gecko/browser/base/content/test/general/browser_bug427559.js

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Test bug 427559 to make sure focused elements that are no longer on the page
* will have focus transferred to the window when changing tabs back to that
* tab with the now-gone element.
*/
// Default focus on a button and have it kill itself on blur
let testPage = 'data:text/html,<body><button onblur="this.parentNode.removeChild(this);"><script>document.body.firstChild.focus();</script></body>';
function test() {
waitForExplicitFinish();
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gBrowser.selectedTab = gBrowser.addTab();
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gBrowser.selectedBrowser.addEventListener("load", function () {
gBrowser.selectedBrowser.removeEventListener("load", arguments.callee, true);
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setTimeout(function () {
var testPageWin = content;
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// The test page loaded, so open an empty tab, select it, then restore
// the test tab. This causes the test page's focused element to be removed
// from its document.
gBrowser.selectedTab = gBrowser.addTab();
gBrowser.removeCurrentTab();
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// Make sure focus is given to the window because the element is now gone
is(document.commandDispatcher.focusedWindow, testPageWin,
"content window is focused");
gBrowser.removeCurrentTab();
finish();
}, 0);
}, true);
content.location = testPage;
}