| 1 | const { expect } = require('expect') |
| 2 | const { FixedClusterPool } = require('../../../lib/index') |
| 3 | const WorkerFunctions = require('../../test-types') |
| 4 | const TestUtils = require('../../test-utils') |
| 5 | |
| 6 | describe('Fixed cluster pool test suite', () => { |
| 7 | const numberOfWorkers = 6 |
| 8 | const pool = new FixedClusterPool( |
| 9 | numberOfWorkers, |
| 10 | './tests/worker-files/cluster/testWorker.js', |
| 11 | { |
| 12 | errorHandler: e => console.error(e) |
| 13 | } |
| 14 | ) |
| 15 | const emptyPool = new FixedClusterPool( |
| 16 | numberOfWorkers, |
| 17 | './tests/worker-files/cluster/emptyWorker.js', |
| 18 | { exitHandler: () => console.log('empty pool worker exited') } |
| 19 | ) |
| 20 | const echoPool = new FixedClusterPool( |
| 21 | numberOfWorkers, |
| 22 | './tests/worker-files/cluster/echoWorker.js' |
| 23 | ) |
| 24 | const errorPool = new FixedClusterPool( |
| 25 | numberOfWorkers, |
| 26 | './tests/worker-files/cluster/errorWorker.js', |
| 27 | { |
| 28 | errorHandler: e => console.error(e) |
| 29 | } |
| 30 | ) |
| 31 | const asyncErrorPool = new FixedClusterPool( |
| 32 | numberOfWorkers, |
| 33 | './tests/worker-files/cluster/asyncErrorWorker.js', |
| 34 | { |
| 35 | errorHandler: e => console.error(e) |
| 36 | } |
| 37 | ) |
| 38 | const asyncPool = new FixedClusterPool( |
| 39 | numberOfWorkers, |
| 40 | './tests/worker-files/cluster/asyncWorker.js' |
| 41 | ) |
| 42 | |
| 43 | after('Destroy all pools', async () => { |
| 44 | // We need to clean up the resources after our test |
| 45 | await echoPool.destroy() |
| 46 | await asyncPool.destroy() |
| 47 | await errorPool.destroy() |
| 48 | await asyncErrorPool.destroy() |
| 49 | await emptyPool.destroy() |
| 50 | }) |
| 51 | |
| 52 | it('Choose worker round robin test', async () => { |
| 53 | const results = new Set() |
| 54 | for (let i = 0; i < numberOfWorkers; i++) { |
| 55 | results.add(pool.chooseWorker().id) |
| 56 | } |
| 57 | expect(results.size).toBe(numberOfWorkers) |
| 58 | }) |
| 59 | |
| 60 | it('Verify that the function is executed in a worker cluster', async () => { |
| 61 | let result = await pool.execute({ |
| 62 | function: WorkerFunctions.fibonacci |
| 63 | }) |
| 64 | expect(result).toBe(false) |
| 65 | result = await pool.execute({ |
| 66 | function: WorkerFunctions.factorial |
| 67 | }) |
| 68 | expect(result).toBe(false) |
| 69 | }) |
| 70 | |
| 71 | it('Verify that is possible to invoke the execute method without input', async () => { |
| 72 | const result = await pool.execute() |
| 73 | expect(result).toBe(false) |
| 74 | }) |
| 75 | |
| 76 | it('Verify that busy event is emitted', async () => { |
| 77 | const promises = [] |
| 78 | let poolBusy = 0 |
| 79 | pool.emitter.on('busy', () => poolBusy++) |
| 80 | for (let i = 0; i < numberOfWorkers * 2; i++) { |
| 81 | promises.push(pool.execute()) |
| 82 | } |
| 83 | // The `busy` event is triggered when the number of submitted tasks at once reach the number of fixed pool workers. |
| 84 | // So in total numberOfWorkers + 1 times for a loop submitting up to numberOfWorkers * 2 tasks to the fixed pool. |
| 85 | expect(poolBusy).toBe(numberOfWorkers + 1) |
| 86 | }) |
| 87 | |
| 88 | it('Verify that is possible to have a worker that return undefined', async () => { |
| 89 | const result = await emptyPool.execute() |
| 90 | expect(result).toBeUndefined() |
| 91 | }) |
| 92 | |
| 93 | it('Verify that data are sent to the worker correctly', async () => { |
| 94 | const data = { f: 10 } |
| 95 | const result = await echoPool.execute(data) |
| 96 | expect(result).toStrictEqual(data) |
| 97 | }) |
| 98 | |
| 99 | it('Verify that error handling is working properly:sync', async () => { |
| 100 | const data = { f: 10 } |
| 101 | let inError |
| 102 | try { |
| 103 | await errorPool.execute(data) |
| 104 | } catch (e) { |
| 105 | inError = e |
| 106 | } |
| 107 | expect(inError).toBeDefined() |
| 108 | expect(typeof inError === 'string').toBe(true) |
| 109 | expect(inError).toBe('Error Message from ClusterWorker') |
| 110 | }) |
| 111 | |
| 112 | it('Verify that error handling is working properly:async', async () => { |
| 113 | const data = { f: 10 } |
| 114 | let inError |
| 115 | try { |
| 116 | await asyncErrorPool.execute(data) |
| 117 | } catch (e) { |
| 118 | inError = e |
| 119 | } |
| 120 | expect(inError).toBeDefined() |
| 121 | expect(typeof inError === 'string').toBe(true) |
| 122 | expect(inError).toBe('Error Message from ClusterWorker:async') |
| 123 | }) |
| 124 | |
| 125 | it('Verify that async function is working properly', async () => { |
| 126 | const data = { f: 10 } |
| 127 | const startTime = new Date().getTime() |
| 128 | const result = await asyncPool.execute(data) |
| 129 | const usedTime = new Date().getTime() - startTime |
| 130 | expect(result).toStrictEqual(data) |
| 131 | expect(usedTime).toBeGreaterThanOrEqual(2000) |
| 132 | }) |
| 133 | |
| 134 | it('Shutdown test', async () => { |
| 135 | const exitPromise = TestUtils.waitExits(pool, numberOfWorkers) |
| 136 | await pool.destroy() |
| 137 | const numberOfExitEvents = await exitPromise |
| 138 | expect(numberOfExitEvents).toBe(numberOfWorkers) |
| 139 | }) |
| 140 | |
| 141 | it('Should work even without opts in input', async () => { |
| 142 | const pool1 = new FixedClusterPool( |
| 143 | numberOfWorkers, |
| 144 | './tests/worker-files/cluster/testWorker.js' |
| 145 | ) |
| 146 | const res = await pool1.execute() |
| 147 | expect(res).toBe(false) |
| 148 | // We need to clean up the resources after our test |
| 149 | await pool1.destroy() |
| 150 | }) |
| 151 | |
| 152 | it('Verify that a pool with zero worker fails', async () => { |
| 153 | expect( |
| 154 | () => |
| 155 | new FixedClusterPool(0, './tests/worker-files/cluster/testWorker.js') |
| 156 | ).toThrowError(new Error('Cannot instantiate a fixed pool with no worker')) |
| 157 | }) |
| 158 | }) |