third_party/WebKit/LayoutTests/canvas/philip/tests.js

   1 function _valToString(val)
   2 {
   3     if (val === undefined || val === null)
   4         return '[' + typeof(val) + ']';
   5     return val.toString() + '[' + typeof(val) + ']';
   6 }
   7
   8 var _failed = false;
   9 var _asserted = false;
  10
  11 function _warn(text)
  12 {
  13     document.getElementById('d').appendChild(document.createElement('li')).appendChild(document.createTextNode(text));
  14 }
  15
  16 function _fail(text)
  17 {
  18     _warn(text);
  19     _failed = true;
  20 }
  21
  22 function _assert(cond, text)
  23 {
  24     _asserted = true;
  25     if (! cond)
  26         _fail('Failed assertion: ' + text);
  27 }
  28
  29 function _assertSame(a, b, text_a, text_b)
  30 {
  31     _asserted = true;
  32     if (a !== b)
  33         _fail('Failed assertion ' + text_a + ' === ' + text_b +
  34                 ' (got ' + _valToString(a) + ', expected ' + _valToString(b) + ')');
  35 }
  36
  37 function _assertDifferent(a, b, text_a, text_b)
  38 {
  39     _asserted = true;
  40     if (a === b)
  41         _fail('Failed assertion ' + text_a + ' !== ' + text_b +
  42                 ' (got ' + _valToString(a) + ', expected not ' + _valToString(b) + ')');
  43 }
  44
  45 function _assertEqual(a, b, text_a, text_b)
  46 {
  47     _asserted = true;
  48     if (a != b)
  49         _fail('Failed assertion ' + text_a + ' == ' + text_b +
  50                 ' (got ' + _valToString(a) + ', expected ' + _valToString(b) + ')');
  51 }
  52
  53 function _assertMatch(a, b, text_a, text_b)
  54 {
  55     _asserted = true;
  56     if (! a.match(b))
  57         _fail('Failed assertion ' + text_a + ' matches ' + text_b +
  58                 ' (got ' + _valToString(a) + ')');
  59 }
  60
  61
  62 var _manual_check = false;
  63
  64 function _requireManualCheck()
  65 {
  66     _manual_check = true;
  67 }
  68
  69 function _crash()
  70 {
  71     _fail('Aborted due to predicted crash');
  72 }
  73
  74 function _getPixel(canvas, x,y)
  75 {
  76     try
  77     {
  78         var ctx = canvas.getContext('2d');
  79         var imgdata = ctx.getImageData(x, y, 1, 1);
  80         return [ imgdata.data[0], imgdata.data[1], imgdata.data[2], imgdata.data[3] ];
  81     }
  82     catch (e)
  83     {
  84         // probably a security exception caused by having drawn
  85         // data: URLs onto the canvas
  86         _manual_check = true;
  87         return undefined;
  88     }
  89 }
  90
  91 function _assertPixel(canvas, x,y, r,g,b,a, pos, colour)
  92 {
  93     _asserted = true;
  94     var c = _getPixel(canvas, x,y);
  95     if (c && ! (c[0] == r && c[1] == g && c[2] == b && c[3] == a))
  96         _fail('Failed assertion: got pixel [' + c + '] at ('+x+','+y+'), expected ['+r+','+g+','+b+','+a+']');
  97 }
  98
  99 function _assertPixelApprox(canvas, x,y, r,g,b,a, pos, colour, tolerance)
 100 {
 101     _asserted = true;
 102     var c = _getPixel(canvas, x,y);
 103     if (c)
 104     {
 105         var diff = Math.max(Math.abs(c[0]-r), Math.abs(c[1]-g), Math.abs(c[2]-b), Math.abs(c[3]-a));
 106         if (diff > tolerance)
 107             _fail('Failed assertion: got pixel [' + c + '] at ('+x+','+y+'), expected ['+r+','+g+','+b+','+a+'] +/- '+tolerance);
 108     }
 109 }
 110
 111 function _addTest(test)
 112 {
 113     var deferred = false;
 114     window.deferTest = function () { deferred = true; };
 115     function endTest()
 116     {
 117         if (_failed) // test failed
 118         {
 119             document.documentElement.className += ' fail';
 120             window._testStatus = ['fail', document.getElementById('d').innerHTML];
 121         }
 122         else if (_manual_check || !_asserted)
 123         { // test case explicitly asked for a manual check, or no automatic assertions were performed
 124             document.getElementById('d').innerHTML += '<li>Cannot automatically verify result';
 125             document.documentElement.className += ' needs_check';
 126             window._testStatus = ['check', document.getElementById('d').innerHTML];
 127         }
 128         else // test succeeded
 129         {
 130             document.getElementById('d').innerHTML += '<li>Passed';
 131             document.documentElement.className += ' pass';
 132             window._testStatus = ['pass', document.getElementById('d').innerHTML];
 133         }
 134         if (window.testRunner)
 135             testRunner.notifyDone();
 136     };
 137     window.endTest = endTest;
 138     window.wrapFunction = function (f)
 139     {
 140         return function()
 141         {
 142             try
 143             {
 144                 f.apply(null, arguments);
 145             }
 146             catch (e)
 147             {
 148                 _fail('Aborted with exception: ' + e.message);
 149             }
 150             endTest();
 151         };
 152     };
 153
 154     window.onload = function ()
 155     {
 156         if (window.testRunner) {
 157             testRunner.dumpAsText();
 158             testRunner.waitUntilDone();
 159         }
 160         try
 161         {
 162             var canvas = document.getElementById('c');
 163             var ctx = canvas.getContext('2d');
 164             test(canvas, ctx);
 165         }
 166         catch (e)
 167         {
 168             _fail('Aborted with exception: ' + e.message);
 169             deferred = false; // cancel any deference
 170         }
 171
 172         if (! deferred)
 173             endTest();
 174     };
 175 }
 176