|  | <!doctype html> | 
|  | <title>Selection Document.open() tests</title> | 
|  | <div id=log></div> | 
|  | <script src=/resources/testharness.js></script> | 
|  | <script src=/resources/testharnessreport.js></script> | 
|  | <script> | 
|  | "use strict"; | 
|  |  | 
|  | // This tests the HTML spec requirement "Replace the Document's singleton | 
|  | // objects with new instances of those objects. (This includes in particular | 
|  | // the Window, Location, History, ApplicationCache, and Navigator, objects, the | 
|  | // various BarProp objects, the two Storage objects, the various HTMLCollection | 
|  | // objects, and objects defined by other specifications, like Selection and the | 
|  | // document's UndoManager. It also includes all the Web IDL prototypes in the | 
|  | // JavaScript binding, including the Document object's prototype.)" in the | 
|  | // document.open() algorithm. | 
|  |  | 
|  | var iframe = document.createElement("iframe"); | 
|  | var t = async_test("Selection must be replaced with a new object after document.open()"); | 
|  | iframe.onload = function() { | 
|  | t.step(function() { | 
|  | var originalSelection = iframe.contentWindow.getSelection(); | 
|  | assert_equals(originalSelection.rangeCount, 0, | 
|  | "Sanity check: rangeCount must be initially 0"); | 
|  | iframe.contentDocument.body.appendChild( | 
|  | iframe.contentDocument.createTextNode("foo")); | 
|  | var range = iframe.contentDocument.createRange(); | 
|  | range.selectNodeContents(iframe.contentDocument.body); | 
|  | iframe.contentWindow.getSelection().addRange(range); | 
|  | assert_equals(originalSelection.rangeCount, 1, | 
|  | "Sanity check: rangeCount must be 1 after adding a range"); | 
|  |  | 
|  | iframe.contentDocument.open(); | 
|  |  | 
|  | assert_not_equals(iframe.contentWindow.getSelection(), originalSelection, | 
|  | "After document.open(), the Selection object must no longer be the same"); | 
|  | assert_equals(iframe.contentWindow.getSelection().rangeCount, 0, | 
|  | "After document.open(), rangeCount must be 0 again"); | 
|  | }); | 
|  | t.done(); | 
|  | document.body.removeChild(iframe); | 
|  | }; | 
|  | document.body.appendChild(iframe); | 
|  | </script> |