+ expect(result).toStrictEqual({ ok: 1 })
+ })
+
+ it("Verify that 'ready' event is emitted", async () => {
+ const pool = new FixedClusterPool(
+ numberOfWorkers,
+ './tests/worker-files/cluster/testWorker.js',
+ {
+ errorHandler: e => console.error(e)
+ }
+ )
+ let poolReady = 0
+ pool.emitter.on(PoolEvents.ready, () => ++poolReady)
+ await waitPoolEvents(pool, PoolEvents.ready, 1)
+ expect(poolReady).toBe(1)
+ await pool.destroy()
+ })
+
+ it("Verify that 'busy' event is emitted", async () => {
+ const promises = new Set()
+ let poolBusy = 0
+ pool.emitter.on(PoolEvents.busy, () => ++poolBusy)
+ for (let i = 0; i < numberOfWorkers * 2; i++) {
+ promises.add(pool.execute())
+ }
+ await Promise.all(promises)
+ // The `busy` event is triggered when the number of submitted tasks at once reach the number of fixed pool workers.
+ // So in total numberOfWorkers + 1 times for a loop submitting up to numberOfWorkers * 2 tasks to the fixed pool.
+ expect(poolBusy).toBe(numberOfWorkers + 1)
+ })
+
+ it('Verify that tasks queuing is working', async () => {
+ const promises = new Set()
+ const maxMultiplier = 3 // Must be greater than tasksConcurrency
+ for (let i = 0; i < numberOfWorkers * maxMultiplier; i++) {
+ promises.add(queuePool.execute())
+ }
+ expect(promises.size).toBe(numberOfWorkers * maxMultiplier)
+ for (const workerNode of queuePool.workerNodes) {
+ expect(workerNode.usage.tasks.executing).toBeGreaterThanOrEqual(0)
+ expect(workerNode.usage.tasks.executing).toBeLessThanOrEqual(
+ queuePool.opts.tasksQueueOptions.concurrency
+ )
+ expect(workerNode.usage.tasks.executed).toBe(0)
+ expect(workerNode.usage.tasks.queued).toBe(
+ maxMultiplier - queuePool.opts.tasksQueueOptions.concurrency
+ )
+ expect(workerNode.usage.tasks.maxQueued).toBe(
+ maxMultiplier - queuePool.opts.tasksQueueOptions.concurrency
+ )
+ expect(workerNode.usage.tasks.stolen).toBe(0)
+ }
+ expect(queuePool.info.executedTasks).toBe(0)
+ expect(queuePool.info.executingTasks).toBe(
+ numberOfWorkers * queuePool.opts.tasksQueueOptions.concurrency
+ )
+ expect(queuePool.info.queuedTasks).toBe(
+ numberOfWorkers *
+ (maxMultiplier - queuePool.opts.tasksQueueOptions.concurrency)
+ )
+ expect(queuePool.info.maxQueuedTasks).toBe(
+ numberOfWorkers *
+ (maxMultiplier - queuePool.opts.tasksQueueOptions.concurrency)
+ )
+ expect(queuePool.info.backPressure).toBe(false)
+ expect(queuePool.info.stolenTasks).toBe(0)
+ await Promise.all(promises)
+ for (const workerNode of queuePool.workerNodes) {
+ expect(workerNode.usage.tasks.executing).toBeGreaterThanOrEqual(0)
+ expect(workerNode.usage.tasks.executing).toBeLessThanOrEqual(
+ numberOfWorkers * maxMultiplier
+ )
+ expect(workerNode.usage.tasks.executed).toBe(maxMultiplier)
+ expect(workerNode.usage.tasks.queued).toBe(0)
+ expect(workerNode.usage.tasks.maxQueued).toBe(
+ maxMultiplier - queuePool.opts.tasksQueueOptions.concurrency
+ )
+ expect(workerNode.usage.tasks.stolen).toBeGreaterThanOrEqual(0)
+ expect(workerNode.usage.tasks.stolen).toBeLessThanOrEqual(
+ numberOfWorkers * maxMultiplier
+ )
+ }
+ expect(queuePool.info.executedTasks).toBe(numberOfWorkers * maxMultiplier)
+ expect(queuePool.info.backPressure).toBe(false)
+ expect(queuePool.info.stolenTasks).toBeGreaterThanOrEqual(0)
+ expect(queuePool.info.stolenTasks).toBeLessThanOrEqual(
+ numberOfWorkers * maxMultiplier
+ )