| 1 | /** |
| 2 | * @fileoverview FILL THIS IN |
| 3 | * |
| 4 | * @author danvk@google.com (Dan Vanderkam) |
| 5 | */ |
| 6 | var errorBarsTestCase = TestCase("error-bars"); |
| 7 | |
| 8 | errorBarsTestCase.prototype.setUp = function() { |
| 9 | document.body.innerHTML = "<div id='graph'></div>"; |
| 10 | }; |
| 11 | |
| 12 | var _origFunc = Dygraph.getContext; |
| 13 | errorBarsTestCase.prototype.setUp = function() { |
| 14 | document.body.innerHTML = "<div id='graph'></div>"; |
| 15 | Dygraph.getContext = function(canvas) { |
| 16 | return new Proxy(_origFunc(canvas)); |
| 17 | } |
| 18 | }; |
| 19 | |
| 20 | errorBarsTestCase.prototype.tearDown = function() { |
| 21 | Dygraph.getContext = _origFunc; |
| 22 | }; |
| 23 | |
| 24 | errorBarsTestCase.prototype.testErrorBarsDrawn = function() { |
| 25 | var opts = { |
| 26 | width: 480, |
| 27 | height: 320, |
| 28 | drawXGrid: false, |
| 29 | drawYGrid: false, |
| 30 | drawXAxis: false, |
| 31 | drawYAxis: false, |
| 32 | customBars: true, |
| 33 | errorBars: true |
| 34 | }; |
| 35 | var data = [ |
| 36 | [1, [10, 10, 100]], |
| 37 | [2, [15, 20, 110]], |
| 38 | [3, [10, 30, 100]], |
| 39 | [4, [15, 40, 110]], |
| 40 | [5, [10, 120, 100]], |
| 41 | [6, [15, 50, 110]], |
| 42 | [7, [10, 70, 100]], |
| 43 | [8, [15, 90, 110]], |
| 44 | [9, [10, 50, 100]] |
| 45 | ]; |
| 46 | |
| 47 | var graph = document.getElementById("graph"); |
| 48 | var g = new Dygraph(graph, data, opts); |
| 49 | |
| 50 | htx = g.hidden_ctx_; |
| 51 | |
| 52 | var attrs = {}; // TODO(danvk): fill in |
| 53 | |
| 54 | for (var i = 0; i < data.length - 1; i++) { |
| 55 | // bottom line |
| 56 | var xy1 = g.toDomCoords(data[i][0], data[i][1][0]); |
| 57 | var xy2 = g.toDomCoords(data[i + 1][0], data[i + 1][1][0]); |
| 58 | CanvasAssertions.assertLineDrawn(htx, xy1, xy2, attrs); |
| 59 | |
| 60 | // top line |
| 61 | xy1 = g.toDomCoords(data[i][0], data[i][1][2]); |
| 62 | xy2 = g.toDomCoords(data[i + 1][0], data[i + 1][1][2]); |
| 63 | CanvasAssertions.assertLineDrawn(htx, xy1, xy2, attrs); |
| 64 | |
| 65 | // middle line |
| 66 | xy1 = g.toDomCoords(data[i][0], data[i][1][1]); |
| 67 | xy2 = g.toDomCoords(data[i + 1][0], data[i + 1][1][1]); |
| 68 | CanvasAssertions.assertLineDrawn(htx, xy1, xy2, attrs); |
| 69 | } |
| 70 | |
| 71 | g.updateOptions({logscale: true}); |
| 72 | |
| 73 | for (var i = 0; i < data.length - 1; i++) { |
| 74 | // bottom line |
| 75 | var xy1 = g.toDomCoords(data[i][0], data[i][1][0]); |
| 76 | var xy2 = g.toDomCoords(data[i + 1][0], data[i + 1][1][0]); |
| 77 | CanvasAssertions.assertLineDrawn(htx, xy1, xy2, attrs); |
| 78 | |
| 79 | // top line |
| 80 | xy1 = g.toDomCoords(data[i][0], data[i][1][2]); |
| 81 | xy2 = g.toDomCoords(data[i + 1][0], data[i + 1][1][2]); |
| 82 | CanvasAssertions.assertLineDrawn(htx, xy1, xy2, attrs); |
| 83 | |
| 84 | // middle line |
| 85 | xy1 = g.toDomCoords(data[i][0], data[i][1][1]); |
| 86 | xy2 = g.toDomCoords(data[i + 1][0], data[i + 1][1][1]); |
| 87 | CanvasAssertions.assertLineDrawn(htx, xy1, xy2, attrs); |
| 88 | } |
| 89 | CanvasAssertions.assertBalancedSaveRestore(htx); |
| 90 | }; |
| 91 | |
| 92 | errorBarsTestCase.prototype.testErrorBarsCorrectColors = function() { |
| 93 | // Two constant series with constant error. |
| 94 | var data = [ |
| 95 | [0, [100, 50], [200, 50]], |
| 96 | [1, [100, 50], [200, 50]] |
| 97 | ]; |
| 98 | |
| 99 | var opts = { |
| 100 | errorBars: true, |
| 101 | sigma: 1.0, |
| 102 | fillAlpha: 0.15, |
| 103 | colors: ['#00ff00', '#0000ff'], |
| 104 | drawXGrid: false, |
| 105 | drawYGrid: false, |
| 106 | drawXAxis: false, |
| 107 | drawYAxis: false, |
| 108 | width: 400, |
| 109 | height: 300, |
| 110 | valueRange: [0, 300], |
| 111 | labels: ['X', 'Y1', 'Y2'] |
| 112 | }; |
| 113 | var graph = document.getElementById("graph"); |
| 114 | var g = new Dygraph(graph, data, opts); |
| 115 | |
| 116 | // y-pixels (0=top, 299=bottom) |
| 117 | // 0- 48: empty (white) |
| 118 | // 49- 98: Y2 error bar |
| 119 | // 99: Y2 center line |
| 120 | // 100-148: Y2 error bar |
| 121 | // 149-198: Y1 error bar |
| 122 | // 199: Y1 center line |
| 123 | // 200-248: Y1 error bar |
| 124 | // 249-299: empty (white) |
| 125 | // TODO(danvk): test the edges of these regions. |
| 126 | |
| 127 | var ctx = g.hidden_.getContext("2d"); // bypass Proxy |
| 128 | var imageData = ctx.getImageData(0, 0, 400, 300); |
| 129 | |
| 130 | assertEquals(400, imageData.width); |
| 131 | assertEquals(300, imageData.height); |
| 132 | |
| 133 | // returns an (r, g, b, alpha) tuple for the pixel. |
| 134 | // values are in [0, 255]. |
| 135 | var getPixel = function(imageData, x, y) { |
| 136 | var i = 4 * (x + imageData.width * y); |
| 137 | var d = imageData.data; |
| 138 | return [d[i], d[i+1], d[i+2], d[i+3]]; |
| 139 | }; |
| 140 | |
| 141 | assertEquals([0, 0, 255, 38], getPixel(imageData, 200, 75)); |
| 142 | assertEquals([0, 0, 255, 38], getPixel(imageData, 200, 125)); |
| 143 | assertEquals([0, 255, 0, 38], getPixel(imageData, 200, 175)); |
| 144 | assertEquals([0, 255, 0, 38], getPixel(imageData, 200, 225)); |
| 145 | } |