test: add test for worker task function object

[poolifier.git] / tests / worker / abstract-worker.test.mjs

import { expect } from 'expect'
import { restore, stub } from 'sinon'

import {
  ClusterWorker,
  KillBehaviors,
  ThreadWorker,
  WorkerChoiceStrategies
} from '../../lib/index.cjs'
import { DEFAULT_TASK_NAME, EMPTY_FUNCTION } from '../../lib/utils.cjs'

describe('Abstract worker test suite', () => {
  class StubWorkerWithMainWorker extends ThreadWorker {
    constructor (fn, opts) {
      super(fn, opts)
      delete this.mainWorker
    }
  }

  afterEach(() => {
    restore()
  })

  it('Verify worker options default values', () => {
    const worker = new ThreadWorker(() => {})
    expect(worker.opts).toStrictEqual({
      killBehavior: KillBehaviors.SOFT,
      maxInactiveTime: 60000,
      killHandler: EMPTY_FUNCTION
    })
  })

  it('Verify that worker options are checked at worker creation', () => {
    expect(() => new ClusterWorker(() => {}, '')).toThrow(
      new TypeError('opts worker options parameter is not a plain object')
    )
    expect(() => new ClusterWorker(() => {}, { killBehavior: '' })).toThrow(
      new TypeError("killBehavior option '' is not valid")
    )
    expect(() => new ClusterWorker(() => {}, { killBehavior: 0 })).toThrow(
      new TypeError("killBehavior option '0' is not valid")
    )
    expect(() => new ThreadWorker(() => {}, { maxInactiveTime: '' })).toThrow(
      new TypeError('maxInactiveTime option is not an integer')
    )
    expect(() => new ThreadWorker(() => {}, { maxInactiveTime: 0.5 })).toThrow(
      new TypeError('maxInactiveTime option is not an integer')
    )
    expect(() => new ThreadWorker(() => {}, { maxInactiveTime: 0 })).toThrow(
      new TypeError(
        'maxInactiveTime option is not a positive integer greater or equal than 5'
      )
    )
    expect(() => new ThreadWorker(() => {}, { maxInactiveTime: 4 })).toThrow(
      new TypeError(
        'maxInactiveTime option is not a positive integer greater or equal than 5'
      )
    )
    expect(() => new ThreadWorker(() => {}, { killHandler: '' })).toThrow(
      new TypeError('killHandler option is not a function')
    )
    expect(() => new ThreadWorker(() => {}, { killHandler: 0 })).toThrow(
      new TypeError('killHandler option is not a function')
    )
  })

  it('Verify that worker options are set at worker creation', () => {
    const killHandler = () => {
      console.info('Worker received kill message')
    }
    const worker = new ClusterWorker(() => {}, {
      killBehavior: KillBehaviors.HARD,
      maxInactiveTime: 6000,
      killHandler
    })
    expect(worker.opts).toStrictEqual({
      killBehavior: KillBehaviors.HARD,
      maxInactiveTime: 6000,
      killHandler
    })
  })

  it('Verify that taskFunctions parameter is mandatory', () => {
    expect(() => new ClusterWorker()).toThrow(
      new Error('taskFunctions parameter is mandatory')
    )
  })

  it('Verify that taskFunctions parameter is a function or a plain object', () => {
    expect(() => new ClusterWorker(0)).toThrow(
      new TypeError(
        'taskFunctions parameter is not a function or a plain object'
      )
    )
    expect(() => new ClusterWorker('')).toThrow(
      new TypeError(
        'taskFunctions parameter is not a function or a plain object'
      )
    )
    expect(() => new ClusterWorker(true)).toThrow(
      new TypeError(
        'taskFunctions parameter is not a function or a plain object'
      )
    )
    expect(() => new ClusterWorker([])).toThrow(
      new TypeError(
        'taskFunctions parameter is not a function or a plain object'
      )
    )
    expect(() => new ClusterWorker(new Map())).toThrow(
      new TypeError(
        'taskFunctions parameter is not a function or a plain object'
      )
    )
    expect(() => new ClusterWorker(new Set())).toThrow(
      new TypeError(
        'taskFunctions parameter is not a function or a plain object'
      )
    )
    expect(() => new ClusterWorker(new WeakMap())).toThrow(
      new TypeError(
        'taskFunctions parameter is not a function or a plain object'
      )
    )
    expect(() => new ClusterWorker(new WeakSet())).toThrow(
      new TypeError(
        'taskFunctions parameter is not a function or a plain object'
      )
    )
  })

  it('Verify that taskFunctions parameter is not an empty object', () => {
    expect(() => new ClusterWorker({})).toThrow(
      new Error('taskFunctions parameter object is empty')
    )
  })

  it('Verify that taskFunctions parameter with unique function is taken', () => {
    const worker = new ThreadWorker(() => {})
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Object)
    expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Object)
    expect(worker.taskFunctions.size).toBe(2)
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
      worker.taskFunctions.get('fn1')
    )
  })

