add_task(async function () {
info("Starting test");
await SpecialPowers.flushPrefEnv();
await SpecialPowers.pushPrefEnv({
set: [["privacy.trackingprotection.enabled", true]],
});
await UrlClassifierTestUtils.addTestTrackers();
let extension = ExtensionTestUtils.loadExtension({
manifest: { permissions: ["https://tracking.example.com/"] },
files: {
"page.html":
'',
"script.js":
'window.count=0;window.p=new Promise(resolve=>{onmessage=e=>{count=e.data.data;resolve();};});p.then(()=>{document.documentElement.setAttribute("count",count);});',
},
async background() {
browser.test.sendMessage("ready", browser.runtime.getURL("page.html"));
},
});
await extension.startup();
let url = await extension.awaitMessage("ready");
info("Creating a new tab");
let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);
let browser = tab.linkedBrowser;
info("Verify the number of script nodes found");
await ContentTask.spawn(browser, [], async function (obj) {
// Need to wait a bit for cross-process postMessage...
await ContentTaskUtils.waitForCondition(
() => content.document.documentElement.getAttribute("count") !== null,
"waiting for 'count' attribute"
);
let count = content.document.documentElement.getAttribute("count");
is(count, 3, "Expected script nodes found");
});
info("Removing the tab");
BrowserTestUtils.removeTab(tab);
UrlClassifierTestUtils.cleanupTestTrackers();
await extension.unload();
});