content/canvas/crashtests/421715-1.html

   1 <!DOCTYPE html>
   2 <html>
   3   <head>
   4     <script type="text/javascript">
   5       function stringify(a) {
   6         if (a)
   7           return a.toSource();
   8         return ''+a;
   9       }
  10       var args = [undefined, null, [], {}, 0, "0"];
  11       var stringArgs = args.map(stringify);
  12
  13       function test_method(context, method, arity) {
  14         function testParams(existingParams, depth) {
  15           for each (var arg in stringArgs) {
  16             var code = "context[method](" + existingParams + arg + ")";
  17             try {
  18               eval(code);
  19             } catch (ex) {
  20               // Exceptions are expected
  21             }
  22
  23             if (depth < arity)
  24               testParams(existingParams + arg + ",", depth + 1);
  25           }
  26         }
  27         testParams("", 1);
  28       }
  29
  30       function startTest() {
  31         var canvas = document.getElementById("img");
  32         var context = canvas.getContext('2d');;
  33         test_method(context, "getImageData", 4);
  34         test_method(context, "putImageData", 3);
  35       }
  36     </script>
  37   </head>
  38   <body onload="startTest()">
  39     <canvas id="img">No canvas support.</canvas>
  40   </body>
  41 </html>