Dygraph(graph, ZERO_TO_FIFTY, { height: 70, valueRange: [0,50] });
 105
 106   assertEquals(50, g.toDomYCoord(0));
 107   assertEquals(0, g.toDomYCoord(50));
 108
 109   for (var x = 0; x <= 50; x++) {
 110     assertEqualsDelta(50 - x, g.toDomYCoord(x), 0.00001);
 111   }
 112 };