| 1 | const { expect } = require('expect') |
| 2 | const { FixedClusterPool, PoolEvents } = require('../../../lib') |
| 3 | const { TaskFunctions } = require('../../test-types') |
| 4 | const { waitPoolEvents, waitWorkerEvents } = require('../../test-utils') |
| 5 | |
| 6 | describe('Fixed cluster pool test suite', () => { |
| 7 | const numberOfWorkers = 8 |
| 8 | const tasksConcurrency = 2 |
| 9 | const pool = new FixedClusterPool( |
| 10 | numberOfWorkers, |
| 11 | './tests/worker-files/cluster/testWorker.js', |
| 12 | { |
| 13 | errorHandler: (e) => console.error(e) |
| 14 | } |
| 15 | ) |
| 16 | const queuePool = new FixedClusterPool( |
| 17 | numberOfWorkers, |
| 18 | './tests/worker-files/cluster/testWorker.js', |
| 19 | { |
| 20 | enableTasksQueue: true, |
| 21 | tasksQueueOptions: { |
| 22 | concurrency: tasksConcurrency |
| 23 | }, |
| 24 | errorHandler: (e) => console.error(e) |
| 25 | } |
| 26 | ) |
| 27 | const emptyPool = new FixedClusterPool( |
| 28 | numberOfWorkers, |
| 29 | './tests/worker-files/cluster/emptyWorker.js', |
| 30 | { exitHandler: () => console.info('empty pool worker exited') } |
| 31 | ) |
| 32 | const echoPool = new FixedClusterPool( |
| 33 | numberOfWorkers, |
| 34 | './tests/worker-files/cluster/echoWorker.js' |
| 35 | ) |
| 36 | const errorPool = new FixedClusterPool( |
| 37 | numberOfWorkers, |
| 38 | './tests/worker-files/cluster/errorWorker.js', |
| 39 | { |
| 40 | errorHandler: (e) => console.error(e) |
| 41 | } |
| 42 | ) |
| 43 | const asyncErrorPool = new FixedClusterPool( |
| 44 | numberOfWorkers, |
| 45 | './tests/worker-files/cluster/asyncErrorWorker.js', |
| 46 | { |
| 47 | errorHandler: (e) => console.error(e) |
| 48 | } |
| 49 | ) |
| 50 | const asyncPool = new FixedClusterPool( |
| 51 | numberOfWorkers, |
| 52 | './tests/worker-files/cluster/asyncWorker.js' |
| 53 | ) |
| 54 | |
| 55 | after('Destroy all pools', async () => { |
| 56 | // We need to clean up the resources after our test |
| 57 | await echoPool.destroy() |
| 58 | await asyncPool.destroy() |
| 59 | await errorPool.destroy() |
| 60 | await asyncErrorPool.destroy() |
| 61 | await emptyPool.destroy() |
| 62 | await queuePool.destroy() |
| 63 | }) |
| 64 | |
| 65 | it('Verify that the function is executed in a worker cluster', async () => { |
| 66 | let result = await pool.execute({ |
| 67 | function: TaskFunctions.fibonacci |
| 68 | }) |
| 69 | expect(result).toBe(75025) |
| 70 | result = await pool.execute({ |
| 71 | function: TaskFunctions.factorial |
| 72 | }) |
| 73 | expect(result).toBe(9.33262154439441e157) |
| 74 | }) |
| 75 | |
| 76 | it('Verify that is possible to invoke the execute() method without input', async () => { |
| 77 | const result = await pool.execute() |
| 78 | expect(result).toStrictEqual({ ok: 1 }) |
| 79 | }) |
| 80 | |
| 81 | it("Verify that 'ready' event is emitted", async () => { |
| 82 | const pool1 = new FixedClusterPool( |
| 83 | numberOfWorkers, |
| 84 | './tests/worker-files/cluster/testWorker.js', |
| 85 | { |
| 86 | errorHandler: (e) => console.error(e) |
| 87 | } |
| 88 | ) |
| 89 | let poolReady = 0 |
| 90 | pool1.emitter.on(PoolEvents.ready, () => ++poolReady) |
| 91 | await waitPoolEvents(pool1, PoolEvents.ready, 1) |
| 92 | expect(poolReady).toBe(1) |
| 93 | }) |
| 94 | |
| 95 | it("Verify that 'busy' event is emitted", async () => { |
| 96 | const promises = new Set() |
| 97 | let poolBusy = 0 |
| 98 | pool.emitter.on(PoolEvents.busy, () => ++poolBusy) |
| 99 | for (let i = 0; i < numberOfWorkers * 2; i++) { |
| 100 | promises.add(pool.execute()) |
| 101 | } |
| 102 | await Promise.all(promises) |
| 103 | // The `busy` event is triggered when the number of submitted tasks at once reach the number of fixed pool workers. |
| 104 | // So in total numberOfWorkers + 1 times for a loop submitting up to numberOfWorkers * 2 tasks to the fixed pool. |
