dom/events/test/test_bug985988.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=985988
   5 -->
   6 <head>
   7   <meta charset="utf-8">
   8   <title>Test for Bug 985988</title>
   9   <script src="/tests/SimpleTest/SimpleTest.js"></script>
  10   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  11   <script type="application/javascript">
  12
  13   /** Test for Bug 985988 **/
  14
  15   function handler() {
  16     return false;
  17   }
  18
  19   function reversedHandler() {
  20     return true;
  21   }
  22
  23   function test() {
  24     var t = document.getElementById("testtarget");
  25
  26     t.onclick = handler;
  27     var e = new MouseEvent("click", {cancelable: true});
  28     t.dispatchEvent(e);
  29     ok(e.defaultPrevented, "Should have prevented default handling.");
  30
  31     t.onclick = reversedHandler;
  32     e = new MouseEvent("click", {cancelable: true});
  33     t.dispatchEvent(e);
  34     ok(!e.defaultPrevented, "Shouldn't have prevented default handling.");
  35
  36     t.onmouseover = handler;
  37     e = new MouseEvent("mouseover", {cancelable: true});
  38     t.dispatchEvent(e);
  39     ok(e.defaultPrevented, "Should have prevented default handling.");
  40
  41     t.onmouseover = reversedHandler;
  42     e = new MouseEvent("mouseover", {cancelable: true});
  43     t.dispatchEvent(e);
  44     ok(!e.defaultPrevented, "Shouldn't have prevented default handling.");
  45
  46     // error does not have reversed meaning for handler return value on
  47     // non-globals.
  48     t.onerror = handler;
  49     e = new ErrorEvent("error", {cancelable: true});
  50     t.dispatchEvent(e);
  51     ok(e.defaultPrevented, "Should have prevented default handling.");
  52
  53     t.onerror = reversedHandler;
  54     e = new ErrorEvent("error", {cancelable: true});
  55     t.dispatchEvent(e);
  56     ok(!e.defaultPrevented, "Shouldn't have prevented default handling.");
  57
  58     // error has reversed meaning for handler return value on globals.
  59     t = document.getElementById("testtarget2").contentWindow;
  60     t.onerror = reversedHandler;
  61     e = new ErrorEvent("error", {cancelable: true});
  62     t.dispatchEvent(e);
  63     ok(e.defaultPrevented, "Should have prevented default handling.");
  64
  65     t.onerror = handler;
  66     e = new ErrorEvent("error", {cancelable: true});
  67     t.dispatchEvent(e);
  68     ok(!e.defaultPrevented, "Shouldn't have prevented default handling.");
  69
  70     SimpleTest.finish();
  71   }
  72
  73   SimpleTest.waitForExplicitFinish();
  74   addLoadEvent(test);
  75
  76   </script>
  77 </head>
  78 <body onload="test()">
  79 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=985988">Mozilla Bug 985988</a>
  80 <p id="display"></p>
  81 <div id="content" style="display: none">
  82
  83 </div>
  84 <a href="#" id="testtarget">test target</a>
  85 <iframe id="testtarget2"></iframe>
  86 <pre id="test">
  87 </pre>
  88 </body>
  89 </html>