auto_tests/tests/simple_drawing.js

   1 // Copyright (c) 2011 Google, Inc.
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   9 //
  10 // The above copyright notice and this permission notice shall be included in
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  14 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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  19 // THE SOFTWARE.
  20
  21 /**
  22  * @fileoverview Test cases for drawing simple lines.
  23  *
  24  * @author konigsberg@google.com (Robert Konigsberg)
  25  */
  26 var ZERO_TO_FIFTY = [[ 10, 0 ] , [ 20, 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.testDrawSimpleRangePlusOne = function() {
  43   var opts = {
  44     drawXGrid: false,
  45     drawYGrid: false,
  46     drawXAxis: false,
  47     drawYAxis: false,
  48     valueRange: [0,51] }
  49
  50   var graph = document.getElementById("graph");
  51   var g = new Dygraph(graph, ZERO_TO_FIFTY, opts);
  52   var htx = g.hidden_ctx_;
  53
  54   CanvasAssertions.assertLineDrawn(htx, [0,320], [475,6.2745], {
  55     strokeStyle: "#008080",
  56     lineWidth: 1
  57   });
  58   CanvasAssertions.assertBalancedSaveRestore(htx);
  59 };
  60
  61 SimpleDrawingTestCase.prototype.testDrawWithAxis = function() {
  62   var graph = document.getElementById("graph");
  63   var g = new Dygraph(graph, ZERO_TO_FIFTY);
  64
  65   var htx = g.hidden_ctx_;
  66   CanvasAssertions.assertBalancedSaveRestore(htx);
  67 };
  68
  69 /**
  70  * Tests that it is drawing dashes, and it remember the dash history between
  71  * points.
  72  */
  73 SimpleDrawingTestCase.prototype.testDrawSimpleDash = function() {
  74   var opts = {
  75       drawXGrid: false,
  76       drawYGrid: false,
  77       drawXAxis: false,
  78       drawYAxis: false,
  79       'Y1': {strokePattern: [25, 7, 7, 7]},
  80       colors: ['#ff0000']
  81   };
  82
  83   var graph = document.getElementById("graph");
  84   // Set the dims so we pass if default changes.
  85   graph.style.width='480px';
  86   graph.style.height='320px';
  87   var g = new Dygraph(graph, [[1, 4], [2, 5], [3, 3], [4, 7], [5, 9]], opts);
  88   htx = g.hidden_ctx_;
  89
  90   assertEquals(29, CanvasAssertions.numLinesDrawn(htx, "#ff0000"));
  91   CanvasAssertions.assertBalancedSaveRestore(htx);
  92 };
  93
  94 SimpleDrawingTestCase.prototype.testSeparatedPointsDontDraw = function() {
  95   var graph = document.getElementById("graph");
  96   var g = new Dygraph(
  97       graph,
  98       [[1, 10, 11],
  99        [2, 11, null],
 100        [3, 12, 13]],
 101       { colors: ['red', 'blue']});
 102   var htx = g.hidden_ctx_;
 103   assertEquals(2, CanvasAssertions.numLinesDrawn(htx, '#ff0000'));
 104   assertEquals(0, CanvasAssertions.numLinesDrawn(htx, '#0000ff'));
 105 }
 106
 107 SimpleDrawingTestCase.prototype.testSeparatedPointsDontDraw_expanded = function() {
 108   var graph = document.getElementById("graph");
 109   var g = new Dygraph(
 110       graph,
 111       [[0, 10],
 112        [1, 11],
 113        [2, null],
 114        [3, 13],
 115        [4, 14]],
 116       { colors: ['blue']});
 117   var htx = g.hidden_ctx_;
 118   /*
 119   var num_lines = 0;
 120   var lines = CanvasAssertions.getLinesDrawn(htx);
 121   for (var idx = 0; idx < lines.length; idx++) {
 122     var line = lines[idx];
 123     var color = line[1].properties.strokeStyle;
 124     if (color === "#ff0000" || color === "#0000ff") {
 125       console.log(line[0].args, line[1].args, color);
 126     }
 127   }
 128   */
 129
 130   assertEquals(2, CanvasAssertions.numLinesDrawn(htx, '#0000ff'));
 131   CanvasAssertions.assertLineDrawn(htx, [56, 275], [161, 212],
 132       { strokeStyle: '#0000ff', });
 133   CanvasAssertions.assertLineDrawn(htx, [370, 87], [475, 25],
 134       { strokeStyle: '#0000ff', });
 135 }
 136
 137 SimpleDrawingTestCase.prototype.testSeparatedPointsDontDraw_expanded_connected = function() {
 138   var graph = document.getElementById("graph");
 139   var g = new Dygraph(
 140       graph,
 141       [[0, 10],
 142        [1, 11],
 143        [2, null],
 144        [3, 13],
 145        [4, 14]],
 146       { colors: ['blue'], connectSeparatedPoints: true});
 147   var htx = g.hidden_ctx_;
 148   var num_lines = 0;
 149   var lines = CanvasAssertions.getLinesDrawn(htx);
 150   for (var idx = 0; idx < lines.length; idx++) {
 151     var line = lines[idx];
 152     var color = line[1].properties.strokeStyle;
 153     if (color === "#ff0000" || color === "#0000ff") {
 154       console.log(line[0].args, line[1].args, color);
 155     }
 156   }
 157
 158   assertEquals(3, CanvasAssertions.numLinesDrawn(htx, '#0000ff'));
 159   CanvasAssertions.assertLineDrawn(htx, [56, 275], [161, 212],
 160       { strokeStyle: '#0000ff', });
 161   CanvasAssertions.assertLineDrawn(htx, [161, 212], [370, 87],
 162       { strokeStyle: '#0000ff', });
 163   CanvasAssertions.assertLineDrawn(htx, [370, 87], [475, 25],
 164       { strokeStyle: '#0000ff', });
 165 }