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test_frecency_decay.js
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test_frecency_decay.js
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const { PromiseUtils } = ChromeUtils.import(
"resource://gre/modules/PromiseUtils.jsm"
);
const PREF_FREC_DECAY_RATE_DEF = 0.975;
/**
* Promises that the frecency has been changed, and is the new value.
*
* @param {nsIURI} expectedURI The URI to check frecency for.
* @param {Number} expectedFrecency The expected frecency for the URI.
* @returns {Promise} A promise which is resolved when the URI is seen.
*/
function promiseFrecencyChanged(expectedURI, expectedFrecency) {
let deferred = PromiseUtils.defer();
let obs = new NavHistoryObserver();
obs.onFrecencyChanged = (uri, newFrecency, guid, hidden, visitDate) => {
PlacesUtils.history.removeObserver(obs);
Assert.ok(!!uri, "uri should not be null");
Assert.ok(
uri.equals(NetUtil.newURI(expectedURI)),
"uri should be the expected one"
);
Assert.equal(
newFrecency,
expectedFrecency,
"Frecency should be the expected one"
);
deferred.resolve();
};
PlacesUtils.history.addObserver(obs);
return deferred.promise;
}
/**
* Promises that the many frecencies changed notification has been seen.
*
* @returns {Promise} A promise which is resolved when the notification is seen.
*/
function promiseManyFrecenciesChanged() {
let deferred = PromiseUtils.defer();
let obs = new NavHistoryObserver();
obs.onManyFrecenciesChanged = () => {
PlacesUtils.history.removeObserver(obs);
Assert.ok(true);
deferred.resolve();
};
PlacesUtils.history.addObserver(obs);
return deferred.promise;
}
add_task(async function setup() {
Services.prefs.setCharPref(
"places.frecency.decayRate",
PREF_FREC_DECAY_RATE_DEF
);
});
add_task(async function test_frecency_decay() {
let unvisitedBookmarkFrecency = Services.prefs.getIntPref(
"places.frecency.unvisitedBookmarkBonus"
);
// Add a bookmark and check its frecency.
let url = "http://example.com/b";
let promiseOne = promiseFrecencyChanged(url, unvisitedBookmarkFrecency);
await PlacesUtils.bookmarks.insert({
url,
parentGuid: PlacesUtils.bookmarks.unfiledGuid,
});
await promiseOne;
// Trigger DecayFrecency.
let promiseMany = promiseManyFrecenciesChanged();
PlacesUtils.history
.QueryInterface(Ci.nsIObserver)
.observe(null, "idle-daily", "");
await promiseMany;
// Now check the new frecency is correct.
let newFrecency = await PlacesTestUtils.fieldInDB(url, "frecency");
Assert.equal(
newFrecency,
Math.round(unvisitedBookmarkFrecency * PREF_FREC_DECAY_RATE_DEF),
"Frecencies should match"
);
});