third_party/WebKit/LayoutTests/fast/dom/nodelist-item-parameter.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <link rel="help" href="http://www.w3.org/TR/2012/WD-dom-20121206/#dom-nodelist-item">
   5 <script src="../../resources/js-test.js"></script>
   6 </head>
   7 <body>
   8 <span id="target">
   9     <div id="a"></div>
  10     <div id="b"></div>
  11 </span>
  12 <script>
  13 description("Tests that the NodeList.item() argument is correctly validated.");
  14
  15 var nodeList = document.getElementById("target").querySelectorAll('div');
  16 shouldBe("nodeList.__proto__", "NodeList.prototype");
  17
  18 shouldBeEqualToString("nodeList.item(0).id", "a");
  19 shouldBeEqualToString("nodeList.item(1).id", "b");
  20 shouldBeNull("nodeList.item(2)");
  21 shouldBeNull("nodeList.item(-1)");
  22 shouldBeEqualToString("nodeList.item(-4294967295).id", "b"); // Wraps to 1.
  23 shouldThrow("nodeList.item()", '"TypeError: Failed to execute \'item\' on \'NodeList\': 1 argument required, but only 0 present."');
  24 </script>
  25 </body>
  26 </html>