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Test Info:
"use strict";
/*
* 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.
const URL =
"data:text/html;charset=utf-8," +
'<body><button onblur="this.remove()">' +
"<script>document.body.firstElementChild.focus()</script></body>";
function getFocusedLocalName(browser) {
return SpecialPowers.spawn(browser, [], async function () {
return content.document.activeElement.localName;
});
}
add_task(async function () {
let testTab = await BrowserTestUtils.openNewForegroundTab(gBrowser, URL);
let browser = testTab.linkedBrowser;
is(await getFocusedLocalName(browser), "button", "button is focused");
let blankTab = await BrowserTestUtils.openNewForegroundTab(
gBrowser,
"about:blank"
);
await BrowserTestUtils.switchTab(gBrowser, testTab);
// Make sure focus is given to the window because the element is now gone.
is(await getFocusedLocalName(browser), "body", "body is focused");
// Cleanup.
gBrowser.removeTab(blankTab);
gBrowser.removeCurrentTab();
});