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Test Info: Errors
- This test failed 9 times in the preceding 30 days. quicksearch this test
- Manifest: browser/components/newtab/test/browser/abouthomecache/browser.toml
/* Any copyright is dedicated to the Public Domain.
"use strict";
/**
* Tests that upon initializing Activity Stream, the cached about:home
* document does not process any actions caused by that initialization.
* This is because the restored Redux state from the cache should be enough,
* and processing any of the initialization messages from Activity Stream
* could wipe out that state and cause flicker / unnecessary redraws.
*/
add_task(async function test_no_startup_actions() {
await withFullyLoadedAboutHome(async browser => {
// Make sure we have a cached document. We simulate a restart to ensure
// that we start with a cache... that we can then clear without a problem,
// before writing a new cache. This ensures that no matter what, we're in a
// state where we have a fresh cache, regardless of what's happened in earlier
// tests.
await simulateRestart(browser);
await clearCache();
await simulateRestart(browser);
await ensureCachedAboutHome(browser);
// Set up a listener to monitor for actions that get dispatched in the
// browser when we fire Activity Stream up again.
await SpecialPowers.spawn(browser, [], async () => {
let xrayWindow = ChromeUtils.waiveXrays(content);
xrayWindow.nonStartupActions = [];
xrayWindow.startupActions = [];
xrayWindow.RPMAddMessageListener("ActivityStream:MainToContent", msg => {
if (msg.data.meta.isStartup) {
xrayWindow.startupActions.push(msg.data);
} else {
xrayWindow.nonStartupActions.push(msg.data);
}
});
});
// The following two statements seem to be enough to simulate Activity
// Stream starting up.
AboutNewTab.activityStream.uninit();
AboutNewTab.onBrowserReady();
// Much of Activity Stream initializes asynchronously. This is the easiest way
// I could find to ensure that enough of the feeds had initialized to produce
// a meaningful cached document.
await TestUtils.waitForCondition(() => {
let feed = AboutNewTab.activityStream.store.feeds.get(
"feeds.discoverystreamfeed"
);
return feed?.loaded;
});
// Wait an additional few seconds for any other actions to get displayed.
// eslint-disable-next-line mozilla/no-arbitrary-setTimeout
await new Promise(resolve => setTimeout(resolve, 2000));
let [startupActions, nonStartupActions] = await SpecialPowers.spawn(
browser,
[],
async () => {
let xrayWindow = ChromeUtils.waiveXrays(content);
return [xrayWindow.startupActions, xrayWindow.nonStartupActions];
}
);
Assert.ok(!!startupActions.length, "Should have seen startup actions.");
info(`Saw ${startupActions.length} startup actions.`);
Assert.equal(
nonStartupActions.length,
0,
"Should be no non-startup actions."
);
if (nonStartupActions.length) {
for (let action of nonStartupActions) {
info(`Non-startup action: ${action.type}`);
}
}
});
});