const { expect } = require('expect')
-const { FixedClusterPool } = require('../../../lib/index')
+const { FixedClusterPool, PoolEvents } = require('../../../lib')
const { WorkerFunctions } = require('../../test-types')
const TestUtils = require('../../test-utils')
errorHandler: e => console.error(e)
}
)
+ const queuePool = new FixedClusterPool(
+ numberOfWorkers,
+ './tests/worker-files/cluster/testWorker.js',
+ {
+ enableTasksQueue: true,
+ tasksQueueOptions: {
+ concurrency: 2
+ },
+ errorHandler: e => console.error(e)
+ }
+ )
const emptyPool = new FixedClusterPool(
numberOfWorkers,
'./tests/worker-files/cluster/emptyWorker.js',
await errorPool.destroy()
await asyncErrorPool.destroy()
await emptyPool.destroy()
+ await queuePool.destroy()
})
it('Verify that the function is executed in a worker cluster', async () => {
let result = await pool.execute({
function: WorkerFunctions.fibonacci
})
- expect(result).toBe(false)
+ expect(result).toBe(75025)
result = await pool.execute({
function: WorkerFunctions.factorial
})
- expect(result).toBe(false)
+ expect(result).toBe(9.33262154439441e157)
})
- it('Verify that is possible to invoke the execute method without input', async () => {
+ it('Verify that is possible to invoke the execute() method without input', async () => {
const result = await pool.execute()
expect(result).toBe(false)
})
- it('Verify that busy event is emitted', async () => {
+ it("Verify that 'busy' event is emitted", async () => {
let poolBusy = 0
- pool.emitter.on('busy', () => ++poolBusy)
+ pool.emitter.on(PoolEvents.busy, () => ++poolBusy)
for (let i = 0; i < numberOfWorkers * 2; i++) {
pool.execute()
}
expect(poolBusy).toBe(numberOfWorkers + 1)
})
+ it('Verify that tasks queuing is working', async () => {
+ const promises = new Set()
+ const maxMultiplier = 2
+ 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).toBeLessThanOrEqual(
+ queuePool.opts.tasksQueueOptions.concurrency
+ )
+ expect(workerNode.usage.tasks.executed).toBe(0)
+ expect(workerNode.usage.tasks.queued).toBeGreaterThan(0)
+ expect(workerNode.usage.tasks.maxQueued).toBeGreaterThan(0)
+ }
+ expect(queuePool.info.executingTasks).toBe(numberOfWorkers)
+ expect(queuePool.info.queuedTasks).toBe(
+ numberOfWorkers * maxMultiplier - numberOfWorkers
+ )
+ expect(queuePool.info.maxQueuedTasks).toBe(
+ numberOfWorkers * maxMultiplier - numberOfWorkers
+ )
+ await Promise.all(promises)
+ for (const workerNode of queuePool.workerNodes) {
+ expect(workerNode.usage.tasks.executing).toBe(0)
+ expect(workerNode.usage.tasks.executed).toBeGreaterThan(0)
+ expect(workerNode.usage.tasks.executed).toBeLessThanOrEqual(maxMultiplier)
+ expect(workerNode.usage.tasks.queued).toBe(0)
+ expect(workerNode.usage.tasks.maxQueued).toBe(1)
+ }
+ })
+
it('Verify that is possible to have a worker that return undefined', async () => {
const result = await emptyPool.execute()
expect(result).toBeUndefined()
it('Verify that error handling is working properly:sync', async () => {
const data = { f: 10 }
+ let taskError
+ errorPool.emitter.on(PoolEvents.taskError, e => {
+ taskError = e
+ })
let inError
try {
await errorPool.execute(data)
expect(inError).toBeDefined()
expect(typeof inError === 'string').toBe(true)
expect(inError).toBe('Error Message from ClusterWorker')
+ expect(taskError).toStrictEqual({
+ message: 'Error Message from ClusterWorker',
+ data
+ })
+ expect(
+ errorPool.workerNodes.some(
+ workerNode => workerNode.usage.tasks.failed === 1
+ )
+ ).toBe(true)
})
it('Verify that error handling is working properly:async', async () => {
const data = { f: 10 }
+ let taskError
+ asyncErrorPool.emitter.on(PoolEvents.taskError, e => {
+ taskError = e
+ })
let inError
try {
await asyncErrorPool.execute(data)
expect(inError).toBeDefined()
expect(typeof inError === 'string').toBe(true)
expect(inError).toBe('Error Message from ClusterWorker:async')
+ expect(taskError).toStrictEqual({
+ message: 'Error Message from ClusterWorker:async',
+ data
+ })
+ expect(
+ asyncErrorPool.workerNodes.some(
+ workerNode => workerNode.usage.tasks.failed === 1
+ )
+ ).toBe(true)
})
it('Verify that async function is working properly', async () => {
const data = { f: 10 }
- const startTime = Date.now()
+ const startTime = performance.now()
const result = await asyncPool.execute(data)
- const usedTime = Date.now() - startTime
+ const usedTime = performance.now() - startTime
expect(result).toStrictEqual(data)
expect(usedTime).toBeGreaterThanOrEqual(2000)
})
it('Shutdown test', async () => {
- const exitPromise = TestUtils.waitExits(pool, numberOfWorkers)
+ const exitPromise = TestUtils.waitWorkerEvents(
+ pool,
+ 'exit',
+ numberOfWorkers
+ )
await pool.destroy()
const numberOfExitEvents = await exitPromise
expect(numberOfExitEvents).toBe(numberOfWorkers)
expect(
() =>
new FixedClusterPool(0, './tests/worker-files/cluster/testWorker.js')
- ).toThrowError(new Error('Cannot instantiate a fixed pool with no worker'))
+ ).toThrowError('Cannot instantiate a fixed pool with no worker')
})
})