421715-1.html - mozsearch

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<!DOCTYPE html>

<html>

  <head>

    <script type="text/javascript">

      function stringify(a) {

        if (a)

          return a.toSource();

        return ''+a;

      var args = [undefined, null, [], {}, 0, "0"];

      var stringArgs = args.map(stringify);

      function test_method(context, method, arity) {

        function testParams(existingParams, depth) {

          for (var arg of stringArgs) {

            var code = "context[method](" + existingParams + arg + ")";

            try {

              eval(code);

            } catch (ex) {

              // Exceptions are expected

            if (depth < arity)

              testParams(existingParams + arg + ",", depth + 1);

        testParams("", 1);

      function startTest() {

        var canvas = document.getElementById("img");

        var context = canvas.getContext('2d');;

        test_method(context, "getImageData", 4);

        test_method(context, "putImageData", 3);

    </script>

  </head>

  <body onload="startTest()">

    <canvas id="img">No canvas support.</canvas>

  </body>

</html>