/**
 * What this is aimed to test:
 *
 * Expiration relies on an interval, that is user-preffable setting
 * "places.history.expiration.interval_seconds".
 * On pref change it will stop current interval timer and fire a new one,
 * that will obey the new value.
 * If the pref is set to a number <= 0 we will use the default value.
 */

// Default timer value for expiration in seconds.  Must have same value as
// PREF_INTERVAL_SECONDS_NOTSET in nsPlacesExpiration.
const DEFAULT_TIMER_DELAY_SECONDS = 3 * 60;

// Sync this with the const value in the component.
const EXPIRE_AGGRESSIVITY_MULTIPLIER = 3;

var tests = [

  // This test should be the first, so the interval won't be influenced by
  // status of history.
  { desc: "Set interval to 1s.",
    interval: 1,
    expectedTimerDelay: 1
  },

  { desc: "Set interval to a negative value.",
    interval: -1,
    expectedTimerDelay: DEFAULT_TIMER_DELAY_SECONDS
  },

  { desc: "Set interval to 0.",
    interval: 0,
    expectedTimerDelay: DEFAULT_TIMER_DELAY_SECONDS
  },

  { desc: "Set interval to a large value.",
    interval: 100,
    expectedTimerDelay: 100
  },

];

add_task(function* test() {
  // The pref should not exist by default.
  Assert.throws(() => getInterval());

  // Force the component, so it will start observing preferences.
  force_expiration_start();

  for (let currentTest of tests) {
    print(currentTest.desc);
    let promise = promiseTopicObserved("test-interval-changed");
    setInterval(currentTest.interval);
    let [, data] = yield promise;
    Assert.equal(data, currentTest.expectedTimerDelay * EXPIRE_AGGRESSIVITY_MULTIPLIER);
  }

  clearInterval();
});