| 105 | expect(poolBusy).toBe(numberOfWorkers + 1) |
| 106 | }) |
| 107 | |
| 108 | it('Verify that tasks queuing is working', async () => { |
| 109 | const promises = new Set() |
| 110 | const maxMultiplier = 3 // Must be greater than tasksConcurrency |
| 111 | for (let i = 0; i < numberOfWorkers * maxMultiplier; i++) { |
| 112 | promises.add(queuePool.execute()) |
| 113 | } |
| 114 | expect(promises.size).toBe(numberOfWorkers * maxMultiplier) |
| 115 | for (const workerNode of queuePool.workerNodes) { |
| 116 | expect(workerNode.usage.tasks.executing).toBeGreaterThanOrEqual(0) |
| 117 | expect(workerNode.usage.tasks.executing).toBeLessThanOrEqual( |
| 118 | queuePool.opts.tasksQueueOptions.concurrency |
| 119 | ) |
| 120 | expect(workerNode.usage.tasks.executed).toBe(0) |
| 121 | expect(workerNode.usage.tasks.queued).toBe( |
| 122 | maxMultiplier - queuePool.opts.tasksQueueOptions.concurrency |
| 123 | ) |
| 124 | expect(workerNode.usage.tasks.maxQueued).toBe( |
| 125 | maxMultiplier - queuePool.opts.tasksQueueOptions.concurrency |
| 126 | ) |
| 127 | expect(workerNode.usage.tasks.stolen).toBe(0) |
| 128 | } |
| 129 | expect(queuePool.info.executedTasks).toBe(0) |
| 130 | expect(queuePool.info.executingTasks).toBe( |
| 131 | numberOfWorkers * queuePool.opts.tasksQueueOptions.concurrency |
| 132 | ) |
| 133 | expect(queuePool.info.queuedTasks).toBe( |
| 134 | numberOfWorkers * |
| 135 | (maxMultiplier - queuePool.opts.tasksQueueOptions.concurrency) |
| 136 | ) |
| 137 | expect(queuePool.info.maxQueuedTasks).toBe( |
| 138 | numberOfWorkers * |
| 139 | (maxMultiplier - queuePool.opts.tasksQueueOptions.concurrency) |
| 140 | ) |
| 141 | expect(queuePool.info.backPressure).toBe(false) |
| 142 | expect(queuePool.info.stolenTasks).toBe(0) |
| 143 | await Promise.all(promises) |
| 144 | for (const workerNode of queuePool.workerNodes) { |
| 145 | expect(workerNode.usage.tasks.executing).toBeGreaterThanOrEqual(0) |
| 146 | expect(workerNode.usage.tasks.executing).toBeLessThanOrEqual( |
| 147 | numberOfWorkers * maxMultiplier |
| 148 | ) |
| 149 | expect(workerNode.usage.tasks.executed).toBe(maxMultiplier) |
| 150 | expect(workerNode.usage.tasks.queued).toBe(0) |
| 151 | expect(workerNode.usage.tasks.maxQueued).toBe( |
| 152 | maxMultiplier - queuePool.opts.tasksQueueOptions.concurrency |
| 153 | ) |
| 154 | expect(workerNode.usage.tasks.stolen).toBeGreaterThanOrEqual(0) |
| 155 | expect(workerNode.usage.tasks.stolen).toBeLessThanOrEqual( |
| 156 | numberOfWorkers * maxMultiplier |
| 157 | ) |
| 158 | } |
| 159 | expect(queuePool.info.executedTasks).toBe(numberOfWorkers * maxMultiplier) |
| 160 | expect(queuePool.info.backPressure).toBe(false) |
| 161 | expect(queuePool.info.stolenTasks).toBeGreaterThanOrEqual(0) |
| 162 | expect(queuePool.info.stolenTasks).toBeLessThanOrEqual( |
| 163 | numberOfWorkers * maxMultiplier |
| 164 | ) |
| 165 | }) |
| 166 | |
| 167 | it('Verify that is possible to have a worker that return undefined', async () => { |
| 168 | const result = await emptyPool.execute() |
| 169 | expect(result).toBeUndefined() |
| 170 | }) |
| 171 | |
| 172 | it('Verify that data are sent to the worker correctly', async () => { |
| 173 | const data = { f: 10 } |
| 174 | const result = await echoPool.execute(data) |
| 175 | expect(result).toStrictEqual(data) |
| 176 | }) |
| 177 | |
| 178 | it('Verify that error handling is working properly:sync', async () => { |
| 179 | const data = { f: 10 } |
| 180 | let taskError |
| 181 | errorPool.emitter.on(PoolEvents.taskError, (e) => { |
| 182 | taskError = e |
| 183 | }) |
| 184 | let inError |
| 185 | try { |
| 186 | await errorPool.execute(data) |
| 187 | } catch (e) { |
| 188 | inError = e |
| 189 | } |
| 190 | expect(inError).toBeDefined() |
