Source code
Revision control
Copy as Markdown
Other Tools
Test Info: Warnings
- This test gets skipped with pattern: os == 'linux' && os_version == '18.04' && asan OR os == 'linux' && os_version == '18.04' && tsan OR apple_silicon OR apple_catalina OR os == 'linux' && os_version == '18.04' && debug
- Manifest: browser/components/extensions/test/browser/browser.toml
/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set sts=2 sw=2 et tw=80: */
"use strict";
add_task(async function tabs_discarded_load_and_discard() {
let extension = ExtensionTestUtils.loadExtension({
manifest: {
permissions: ["tabs", "webNavigation"],
},
async background() {
browser.test.sendMessage("ready");
const SHIP = await new Promise(resolve =>
browser.test.onMessage.addListener((msg, data) => {
resolve(data);
})
);
const PAGE_URL =
// Tabs without titles default to URLs without scheme, according to the
// logic of tabbrowser.js's setTabTitle/_setTabLabel.
// of using the unmodified original URL.
const PAGE_TITLE_BEFORE = PAGE_URL_BEFORE;
const PAGE_TITLE_INITIAL = PAGE_URL.replace("http://", "");
const PAGE_TITLE = "Dummy test page";
function assertDeepEqual(expected, actual, message) {
browser.test.assertDeepEq(expected, actual, message);
}
let tab = await browser.tabs.create({
url: PAGE_URL_BEFORE,
discarded: true,
});
const TAB_ID = tab.id;
browser.test.assertTrue(tab.discarded, "Tab initially discarded");
browser.test.assertEq(PAGE_URL_BEFORE, tab.url, "Initial URL");
browser.test.assertEq(PAGE_TITLE_BEFORE, tab.title, "Initial title");
const observedChanges = {
discarded: [],
title: [],
url: [],
};
function tabsOnUpdatedAfterLoad(tabId, changeInfo) {
browser.test.assertEq(TAB_ID, tabId, "tabId for tabs.onUpdated");
for (let [prop, value] of Object.entries(changeInfo)) {
observedChanges[prop].push(value);
}
}
browser.tabs.onUpdated.addListener(tabsOnUpdatedAfterLoad, {
properties: ["discarded", "url", "title"],
});
// Load new URL to transition from discarded:true to discarded:false.
await new Promise(resolve => {
browser.webNavigation.onCompleted.addListener(details => {
browser.test.assertEq(TAB_ID, details.tabId, "onCompleted for tab");
browser.test.assertEq(PAGE_URL, details.url, "URL ater load");
resolve();
});
browser.tabs.update(TAB_ID, { url: PAGE_URL });
});
assertDeepEqual(
[false],
observedChanges.discarded,
"changes to tab.discarded after update"
);
// requested URL and its title. However, the current implementation
// reports several events (including url/title "changes") as part of
// "restoring" the lazy browser prior to loading the requested URL.
let expectedUrlChanges = [PAGE_URL_BEFORE, PAGE_URL];
if (SHIP && observedChanges.url.length === 1) {
// Except when SHIP is enabled, which turns this into a race,
expectedUrlChanges = [PAGE_URL];
}
assertDeepEqual(
expectedUrlChanges,
observedChanges.url,
"changes to tab.url after update"
);
assertDeepEqual(
[PAGE_TITLE_INITIAL, PAGE_TITLE],
observedChanges.title,
"changes to tab.title after update"
);
tab = await browser.tabs.get(TAB_ID);
browser.test.assertFalse(tab.discarded, "tab.discarded after load");
browser.test.assertEq(PAGE_URL, tab.url, "tab.url after load");
browser.test.assertEq(PAGE_TITLE, tab.title, "tab.title after load");
// Reset counters.
observedChanges.discarded.length = 0;
observedChanges.title.length = 0;
observedChanges.url.length = 0;
// Transition from discarded:false to discarded:true
await browser.tabs.discard(TAB_ID);
assertDeepEqual(
[true],
observedChanges.discarded,
"changes to tab.discarded after discard"
);
assertDeepEqual([], observedChanges.url, "tab.url not changed");
assertDeepEqual([], observedChanges.title, "tab.title not changed");
tab = await browser.tabs.get(TAB_ID);
browser.test.assertTrue(tab.discarded, "tab.discarded after discard");
browser.test.assertEq(PAGE_URL, tab.url, "tab.url after discard");
browser.test.assertEq(PAGE_TITLE, tab.title, "tab.title after discard");
await browser.tabs.remove(TAB_ID);
browser.test.sendMessage("done");
},
});
await extension.startup();
await extension.awaitMessage("ready");
extension.sendMessage("SHIP", Services.appinfo.sessionHistoryInParent);
await extension.awaitMessage("done");
await extension.unload();
});