Namespace the canvas proxy in auto tests.

[dygraphs.git] / auto_tests / tests / custom_bars.js

// Copyright 2011 Google Inc. All Rights Reserved.

/**
 * @fileoverview Regression test based on some strange customBars data.
 * @author danvk@google.com (Dan Vanderkam)
 */
var CustomBarsTestCase = TestCase("custom-bars");

CustomBarsTestCase._origFunc = Dygraph.getContext;
CustomBarsTestCase.prototype.setUp = function() {
  document.body.innerHTML = "<div id='graph'></div>";
  Dygraph.getContext = function(canvas) {
    return new Proxy(CustomBarsTestCase._origFunc(canvas));
  }
};

CustomBarsTestCase.prototype.tearDown = function() {
  Dygraph.getContext = CustomBarsTestCase._origFunc;
};

// This test used to reliably produce an infinite loop.
CustomBarsTestCase.prototype.testCustomBarsNoHang = function() {
  var opts = {
    width: 480,
    height: 320,
    customBars: true
  };
  var data = "X,Y1,Y2\n" +
    "1,1178.0;1527.5;1856.6,0;22365658;0\n" +
    "2,1253.0;1303.3;1327.3,0;22368228;0\n" +
    "3,878.0;1267.0;1357.1,0;22368895;0\n" +
    "4,1155.0;1273.1;1303.5,0;22369665;0\n" +
    "5,1089.0;1294.8;1355.3,0;22370160;0\n" +
    "6,1088.0;1268.6;1336.1,0;22372346;0\n" +
    "7,1141.0;1269.1;1301.2,0;22373318;0\n" +
    "8,1072.0;1255.8;1326.2,0;22374310;0\n" +
    "9,1209.0;1309.2;1351.8,0;22374924;0\n" +
    "10,1230.0;1303.9;1332.6,0;22380163;0\n" +
    "11,1014.0;1263.5;1330.8,0;22381117;0\n" +
    "12,853.0;1215.6;1330.6,0;22381556;0\n" +
    "13,1134.0;1581.9;1690.1,0;22384631;0\n" +
    "14,1113.0;1540.1;1676.5,0;22386933;0\n" +
    "15,1130.0;1542.7;1678.3,0;22393459;0\n" +
    "18,1582.0;1644.4;1690.2,0;22395914;0\n" +
    "19,878.0;1558.3;1708.1,0;22397732;0\n" +
    "20,1076.0;1598.4;1723.8,0;22397886;0\n" +
    "21,1077.0;1574.0;1685.3,0;22398659;0\n" +
    "22,1118.0;1590.4;1697.6,0;22399009;0\n" +
    "23,1031.0;1473.1;1644.9,0;22401969;0\n" +
    "24,1090.0;1480.7;1640.0,0;22417989;0\n" +
    "25,1592.0;1681.7;1714.4,0;22422819;0\n" +
    "26,1251.0;1657.8;1750.6,0;22423681;0\n" +
    "27,1144.0;1660.9;1776.2,0;22426947;0\n" +
    "28,1178.0;1642.4;1745.6,0;22428238;0\n" +
    "29,1169.0;1649.1;1757.5,0;22429524;0\n" +
    "30,1150.0;1596.1;1746.7,0;22433472;0\n" +
    "31,1099.0;1586.5;1732.8,0;22434308;0\n" +
    "32,1120.0;1456.0;1620.3,0;22434821;0\n" +
    "33,1640.0;1687.7;1709.0,0;22434882;0\n" +
    "34,1671.0;1712.1;1733.7,0;22435116;0\n" +
    "35,,0;22437620;0\n";
  var graph = document.getElementById("graph");
  var g = new Dygraph(graph, data, opts);
};

// Regression test for http://code.google.com/p/dygraphs/issues/detail?id=201
CustomBarsTestCase.prototype.testCustomBarsZero = function() {
  var opts = {
    customBars: true
  };
  var data = "X,Y1,Y2\n" +
"1,1;2;3,0;0;0\n" +
"2,2;3;4,0;0;0\n" +
"3,1;3;5,0;0;0\n";

  var graph = document.getElementById("graph");
  var g = new Dygraph(graph, data, opts);

  var range = g.yAxisRange();
  assertTrue('y-axis must include 0', range[0] <= 0);
  assertTrue('y-axis must include 5', range[1] >= 5);
};

// Regression test for http://code.google.com/p/dygraphs/issues/detail?id=229
CustomBarsTestCase.prototype.testCustomBarsAtTop = function() {
  var g = new Dygraph(document.getElementById("graph"),
      [
        [1, [10, 10, 100]],
        [1, [10, 10, 100]],
        [2, [15, 20, 110]],
        [3, [10, 30, 100]],
        [4, [15, 40, 110]],
        [5, [10,120, 100]],
        [6, [15, 50, 110]],
        [7, [10, 70, 100]],
        [8, [15, 90, 110]],
        [9, [10, 50, 100]]
      ], {
        width: 500, height: 350,
        customBars: true,
        errorBars: true,
        drawXGrid: false,
        drawYGrid: false,
        drawXAxis: false,
        drawYAxis: false,
        valueRange: [0, 120],
        fillAlpha: 0.15,
        colors: [ '#00FF00' ]
      });

  var sampler = new PixelSampler(g);
  assertEquals([0, 255, 0, 38], sampler.colorAtCoordinate(5, 60));
};

// Tests that custom bars work with log scale.
CustomBarsTestCase.prototype.testCustomBarsLogScale = function() {
  var g = new Dygraph(document.getElementById("graph"),
      [
        [1, [10, 10, 100]],
        [5, [15,120, 80]],
        [9, [10, 50, 100]]
      ], {
        width: 500, height: 350,
        customBars: true,
        errorBars: true,
        valueRange: [1, 120],
        drawXGrid: false,
        drawYGrid: false,
        drawXAxis: false,
        drawYAxis: false,
        fillAlpha: 1.0,
        logscale: true,
        colors: [ '#00FF00' ]
      });

  // The following assertions describe the sides of the custom bars, which are
  // drawn in two halves.
  CanvasAssertions.assertConsecutiveLinesDrawn(
      g.hidden_ctx_,
      [[0, 13.329014086362069],
       [247.5, 29.64240889852502],
       [247.5, 152.02209814465604],
       [0, 181.66450704318103]],
      { fillStyle: "#00ff00" });

  CanvasAssertions.assertConsecutiveLinesDrawn(
      g.hidden_ctx_,
      [[247.5, 29.64240889852502],
       [495, 13.329014086362069],
       [495, 181.66450704318103],
       [247.5, 152.02209814465604]],
      { fillStyle: "#00ff00" });
};