| 1 | const expect = require('expect') |
| 2 | const { DynamicClusterPool } = require('../../../lib/index') |
| 3 | const min = 1 |
| 4 | const max = 3 |
| 5 | const pool = new DynamicClusterPool( |
| 6 | min, |
| 7 | max, |
| 8 | './tests/worker/cluster/testWorker.js', |
| 9 | { |
| 10 | errorHandler: e => console.error(e) |
| 11 | } |
| 12 | ) |
| 13 | |
| 14 | describe('Dynamic cluster pool test suite ', () => { |
| 15 | it('Verify that the function is executed in a worker cluster', async () => { |
| 16 | const result = await pool.execute({ test: 'test' }) |
| 17 | expect(result).toBeDefined() |
| 18 | expect(result).toBeFalsy() |
| 19 | }) |
| 20 | |
| 21 | it('Verify that new workers are created when required, max size is not exceeded and that after a while new workers will die', async () => { |
| 22 | const promises = [] |
| 23 | let closedWorkers = 0 |
| 24 | let fullPool = 0 |
| 25 | pool.emitter.on('FullPool', () => fullPool++) |
| 26 | for (let i = 0; i < max * 2; i++) { |
| 27 | promises.push(pool.execute({ test: 'test' })) |
| 28 | } |
| 29 | expect(pool.workers.length).toBeLessThanOrEqual(max) |
| 30 | expect(pool.workers.length).toBeGreaterThan(min) |
| 31 | pool.workers.forEach(w => { |
| 32 | w.on('exit', () => { |
| 33 | closedWorkers++ |
| 34 | }) |
| 35 | }) |
| 36 | expect(fullPool > 1).toBeTruthy() |
| 37 | await new Promise(resolve => setTimeout(resolve, 5000)) |
| 38 | expect(closedWorkers).toBe(max - min) |
| 39 | }) |
| 40 | |
| 41 | it('Verify scale worker up and down is working', async () => { |
| 42 | expect(pool.workers.length).toBe(min) |
| 43 | for (let i = 0; i < max * 10; i++) { |
| 44 | pool.execute({ test: 'test' }) |
| 45 | } |
| 46 | expect(pool.workers.length).toBeGreaterThan(min) |
| 47 | await new Promise(resolve => setTimeout(resolve, 3000)) |
| 48 | expect(pool.workers.length).toBe(min) |
| 49 | for (let i = 0; i < max * 10; i++) { |
| 50 | pool.execute({ test: 'test' }) |
| 51 | } |
| 52 | expect(pool.workers.length).toBeGreaterThan(min) |
| 53 | await new Promise(resolve => setTimeout(resolve, 3000)) |
| 54 | expect(pool.workers.length).toBe(min) |
| 55 | }) |
| 56 | it('Shutdown test', async () => { |
| 57 | let closedWorkers = 0 |
| 58 | pool.workers.forEach(w => { |
| 59 | w.on('exit', () => { |
| 60 | closedWorkers++ |
| 61 | }) |
| 62 | }) |
| 63 | pool.destroy() |
| 64 | await new Promise(resolve => setTimeout(resolve, 2000)) |
| 65 | expect(closedWorkers).toBe(min) |
| 66 | }) |
| 67 | |
| 68 | it('Validations test', () => { |
| 69 | let error |
| 70 | try { |
| 71 | const pool1 = new DynamicClusterPool() |
| 72 | console.log(pool1) |
| 73 | } catch (e) { |
| 74 | error = e |
| 75 | } |
| 76 | expect(error).toBeTruthy() |
| 77 | expect(error.message).toBeTruthy() |
| 78 | }) |
| 79 | |
| 80 | it('Should work even without opts in input', async () => { |
| 81 | const pool1 = new DynamicClusterPool( |
| 82 | 1, |
| 83 | 1, |
| 84 | './tests/worker/cluster/testWorker.js' |
| 85 | ) |
| 86 | const res = await pool1.execute({ test: 'test' }) |
| 87 | expect(res).toBeFalsy() |
| 88 | }) |
| 89 | |
| 90 | it('Verify scale processes up and down is working when long running task is used:hard', async () => { |
| 91 | const longRunningPool = new DynamicClusterPool( |
| 92 | min, |
| 93 | max, |
| 94 | './tests/worker/cluster/longRunningWorkerHardBehavior.js' |
| 95 | ) |
| 96 | expect(longRunningPool.workers.length).toBe(min) |
| 97 | for (let i = 0; i < max * 10; i++) { |
| 98 | longRunningPool.execute({ test: 'test' }) |
| 99 | } |
| 100 | expect(longRunningPool.workers.length).toBe(max) |
| 101 | await new Promise(resolve => setTimeout(resolve, 3000)) |
| 102 | // Here we expect the workers to be at the max size since that the task is still running |
| 103 | expect(longRunningPool.workers.length).toBe(min) |
| 104 | }) |
| 105 | |
| 106 | it('Verify scale processes up and down is working when long running task is used:soft', async () => { |
| 107 | const longRunningPool = new DynamicClusterPool( |
| 108 | min, |
| 109 | max, |
| 110 | './tests/worker/cluster/longRunningWorkerSoftBehavior.js' |
| 111 | ) |
| 112 | expect(longRunningPool.workers.length).toBe(min) |
| 113 | for (let i = 0; i < max * 10; i++) { |
| 114 | longRunningPool.execute({ test: 'test' }) |
| 115 | } |
| 116 | expect(longRunningPool.workers.length).toBe(max) |
| 117 | await new Promise(resolve => setTimeout(resolve, 3000)) |
| 118 | // Here we expect the workers to be at the max size since that the task is still running |
| 119 | expect(longRunningPool.workers.length).toBe(max) |
| 120 | }) |
| 121 | }) |