| 191 | expect(typeof inError === 'string').toBe(true) |
| 192 | expect(inError).toBe('Error Message from ClusterWorker') |
| 193 | expect(taskError).toStrictEqual({ |
| 194 | name: 'default', |
| 195 | message: 'Error Message from ClusterWorker', |
| 196 | data |
| 197 | }) |
| 198 | expect( |
| 199 | errorPool.workerNodes.some( |
| 200 | (workerNode) => workerNode.usage.tasks.failed === 1 |
| 201 | ) |
| 202 | ).toBe(true) |
| 203 | }) |
| 204 | |
| 205 | it('Verify that error handling is working properly:async', async () => { |
| 206 | const data = { f: 10 } |
| 207 | let taskError |
| 208 | asyncErrorPool.emitter.on(PoolEvents.taskError, (e) => { |
| 209 | taskError = e |
| 210 | }) |
| 211 | let inError |
| 212 | try { |
| 213 | await asyncErrorPool.execute(data) |
| 214 | } catch (e) { |
| 215 | inError = e |
| 216 | } |
| 217 | expect(inError).toBeDefined() |
| 218 | expect(typeof inError === 'string').toBe(true) |
| 219 | expect(inError).toBe('Error Message from ClusterWorker:async') |
| 220 | expect(taskError).toStrictEqual({ |
| 221 | name: 'default', |
| 222 | message: 'Error Message from ClusterWorker:async', |
| 223 | data |
| 224 | }) |
| 225 | expect( |
| 226 | asyncErrorPool.workerNodes.some( |
| 227 | (workerNode) => workerNode.usage.tasks.failed === 1 |
| 228 | ) |
| 229 | ).toBe(true) |
| 230 | }) |
| 231 | |
| 232 | it('Verify that async function is working properly', async () => { |
| 233 | const data = { f: 10 } |
| 234 | const startTime = performance.now() |
| 235 | const result = await asyncPool.execute(data) |
| 236 | const usedTime = performance.now() - startTime |
| 237 | expect(result).toStrictEqual(data) |
| 238 | expect(usedTime).toBeGreaterThanOrEqual(2000) |
| 239 | }) |
| 240 | |
| 241 | it('Shutdown test', async () => { |
| 242 | const exitPromise = waitWorkerEvents(pool, 'exit', numberOfWorkers) |
| 243 | let poolDestroy = 0 |
| 244 | pool.emitter.on(PoolEvents.destroy, () => ++poolDestroy) |
| 245 | await pool.destroy() |
| 246 | const numberOfExitEvents = await exitPromise |
| 247 | expect(numberOfExitEvents).toBe(numberOfWorkers) |
| 248 | expect(poolDestroy).toBe(1) |
| 249 | }) |
| 250 | |
| 251 | it('Verify that cluster pool options are checked', async () => { |
| 252 | const workerFilePath = './tests/worker-files/cluster/testWorker.js' |
| 253 | let pool1 = new FixedClusterPool(numberOfWorkers, workerFilePath) |
| 254 | expect(pool1.opts.env).toBeUndefined() |
| 255 | expect(pool1.opts.settings).toBeUndefined() |
| 256 | await pool1.destroy() |
| 257 | pool1 = new FixedClusterPool(numberOfWorkers, workerFilePath, { |
| 258 | env: { TEST: 'test' }, |
| 259 | settings: { args: ['--use', 'http'], silent: true } |
| 260 | }) |
| 261 | expect(pool1.opts.env).toStrictEqual({ TEST: 'test' }) |
| 262 | expect(pool1.opts.settings).toStrictEqual({ |
| 263 | args: ['--use', 'http'], |
| 264 | silent: true |
| 265 | }) |
| 266 | expect({ ...pool1.opts.settings, exec: workerFilePath }).toStrictEqual({ |
| 267 | args: ['--use', 'http'], |
| 268 | silent: true, |
| 269 | exec: workerFilePath |
| 270 | }) |
| 271 | await pool1.destroy() |
| 272 | }) |
| 273 | |
| 274 | it('Should work even without opts in input', async () => { |
| 275 | const pool1 = new FixedClusterPool( |
| 276 | numberOfWorkers, |
| 277 | './tests/worker-files/cluster/testWorker.js' |
| 278 | ) |
| 279 | const res = await pool1.execute() |
| 280 | expect(res).toStrictEqual({ ok: 1 }) |
| 281 | // We need to clean up the resources after our test |
| 282 | await pool1.destroy() |
| 283 | }) |
| 284 | |
| 285 | it('Verify that a pool with zero worker fails', async () => { |
| 286 | expect( |
| 287 | () => |
| 288 | new FixedClusterPool(0, './tests/worker-files/cluster/testWorker.js') |
| 289 | ).toThrowError('Cannot instantiate a fixed pool with zero worker') |
| 290 | }) |
| 291 | }) |