Bug: RateLimiter properties bounceBack is not work, And test is not run

[lzj960515]

Description

bull/test/test_rate_limiter.js

Lines 204 to 236 in 60fa88f

	it('should not put a job into the delayed queue when discard is true', () => {
	const newQueue = utils.buildQueue('test rate limiter', {
	limiter: {
	max: 1,
	duration: 1000,
	bounceBack: true
	}
	});
	newQueue.on('failed', e => {
	assert.fail(e);
	});
	return Promise.all([
	newQueue.add({}),
	newQueue.add({}),
	newQueue.add({}),
	newQueue.add({})
	]).then(() => {
	Promise.all([
	newQueue.getNextJob({}),
	newQueue.getNextJob({}),
	newQueue.getNextJob({}),
	newQueue.getNextJob({})
	]).then(() => {
	return newQueue.getDelayedCount().then(delayedCount => {
	expect(delayedCount).to.eq(0);
	return newQueue.getActiveCount().then(waitingCount => {
	expect(waitingCount).to.eq(1);
	});
	});
	});
	});
	});

This Promise not return, So it not run. And waitingCount is expect 3, but is 0.

bull/test/test_rate_limiter.js

Lines 222 to 232 in 60fa88f

	Promise.all([
	newQueue.getNextJob({}),
	newQueue.getNextJob({}),
	newQueue.getNextJob({}),
	newQueue.getNextJob({})
	]).then(() => {
	return newQueue.getDelayedCount().then(delayedCount => {
	expect(delayedCount).to.eq(0);
	return newQueue.getActiveCount().then(waitingCount => {
	expect(waitingCount).to.eq(1);
	});

Bull version

4.12.2

Additional information

Please fix the bug.