third_party/WebKit/LayoutTests/fast/js/toString-and-valueOf-override.html

   1 <html>
   2 <head>
   3     <script>
   4         function testToStringAndValueOf(title, type, object)
   5         {
   6             var results = [ title ];
   7             try { addResult(type + ' : ' + object); } catch(e) { addResult(e); }
   8             try { addResult('[' + type + '] : ' + [object]); } catch(e) { addResult(e); }
   9             try { addResult('String(' + type + ') : ' + String(object)); } catch(e) { addResult(e); }
  10             try { addResult('String([' + type + ']) : ' + String([object])); } catch(e) { addResult(e); }
  11             try { addResult(type + '.toString : ' + object.toString); } catch(e) { addResult(e); }
  12             try { var toString = object.toString; addResult(type + '.toString() (cached in variable) : ' + toString()); } catch(e) { addResult(e); }
  13             try { addResult(type + '.toString() : ' + object.toString()); } catch(e) { addResult(e); }
  14             try { addResult('[' + type + '].toString() : ' + [object].toString()); } catch(e) { addResult(e); }
  15             try { addResult(type + '.valueOf() : ' + object.valueOf()); } catch(e) { addResult(e); }
  16             try { addResult('[' + type + '].valueOf() : ' + [object].valueOf()); } catch(e) { addResult(e); }
  17             return results.join('<br>') + '<br><br>';
  18
  19             function addResult(result)
  20             {
  21                 results.push(result);
  22             }
  23         }
  24
  25         function test(resultsElement, type, object)
  26         {
  27             var results = '';
  28             results += testToStringAndValueOf('Unmodified ' + type, type, object);
  29
  30             object.toString = function() { return "toString" }
  31             object.valueOf = function() { return "valueOf" }
  32             results += testToStringAndValueOf(type + ' with modified toString and valueOf', type, object);
  33
  34             object.toString = function() { return new Object(); }
  35             results += testToStringAndValueOf(type + ' with modified toString that returns an Object', type, object);
  36
  37             object.toString = function() { return 'toString'; }
  38             object.valueOf = function() { return new Object(); }
  39             results += testToStringAndValueOf(type + ' with modified valueOf that returns an Object', type, object);
  40
  41             object.toString = function() { return new Object(); }
  42             results += testToStringAndValueOf(type + ' with modified toString and valueOf that returns an Object', type, object);
  43
  44             object.toString = function() { throw "Exception"; }
  45             object.valueOf = function() { return "valueOf"; }
  46             results += testToStringAndValueOf(type + ' with modified toString that throws an exception', type, object);
  47
  48             object.toString = function() { return 'toString'; }
  49             object.valueOf = function() { throw "Exception"; }
  50             results += testToStringAndValueOf(type + ' with modified valueOf that throws an exception', type, object);
  51
  52             object.toString = function() { throw "Exception"; }
  53             object.valueOf = function() { throw "Exception"; }
  54             results += testToStringAndValueOf(type + ' with modified toString an valueOf that throw exceptions', type, object);
  55
  56             resultsElement.innerHTML += results + '<br>';
  57         }
  58
  59         function runTests()
  60         {
  61             if (window.testRunner)
  62                 testRunner.dumpAsText();
  63
  64             var resultsElement = document.getElementById('results');
  65             test(resultsElement, 'span', document.createElement('span'));
  66             test(resultsElement, 'window', window);
  67             test(resultsElement, 'Navigator', window.navigator);
  68             test(resultsElement, 'History', window.history);
  69             test(resultsElement, 'Selection', window.getSelection());
  70         }
  71     </script>
  72 </head>
  73 <body onload="runTests();">
  74 <div id="results">
  75 </div>
  76 </body>
  77 </html>