dom/bindings/test/test_dom_xrays.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=787070
   5 -->
   6 <head>
   7   <meta charset="utf-8">
   8   <title>Test for Bug 787070</title>
   9   <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  10   <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
  11 </head>
  12 <body>
  13 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=787070">Mozilla Bug 787070</a>
  14 <p id="display"></p>
  15 <div id="content" style="display: none">
  16 <iframe id="t" src="http://example.org/tests/dom/bindings/test/file_dom_xrays.html"></iframe>
  17 </div>
  18 <pre id="test">
  19 <script type="application/javascript">
  20
  21 /** Test for Bug 1021066 **/
  22
  23 var Cu = Components.utils;
  24
  25 // values should contain the values that the property should have on each of
  26 // the objects on the prototype chain of obj. A value of undefined signals
  27 // that the value should not be present on that prototype.
  28 function checkXrayProperty(obj, name, values)
  29 {
  30   var instance = obj;
  31   do {
  32     var value = values.shift();
  33     if (typeof value == "undefined") {
  34       ok(!obj.hasOwnProperty(name), "hasOwnProperty shouldn't see \"" + name + "\" through Xrays");
  35       ise(Object.getOwnPropertyDescriptor(obj, name), undefined, "getOwnPropertyDescriptor shouldn't see \"" + name + "\" through Xrays");
  36       ok(Object.keys(obj).indexOf(name) == -1, "Enumerating the Xray should not return \"" + name + "\"");
  37     } else {
  38       ok(obj.hasOwnProperty(name), "hasOwnProperty should see \"" + name + "\" through Xrays");
  39       var pd = Object.getOwnPropertyDescriptor(obj, name);
  40       ok(pd, "getOwnPropertyDescriptor should see \"" + name + "\" through Xrays");
  41       if (pd && pd.get) {
  42         is(pd.get.call(instance), value, "Should get the right value for \"" + name + "\" through Xrays");
  43       } else {
  44         is(obj[name], value, "Should get the right value for \"" + name + "\" through Xrays");
  45       }
  46       if (pd && pd.enumerable) {
  47         ok(Object.keys(obj).indexOf("" + name) > -1, "Enumerating the Xray should return \"" + name + "\"");
  48       }
  49     }
  50   } while ((obj = Object.getPrototypeOf(obj)));
  51 }
  52
  53 function checkWindowXrayProperty(obj, name, windowValue, windowPrototypeValue, namedPropertiesValue, eventTargetValue)
  54 {
  55   checkXrayProperty(obj, name, [ windowValue, windowPrototypeValue, namedPropertiesValue, eventTargetValue ]);
  56 }
  57
  58 function test()
  59 {
  60   // Window
  61   var win = document.getElementById("t").contentWindow;
  62   var doc = document.getElementById("t").contentDocument;
  63
  64   var winProto = Object.getPrototypeOf(win);
  65   ise(winProto, win.Window.prototype, "The proto chain of the Xray should mirror the prototype chain of the Xrayed object");
  66
  67   var namedPropertiesObject = Object.getPrototypeOf(winProto);
  68   ise(Cu.getClassName(namedPropertiesObject, /* unwrap = */ true), "WindowProperties", "The proto chain of the Xray should mirror the prototype chain of the Xrayed object");
  69
  70   var eventTargetProto = Object.getPrototypeOf(namedPropertiesObject);
  71   ise(eventTargetProto, win.EventTarget.prototype, "The proto chain of the Xray should mirror the prototype chain of the Xrayed object");
  72
  73   // Xrays need to filter expandos.
  74   checkWindowXrayProperty(win, "expando", undefined);
  75   ok(!("expando" in win), "Xrays should filter expandos");
  76
  77   checkWindowXrayProperty(win, "shadowedIframe", undefined, undefined, doc.getElementById("shadowedIframe").contentWindow);
  78   ok("shadowedIframe" in win, "Named properties should be exposed through Xrays");
  79
  80   // Named properties live on the named properties object for global objects.
