| 1 | const expect = require('expect') |
| 2 | const { |
| 3 | WorkerChoiceStrategies, |
| 4 | DynamicThreadPool, |
| 5 | FixedThreadPool |
| 6 | } = require('../../lib/index') |
| 7 | |
| 8 | describe('Selection strategies test suite', () => { |
| 9 | it('Verify that WorkerChoiceStrategies enumeration provides string values', () => { |
| 10 | expect(WorkerChoiceStrategies.ROUND_ROBIN).toBe('ROUND_ROBIN') |
| 11 | expect(WorkerChoiceStrategies.LESS_RECENTLY_USED).toBe('LESS_RECENTLY_USED') |
| 12 | }) |
| 13 | |
| 14 | it('Verify ROUND_ROBIN strategy is the default at pool creation', async () => { |
| 15 | const min = 0 |
| 16 | const max = 3 |
| 17 | const pool = new DynamicThreadPool( |
| 18 | min, |
| 19 | max, |
| 20 | './tests/worker-files/thread/testWorker.js' |
| 21 | ) |
| 22 | expect(pool.opts.workerChoiceStrategy).toBe( |
| 23 | WorkerChoiceStrategies.ROUND_ROBIN |
| 24 | ) |
| 25 | // We need to clean up the resources after our test |
| 26 | await pool.destroy() |
| 27 | }) |
| 28 | |
| 29 | it('Verify ROUND_ROBIN strategy can be set after pool creation', async () => { |
| 30 | const min = 0 |
| 31 | const max = 3 |
| 32 | const pool = new DynamicThreadPool( |
| 33 | min, |
| 34 | max, |
| 35 | './tests/worker-files/thread/testWorker.js' |
| 36 | ) |
| 37 | pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.ROUND_ROBIN) |
| 38 | expect(pool.opts.workerChoiceStrategy).toBe( |
| 39 | WorkerChoiceStrategies.ROUND_ROBIN |
| 40 | ) |
| 41 | // We need to clean up the resources after our test |
| 42 | await pool.destroy() |
| 43 | }) |
| 44 | |
| 45 | it('Verify LESS_RECENTLY_USED strategy is taken at pool creation', async () => { |
| 46 | const max = 3 |
| 47 | const pool = new FixedThreadPool( |
| 48 | max, |
| 49 | './tests/worker-files/thread/testWorker.js', |
| 50 | { workerChoiceStrategy: WorkerChoiceStrategies.LESS_RECENTLY_USED } |
| 51 | ) |
| 52 | expect(pool.opts.workerChoiceStrategy).toBe( |
| 53 | WorkerChoiceStrategies.LESS_RECENTLY_USED |
| 54 | ) |
| 55 | // We need to clean up the resources after our test |
| 56 | await pool.destroy() |
| 57 | }) |
| 58 | |
| 59 | it('Verify LESS_RECENTLY_USED strategy can be set after pool creation', async () => { |
| 60 | const max = 3 |
| 61 | const pool = new FixedThreadPool( |
| 62 | max, |
| 63 | './tests/worker-files/thread/testWorker.js' |
| 64 | ) |
| 65 | pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_RECENTLY_USED) |
| 66 | expect(pool.opts.workerChoiceStrategy).toBe( |
| 67 | WorkerChoiceStrategies.LESS_RECENTLY_USED |
| 68 | ) |
| 69 | // We need to clean up the resources after our test |
| 70 | await pool.destroy() |
| 71 | }) |
| 72 | |
| 73 | it('Verify LESS_RECENTLY_USED strategy can be run in a fixed pool', async () => { |
| 74 | const max = 3 |
| 75 | const pool = new FixedThreadPool( |
| 76 | max, |
| 77 | './tests/worker-files/thread/testWorker.js', |
| 78 | { workerChoiceStrategy: WorkerChoiceStrategies.LESS_RECENTLY_USED } |
| 79 | ) |
| 80 | // TODO: Create a better test to cover `LessRecentlyUsedWorkerChoiceStrategy#choose` |
| 81 | const promises = [] |
| 82 | for (let i = 0; i < max * 2; i++) { |
| 83 | promises.push(pool.execute({ test: 'test' })) |
| 84 | } |
| 85 | await Promise.all(promises) |
| 86 | // We need to clean up the resources after our test |
| 87 | await pool.destroy() |
| 88 | }) |
| 89 | |
| 90 | it('Verify LESS_RECENTLY_USED strategy can be run in a dynamic pool', async () => { |
| 91 | const min = 0 |
| 92 | const max = 3 |
| 93 | const pool = new DynamicThreadPool( |
| 94 | min, |
| 95 | max, |
| 96 | './tests/worker-files/thread/testWorker.js', |
| 97 | { workerChoiceStrategy: WorkerChoiceStrategies.LESS_RECENTLY_USED } |
| 98 | ) |
| 99 | // TODO: Create a better test to cover `LessRecentlyUsedWorkerChoiceStrategy#choose` |
| 100 | const promises = [] |
| 101 | for (let i = 0; i < max * 2; i++) { |
| 102 | promises.push(pool.execute({ test: 'test' })) |
| 103 | } |
| 104 | await Promise.all(promises) |
| 105 | // We need to clean up the resources after our test |
| 106 | await pool.destroy() |
| 107 | }) |
| 108 | |
| 109 | it('Verify unknown strategies throw error', () => { |
| 110 | const min = 1 |
| 111 | const max = 3 |
| 112 | expect( |
| 113 | () => |
| 114 | new DynamicThreadPool( |
| 115 | min, |
| 116 | max, |
| 117 | './tests/worker-files/thread/testWorker.js', |
| 118 | { workerChoiceStrategy: 'UNKNOWN_STRATEGY' } |
| 119 | ) |
| 120 | ).toThrowError( |
| 121 | new Error("Worker choice strategy 'UNKNOWN_STRATEGY' not found") |
| 122 | ) |
| 123 | }) |
| 124 | }) |