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/* Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";
const LABELS_STARTUP_CACHE_REQUESTS = {
HitMemory: 0,
HitDisk: 1,
Miss: 2,
};
add_task(async function () {
// Turn off tab preloading to avoid issues with RemoteController.js
await SpecialPowers.pushPrefEnv({
set: [["browser.newtab.preload", false]],
});
Services.obs.notifyObservers(null, "startupcache-invalidate");
Services.telemetry.getSnapshotForHistograms("main", true);
let newWin = await BrowserTestUtils.openNewBrowserWindow();
let snapshot = Services.telemetry.getSnapshotForHistograms("main", true);
function histValue(label) {
return snapshot.parent.STARTUP_CACHE_REQUESTS.values[label] || 0;
}
Assert.equal(histValue(LABELS_STARTUP_CACHE_REQUESTS.HitMemory), 0);
Assert.equal(histValue(LABELS_STARTUP_CACHE_REQUESTS.HitDisk), 0);
Assert.notEqual(histValue(LABELS_STARTUP_CACHE_REQUESTS.Miss), 0);
await BrowserTestUtils.closeWindow(newWin);
newWin = await BrowserTestUtils.openNewBrowserWindow();
snapshot = Services.telemetry.getSnapshotForHistograms("main", true);
Assert.notEqual(histValue(LABELS_STARTUP_CACHE_REQUESTS.HitMemory), 0);
Assert.equal(histValue(LABELS_STARTUP_CACHE_REQUESTS.HitDisk), 0);
// Here and below, 50 is just a nice round number that should be well over
// what we should observe under normal circumstances, and well under what
// we should see if something is seriously wrong. It won't catch everything,
// but it's better than nothing, and better than a test that cries wolf.
Assert.less(histValue(LABELS_STARTUP_CACHE_REQUESTS.Miss), 50);
await BrowserTestUtils.closeWindow(newWin);
Services.obs.notifyObservers(null, "startupcache-invalidate", "memoryOnly");
newWin = await BrowserTestUtils.openNewBrowserWindow();
snapshot = Services.telemetry.getSnapshotForHistograms("main", true);
Assert.less(histValue(LABELS_STARTUP_CACHE_REQUESTS.HitMemory), 50);
Assert.notEqual(histValue(LABELS_STARTUP_CACHE_REQUESTS.HitDisk), 0);
// Some misses can come through - just ensure it's a small number
Assert.less(histValue(LABELS_STARTUP_CACHE_REQUESTS.Miss), 50);
await BrowserTestUtils.closeWindow(newWin);
});
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