  81   checkWindowXrayProperty(win, "iframe", undefined, undefined, doc.getElementById("iframe").contentWindow);
  82   ok("iframe" in win, "Named properties should be exposed through Xrays");
  83
  84   // Window properties live on the instance, shadowing the properties of the named property object.
  85   checkWindowXrayProperty(win, "document", doc, undefined, doc.getElementById("document").contentWindow);
  86   ok("document" in win, "WebIDL properties should be exposed through Xrays");
  87
  88   // Unforgeable properties live on the instance, shadowing the properties of the named property object.
  89   checkWindowXrayProperty(win, "self", win, undefined, doc.getElementById("self").contentWindow);
  90   ok("self" in win, "WebIDL properties should be exposed through Xrays");
  91
  92   // Object.prototype is at the end of the prototype chain.
  93   var obj = win;
  94   while ((proto = Object.getPrototypeOf(obj))) {
  95     obj = proto;
  96   }
  97   ise(obj, win.Object.prototype, "Object.prototype should be at the end of the prototype chain");
  98
  99   // Named properties shouldn't shadow WebIDL- or ECMAScript-defined properties.
 100   checkWindowXrayProperty(win, "addEventListener", undefined, undefined, undefined, eventTargetProto.addEventListener);
 101   ise(win.addEventListener, eventTargetProto.addEventListener, "Named properties shouldn't shadow WebIDL-defined properties");
 102
 103   ise(win.toString, win.Object.prototype.toString, "Named properties shouldn't shadow ECMAScript-defined properties");
 104
 105   // HTMLDocument
 106   // Unforgeable properties live on the instance.
 107   checkXrayProperty(doc, "location", [ document.getElementById("t").src ]);
 108
 109   // HTMLHtmlElement
 110   var elem = doc.documentElement;
 111
 112   var elemProto = Object.getPrototypeOf(elem);
 113   ise(elemProto, win.HTMLHtmlElement.prototype, "The proto chain of the Xray should mirror the prototype chain of the Xrayed object");
 114
 115   elemProto = Object.getPrototypeOf(elemProto);
 116   ise(elemProto, win.HTMLElement.prototype, "The proto chain of the Xray should mirror the prototype chain of the Xrayed object");
 117
 118   elemProto = Object.getPrototypeOf(elemProto);
 119   ise(elemProto, win.Element.prototype, "The proto chain of the Xray should mirror the prototype chain of the Xrayed object");
 120
 121   elemProto = Object.getPrototypeOf(elemProto);
 122   ise(elemProto, win.Node.prototype, "The proto chain of the Xray should mirror the prototype chain of the Xrayed object");
 123
 124   elemProto = Object.getPrototypeOf(elemProto);
 125   ise(elemProto, win.EventTarget.prototype, "The proto chain of the Xray should mirror the prototype chain of the Xrayed object");
 126
 127   // Xrays need to filter expandos.
 128   ok(!("expando" in elem), "Xrays should filter expandos");
 129
 130   // WebIDL-defined properties live on the prototype.
 131   checkXrayProperty(elem, "version", [ undefined, "" ]);
 132   ise(elem.version, "", "WebIDL properties should be exposed through Xrays");
 133
 134   // HTMLCollection
 135   var coll = doc.getElementsByTagName("iframe");
 136
 137   // Named properties live on the instance for non-global objects.
 138   checkXrayProperty(coll, "iframe", [ doc.getElementById("iframe") ]);
 139
 140   // Indexed properties live on the instance.
 141   checkXrayProperty(coll, 0, [ doc.getElementById("shadowedIframe") ]);
 142
 143   // WebIDL-defined properties live on the prototype, overriding any named properties.
 144   checkXrayProperty(coll, "item", [ undefined, win.HTMLCollection.prototype.item ]);
 145
 146   // ECMAScript-defined properties live on the prototype, overriding any named properties.
 147   checkXrayProperty(coll, "toString", [ undefined, undefined, win.Object.prototype.toString ]);
 148
 149   SimpleTest.finish();
 150 }
 151
 152 SimpleTest.waitForExplicitFinish();
 153 addLoadEvent(test);
 154
 155 </script>
 156 </pre>
 157 </body>
 158 </html>