third_party/WebKit/LayoutTests/fast/dom/canvasContext2d-element-attribute-js-null.html

   1 <html>
   2 <head>
   3     <style type="text/css">
   4         .pass { color: green; }
   5         .fail { color: red; }
   6     </style>
   7     <script>
   8         function printOut(msg)
   9         {
  10             var console = document.getElementById("console");
  11             var span = document.createElement('span');
  12             span.innerHTML = msg + '<br>';
  13             console.appendChild(span);
  14         }
  15
  16         function resultStringifier(result)
  17         {
  18             if (result === "")
  19                 return "<b>the empty string</b>";
  20             else if (result === undefined)
  21                 return "<b>undefined</b>";
  22             else if (result === null)
  23                 return "<b>null</b>";
  24             return "the string '" + result + "'";
  25         }
  26
  27         function nullTestElementAttribute(elementType, element, attr, expected)
  28         {
  29             element[attr] = null;
  30
  31             var result;
  32             if (element[attr] === expected)
  33                 result = "<span class='pass'>TEST SUCCEEDED:</span> The value was " + resultStringifier(expected) + ".";
  34             else
  35                 result = "<span class='fail'>TEST FAILED:</span> The value should have been " + resultStringifier(expected) + " but was " + resultStringifier(element[attr]) + ".";
  36
  37             result += " [tested " + elementType + "." + attr + "]";
  38             printOut(result);
  39         }
  40
  41         function runTests()
  42         {
  43             if (window.testRunner)
  44                 testRunner.dumpAsText();
  45
  46             var canvas = document.createElement('canvas');
  47             var context = canvas.getContext("2d");
  48
  49             var listing = [
  50                 {
  51                     type: 'CanvasRenderingContext2D',
  52                     elementToUse: context,
  53                     attributes: [
  54                         {name: 'globalCompositeOperation', expectedNull: 'source-over'},
  55                         {name: 'lineCap', expectedNull: 'butt'},
  56                         {name: 'lineJoin', expectedNull: 'miter'},
  57                         {name: 'shadowColor', expectedNull: 'rgba(0, 0, 0, 0)'}
  58                     ]
  59                 }
  60             ];
  61
  62             for (element in listing) {
  63                 var type = listing[element].type;
  64                 var elementToUse = listing[element].elementToUse;
  65                 var attrs = listing[element].attributes;
  66                 for (attr in attrs) {
  67                     nullTestElementAttribute(type, elementToUse, attrs[attr].name, attrs[attr].expectedNull);
  68                 }
  69                 printOut('');
  70             }
  71         }
  72     </script>
  73 </head>
  74 <body onload="runTests()">
  75     <p>This test setting various attributes of a CanvasRenderingContext2D to JavaScript null.</p>
  76     <div id="console"></div>
  77 </body>
  78 </html>