Bug 1714449 - Feature API does not fire update event on startup r=k88hudson

    super(sharedDataKey || DEFAULT_STORE_ID, options);

  }

  async init() {

    await super.init();

    this.getAllActive().forEach(experiment => {

      experiment.featureIds?.forEach(feature =>

        this._emitFeatureUpdate(feature, "feature-experiment-loaded")

      );

    });

  }

  /**

   * Given a feature identifier, find an active experiment that matches that feature identifier.

   * This assumes, for now, that there is only one active experiment per feature per browser.

  );

  Assert.ok(exposureSpy.calledOnce, "Exposure event sent");

});

add_task(async function test_onUpdate_before_store_ready() {

  let sandbox = sinon.createSandbox();

  const feature = new ExperimentFeature("foo", FAKE_FEATURE_MANIFEST);

  const stub = sandbox.stub();

  const manager = ExperimentFakes.manager();

  sandbox.stub(ExperimentAPI, "_store").get(() => manager.store);

  sandbox.stub(manager.store, "getAllActive").returns([

    ExperimentFakes.experiment("foo-experiment", {

      featureIds: ["foo"],

      branch: { slug: "control", feature: { featureId: "foo", value: null } },

    }),

  ]);

  // We register for updates before the store finished loading experiments

  // from disk

  feature.onUpdate(stub);

  await manager.onStartup();

  Assert.ok(

    stub.calledOnce,

    "Called on startup after loading experiments from disk"

  );

  Assert.equal(

    stub.firstCall.args[1],

    "feature-experiment-loaded",

    "Called for the expected reason"

  );

});