firefox-main/dom/base/test/browser_bug2034329.js (file symbol)

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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/. */
"use strict";
// Regression test for bug 2034329.
//
// DOMStringList::GetParentObject() used to return nullptr.
// This would cause DOMStringList to be created in the current global's realm,
// which is problematic if this is an extension script's global realm as this will
// cause subsequent accesses by web content to throw security errors.
const TEST_PAGE =
add_task(async function bug2034329_domstringlist_realm() {
let extension = ExtensionTestUtils.loadExtension({
manifest: {
content_scripts: [
{
matches: ["http://mochi.test/*"],
js: ["content.js"],
run_at: "document_start",
},
],
},
files: {
"content.js": function () {
// Read ancestorOrigins from the extension content script first.
// Before fix for bug2034329 DOMStringList would be created in the callers compartment.
// Any subsequent accesses by web content would throw exceptions.
void location.ancestorOrigins; // eslint-disable-line no-unused-expressions
},
},
});
await extension.startup();
await BrowserTestUtils.withNewTab(TEST_PAGE, async function (browser) {
let result = await SpecialPowers.spawn(browser, [], function () {
return content.document.getElementById("result").textContent;
});
ok(
result.startsWith("ok:"),
"location.ancestorOrigins must be readable from the page script after " +
"an extension content script accessed it first (got: " +
result +
")"
);
});
await extension.unload();
});
//