-const expect = require('expect')
+const { expect } = require('expect')
const { DynamicThreadPool } = require('../../../lib/index')
const TestUtils = require('../../test-utils')
const min = 1
it('Verify that new workers are created when required, max size is not exceeded and that after a while new workers will die', async () => {
const promises = []
- let fullPool = 0
- pool.emitter.on('FullPool', () => fullPool++)
+ let poolBusy = 0
+ pool.emitter.on('busy', () => poolBusy++)
for (let i = 0; i < max * 2; i++) {
promises.push(pool.execute({ test: 'test' }))
}
- expect(pool.workers.length).toBe(max)
- expect(fullPool > 1).toBeTruthy()
- const res = await TestUtils.waitExits(pool, max - min)
- expect(res).toBe(max - min)
+ expect(pool.workers.length).toBeLessThanOrEqual(max)
+ expect(pool.workers.length).toBeGreaterThan(min)
+ // The `busy` event is triggered when the number of submitted tasks at once reach the max number of workers in the dynamic pool.
+ // So in total numberOfWorkers + 1 times for a loop submitting up to numberOfWorkers * 2 tasks to the dynamic pool.
+ expect(poolBusy).toBe(max + 1)
+ const numberOfExitEvents = await TestUtils.waitExits(pool, max - min)
+ expect(numberOfExitEvents).toBe(max - min)
})
it('Verify scale thread up and down is working', async () => {
})
it('Shutdown test', async () => {
- let closedThreads = 0
- pool.workers.forEach(w => {
- w.on('exit', () => {
- closedThreads++
- })
- })
+ const exitPromise = TestUtils.waitExits(pool, min)
await pool.destroy()
- expect(closedThreads).toBe(min)
+ const numberOfExitEvents = await exitPromise
+ expect(numberOfExitEvents).toBe(min)
})
- it('Validations test', () => {
- expect(() => {
- const pool1 = new DynamicThreadPool()
- }).toThrowError(
+ it('Validation of inputs test', () => {
+ expect(() => new DynamicThreadPool(min)).toThrowError(
new Error('Please specify a file with a worker implementation')
)
})
'./tests/worker-files/thread/testWorker.js'
)
const res = await pool1.execute({ test: 'test' })
+ expect(res).toBeDefined()
expect(res).toBeFalsy()
// We need to clean up the resources after our test
await pool1.destroy()
'./tests/worker-files/thread/longRunningWorkerHardBehavior.js',
{
errorHandler: e => console.error(e),
- onlineHandler: () => console.log('worker is online')
+ onlineHandler: () => console.log('long running worker is online'),
+ exitHandler: () => console.log('long running worker exited')
}
)
expect(longRunningPool.workers.length).toBe(min)
'./tests/worker-files/thread/longRunningWorkerSoftBehavior.js',
{
errorHandler: e => console.error(e),
- onlineHandler: () => console.log('worker is online')
+ onlineHandler: () => console.log('long running worker is online'),
+ exitHandler: () => console.log('long running worker exited')
}
)
expect(longRunningPool.workers.length).toBe(min)
// We need to clean up the resources after our test
await longRunningPool.destroy()
})
+
+ it('Verify that a pool with zero worker can be instantiated', async () => {
+ const pool = new DynamicThreadPool(
+ 0,
+ max,
+ './tests/worker-files/thread/testWorker.js'
+ )
+ expect(pool).toBeInstanceOf(DynamicThreadPool)
+ // We need to clean up the resources after our test
+ await pool.destroy()
+ })
})