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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
"use strict";
/**
* Creates a new Taskbar Tab within the registry, and asserts that it does not
* already exist.
*
* (This function is also in xpcshell/head.js.)
*
* @param {TaskbarTabsRegistry|TaskbarTabs} aRegistry
* The registry to create the taskbar tab in.
* @param {...*} args
* Arguments to findOrCreateTaskbarTab.
* @returns {TaskbarTab}
* The newly-created taskbar tab.
*/
function createTaskbarTab(aRegistry, ...args) {
let result = aRegistry.findOrCreateTaskbarTab(...args);
function check({ taskbarTab, created }) {
Assert.ok(created, "Created taskbar tab did not exist before");
return taskbarTab;
}
if (result.then) {
return result.then(check);
}
return check(result);
}