tests2.js

it('throttles and emits apply force if game ongoing', () => {
  const testScheduler = new TestScheduler((actual, expected) => {
    expect(actual).to.deep.equal(expected);
  });
  const action$ = new ActionsObservable(
    testScheduler.createHotObservable('aaab', {
      a: actions.applyForce.click(2),
      b: actions.applyForce.click(3)
    })
  );

  const throttle$ = testScheduler.createColdObservable('---a', {
    a: actions.applyForce.click(3)
  });
  sinon.stub(Observable.prototype, 'throttleTime').returns(throttle$);

  const store = {
    getState: () => ({ /* some state */})
  };

  const test$ = applyForce(action$, store);
  testScheduler.expectObservable(test$).toBe('', {
    // actions epic emits
  });
  testScheduler.flush();

});