auto_tests/tests/simple_drawing.js

   1 // Copyright (c)  2011 Google, Inc.
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  20
  21 /**
  22  * @fileoverview Test cases for drawing simple lines.
  23  *
  24  * @author konigsberg@google.com (Robert Konigsberg)
  25  */
  26 var ZERO_TO_FIFTY = [[ 20061010, 0 ] , [ 20061011, 50 ]];
  27
  28 var SimpleDrawingTestCase = TestCase("simple-drawing");
  29
  30 var _origFunc = Dygraph.getContext;
  31 SimpleDrawingTestCase.prototype.setUp = function() {
  32   document.body.innerHTML = "<div id='graph'></div>";
  33   Dygraph.getContext = function(canvas) {
  34     return new Proxy(_origFunc(canvas));
  35   }
  36 };
  37
  38 SimpleDrawingTestCase.prototype.tearDown = function() {
  39   Dygraph.getContext = _origFunc;
  40 };
  41
  42 SimpleDrawingTestCase.prototype.testDrawSimple = function() {
  43   var graph = document.getElementById("graph");
  44   var g = new Dygraph(graph, ZERO_TO_FIFTY, {});
  45 }
  46
  47 SimpleDrawingTestCase.prototype.testDrawSimpleRangeEquals = function() {
  48   var graph = document.getElementById("graph");
  49   var g = new Dygraph(graph, ZERO_TO_FIFTY, {valueRange: [0,50]});
  50 }
  51
  52 SimpleDrawingTestCase.prototype.testDrawSimpleRangePlusOne = function() {
  53   var opts = {
  54     drawXGrid: false,
  55     drawYGrid: false,
  56     drawXAxis: false,
  57     drawYAxis: false,
  58     valueRange: [0,51] }
  59
  60   var graph = document.getElementById("graph");
  61   var g = new Dygraph(graph, ZERO_TO_FIFTY, opts);
  62   var htx = g.hidden_ctx_;
  63
  64   CanvasAssertions.assertLineDrawn(htx, [56,300], [475,5.8], {
  65     strokeStyle: "#008080",
  66     lineWidth: 1
  67   });
  68 }