@spotinst/spinnaker-deck/app/scripts/modules/core/src/scheduler/SchedulerFactory.spec.ts

Spinnaker-Deck service, forked with support to Spotinst

import * as angular from 'angular';
import { ITimeoutService, mock } from 'angular';
import { SchedulerFactory } from './SchedulerFactory';

describe('scheduler', function () {
  let $timeout: ITimeoutService;

  beforeEach(function () {
    const pollSchedule = 25;

    this.pollSchedule = pollSchedule;

    mock.inject(function (_$timeout_: ITimeoutService) {
      this.scheduler = SchedulerFactory.createScheduler();
      $timeout = _$timeout_;
    });

    this.test = {
      call: angular.noop,
    };
  });

  describe('#scheduleImmediate', function () {
    it('invokes all subscribed callbacks immediately', function () {
      const numSubscribers = 20;

      spyOn(this.test, 'call');
      for (let i = 0; i < numSubscribers; i++) {
        this.scheduler.subscribe(this.test.call);
      }
      const pre = this.test.call.calls.count();
      this.scheduler.scheduleImmediate();
      expect(this.test.call.calls.count() - pre).toBe(numSubscribers);
    });

    it('does not fire next repeatedly when scheduleImmediate is called within the interval window', function () {
      spyOn(this.test, 'call');
      this.scheduler.subscribe(this.test.call);
      this.scheduler.scheduleImmediate();
      this.scheduler.scheduleImmediate();
      this.scheduler.scheduleImmediate();
      this.scheduler.scheduleImmediate();
      expect(this.test.call.calls.count()).toBe(4);

      $timeout.flush();
      expect(this.test.call.calls.count()).toBe(5);

      // verify no outstanding timeouts
      expect($timeout.flush).toThrow();
    });
  });
});