| 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 ROUND_ROBIN strategy can be run in a fixed pool', async () => { |
| 46 | const max = 3 |
| 47 | const pool = new FixedThreadPool( |
| 48 | max, |
| 49 | './tests/worker-files/thread/testWorker.js', |
| 50 | { workerChoiceStrategy: WorkerChoiceStrategies.ROUND_ROBIN } |
| 51 | ) |
| 52 | expect(pool.opts.workerChoiceStrategy).toBe( |
| 53 | WorkerChoiceStrategies.ROUND_ROBIN |
| 54 | ) |
| 55 | // TODO: Create a better test to cover `RoundRobinWorkerChoiceStrategy#choose` |
| 56 | const promises = [] |
| 57 | for (let i = 0; i < max * 2; i++) { |
| 58 | promises.push(pool.execute({ test: 'test' })) |
| 59 | } |
| 60 | await Promise.all(promises) |
| 61 | // We need to clean up the resources after our test |
| 62 | await pool.destroy() |
| 63 | }) |
| 64 | |
| 65 | it('Verify ROUND_ROBIN strategy can be run in a dynamic pool', async () => { |
| 66 | const min = 0 |
| 67 | const max = 3 |
| 68 | const pool = new DynamicThreadPool( |
| 69 | min, |
| 70 | max, |
| 71 | './tests/worker-files/thread/testWorker.js', |
| 72 | { workerChoiceStrategy: WorkerChoiceStrategies.ROUND_ROBIN } |
| 73 | ) |
| 74 | expect(pool.opts.workerChoiceStrategy).toBe( |
| 75 | WorkerChoiceStrategies.ROUND_ROBIN |
| 76 | ) |
| 77 | // TODO: Create a better test to cover `RoundRobinWorkerChoiceStrategy#choose` |
| 78 | const promises = [] |
| 79 | for (let i = 0; i < max * 2; i++) { |
| 80 | promises.push(pool.execute({ test: 'test' })) |
| 81 | } |
| 82 | await Promise.all(promises) |
| 83 | // We need to clean up the resources after our test |
| 84 | await pool.destroy() |
| 85 | }) |
| 86 | |
| 87 | it('Verify LESS_RECENTLY_USED strategy is taken at pool creation', async () => { |
| 88 | const max = 3 |
| 89 | const pool = new FixedThreadPool( |
| 90 | max, |
| 91 | './tests/worker-files/thread/testWorker.js', |
| 92 | { workerChoiceStrategy: WorkerChoiceStrategies.LESS_RECENTLY_USED } |
| 93 | ) |
| 94 | expect(pool.opts.workerChoiceStrategy).toBe( |
| 95 | WorkerChoiceStrategies.LESS_RECENTLY_USED |
| 96 | ) |
| 97 | // We need to clean up the resources after our test |
| 98 | await pool.destroy() |
| 99 | }) |
| 100 | |
| 101 | it('Verify LESS_RECENTLY_USED strategy can be set after pool creation', async () => { |
| 102 | const max = 3 |
| 103 | const pool = new FixedThreadPool( |
| 104 | max, |
| 105 | './tests/worker-files/thread/testWorker.js' |
| 106 | ) |
| 107 | pool.setWorkerChoiceStrategy(WorkerChoiceStrategies.LESS_RECENTLY_USED) |
| 108 | expect(pool.opts.workerChoiceStrategy).toBe( |
| 109 | WorkerChoiceStrategies.LESS_RECENTLY_USED |
| 110 | ) |
| 111 | // We need to clean up the resources after our test |
| 112 | await pool.destroy() |
| 113 | }) |
| 114 | |
| 115 | it('Verify LESS_RECENTLY_USED strategy can be run in a fixed pool', async () => { |
| 116 | const max = 3 |
| 117 | const pool = new FixedThreadPool( |
| 118 | max, |
| 119 | './tests/worker-files/thread/testWorker.js', |
| 120 | { workerChoiceStrategy: WorkerChoiceStrategies.LESS_RECENTLY_USED } |
| 121 | ) |
| 122 | // TODO: Create a better test to cover `LessRecentlyUsedWorkerChoiceStrategy#choose` |
| 123 | const promises = [] |
| 124 | for (let i = 0; i < max * 2; i++) { |
| 125 | promises.push(pool.execute({ test: 'test' })) |
| 126 | } |
| 127 | await Promise.all(promises) |
| 128 | // We need to clean up the resources after our test |
| 129 | await pool.destroy() |
| 130 | }) |
| 131 | |
| 132 | it('Verify LESS_RECENTLY_USED strategy can be run in a dynamic pool', async () => { |
| 133 | const min = 0 |
| 134 | const max = 3 |
| 135 | const pool = new DynamicThreadPool( |
| 136 | min, |
| 137 | max, |
| 138 | './tests/worker-files/thread/testWorker.js', |
| 139 | { workerChoiceStrategy: WorkerChoiceStrategies.LESS_RECENTLY_USED } |
| 140 | ) |
| 141 | // TODO: Create a better test to cover `LessRecentlyUsedWorkerChoiceStrategy#choose` |
| 142 | const promises = [] |
| 143 | for (let i = 0; i < max * 2; i++) { |
| 144 | promises.push(pool.execute({ test: 'test' })) |
| 145 | } |
| 146 | await Promise.all(promises) |
| 147 | // We need to clean up the resources after our test |
| 148 | await pool.destroy() |
| 149 | }) |
| 150 | |
| 151 | it('Verify unknown strategies throw error', () => { |
| 152 | const min = 1 |
| 153 | const max = 3 |
| 154 | expect( |
| 155 | () => |
| 156 | new DynamicThreadPool( |
| 157 | min, |
| 158 | max, |
| 159 | './tests/worker-files/thread/testWorker.js', |
| 160 | { workerChoiceStrategy: 'UNKNOWN_STRATEGY' } |
| 161 | ) |
| 162 | ).toThrowError( |
| 163 | new Error("Worker choice strategy 'UNKNOWN_STRATEGY' not found") |
| 164 | ) |
| 165 | }) |
| 166 | }) |