  it('Verify that taskFunctions parameter with multiple task functions is checked', () => {
    const fn1 = () => {
      return 1
    }
    const fn2 = ''
    expect(() => new ThreadWorker({ '': fn1 })).toThrow(
      new TypeError('A taskFunctions parameter object key is an empty string')
    )
    expect(() => new ThreadWorker({ fn1, fn2 })).toThrow(
      new TypeError(
        "taskFunction object 'taskFunction' property 'undefined' is not a function"
      )
    )
    expect(() => new ThreadWorker({ fn1: { fn1 } })).toThrow(
      new TypeError(
        "taskFunction object 'taskFunction' property 'undefined' is not a function"
      )
    )
    expect(() => new ThreadWorker({ fn2: { taskFunction: fn2 } })).toThrow(
      new TypeError(
        "taskFunction object 'taskFunction' property '' is not a function"
      )
    )
    expect(
      () => new ThreadWorker({ fn1: { taskFunction: fn1, priority: '' } })
    ).toThrow(new TypeError("Invalid priority ''"))
    expect(
      () => new ThreadWorker({ fn1: { taskFunction: fn1, priority: -21 } })
    ).toThrow(new TypeError('Property priority must be between -20 and 19'))
    expect(
      () => new ThreadWorker({ fn1: { taskFunction: fn1, priority: 20 } })
    ).toThrow(new RangeError('Property priority must be between -20 and 19'))
    expect(
      () =>
        new ThreadWorker({
          fn1: { taskFunction: fn1, strategy: 'invalidStrategy' }
        })
    ).toThrow(
      new RangeError("Invalid worker choice strategy 'invalidStrategy'")
    )
  })

  it('Verify that taskFunctions parameter with multiple task functions is taken', () => {
    const fn1 = () => {
      return 1
    }
    const fn2 = () => {
      return 2
    }
    const worker = new ClusterWorker({ fn1, fn2 })
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Object)
    expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Object)
    expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Object)
    expect(worker.taskFunctions.size).toBe(3)
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
      worker.taskFunctions.get('fn1')
    )
  })

  it('Verify that taskFunctions parameter with multiple task functions object is taken', () => {
    const fn1Obj = {
      taskFunction: () => {
        return 1
      },
      priority: 5
    }
    const fn2Obj = {
      taskFunction: () => {
        return 2
      },
      priority: 6,
      strategy: WorkerChoiceStrategies.LESS_BUSY
    }
    const worker = new ThreadWorker({
      fn1: fn1Obj,
      fn2: fn2Obj
    })
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(fn1Obj)
    expect(worker.taskFunctions.get('fn1')).toStrictEqual(fn1Obj)
    expect(worker.taskFunctions.get('fn2')).toStrictEqual(fn2Obj)
    expect(worker.taskFunctions.size).toBe(3)
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
      worker.taskFunctions.get('fn1')
    )
  })

  it('Verify that async kill handler is called when worker is killed', () => {
    const killHandlerStub = stub().returns()
    const worker = new ClusterWorker(() => {}, {
      killHandler: async () => await Promise.resolve(killHandlerStub())
    })
    worker.isMain = false
    worker.handleKillMessage()
    expect(killHandlerStub.calledOnce).toBe(true)
  })

  it('Verify that getMainWorker() throw error if main worker is not set', () => {
    expect(() =>
      new StubWorkerWithMainWorker(() => {}).getMainWorker()
    ).toThrow('Main worker not set')
  })

  it('Verify that hasTaskFunction() is working', () => {
    const fn1 = () => {
      return 1
    }
    const fn2 = () => {
      return 2
    }
    const worker = new ClusterWorker({ fn1, fn2 })
    expect(worker.hasTaskFunction(0)).toStrictEqual({
      status: false,
      error: new TypeError('name parameter is not a string')
    })
    expect(worker.hasTaskFunction('')).toStrictEqual({
      status: false,
      error: new TypeError('name parameter is an empty string')
    })
    expect(worker.hasTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
      status: true
    })
    expect(worker.hasTaskFunction('fn1')).toStrictEqual({ status: true })
    expect(worker.hasTaskFunction('fn2')).toStrictEqual({ status: true })
    expect(worker.hasTaskFunction('fn3')).toStrictEqual({ status: false })
  })

  it('Verify that addTaskFunction() is working', () => {
    const fn1 = () => {
      return 1
    }
    const fn2 = () => {
      return 2
    }
    const fn1Replacement = () => {
      return 3
    }
    const worker = new ThreadWorker(fn1)
    expect(worker.addTaskFunction(0, fn1)).toStrictEqual({
      status: false,
      error: new TypeError('name parameter is not a string')
    })
    expect(worker.addTaskFunction('', fn1)).toStrictEqual({
      status: false,
      error: new TypeError('name parameter is an empty string')
    })
    expect(worker.addTaskFunction('fn3', '')).toStrictEqual({
      status: false,
      error: new TypeError(
        "taskFunction object 'taskFunction' property 'undefined' is not a function"
      )
    })
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Object)
    expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Object)
    expect(worker.taskFunctions.size).toBe(2)
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
      worker.taskFunctions.get('fn1')
    )
    expect(worker.addTaskFunction(DEFAULT_TASK_NAME, fn2)).toStrictEqual({
      status: false,
      error: new Error(
        'Cannot add a task function with the default reserved name'
      )
    })
    worker.addTaskFunction('fn2', fn2)
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Object)
    expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Object)
    expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Object)
    expect(worker.taskFunctions.size).toBe(3)
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
      worker.taskFunctions.get('fn1')
    )
    worker.addTaskFunction('fn1', fn1Replacement)
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Object)
    expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Object)
    expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Object)
    expect(worker.taskFunctions.size).toBe(3)
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
      worker.taskFunctions.get('fn1')
    )
  })

  it('Verify that listTaskFunctionNames() is working', () => {
    const fn1 = () => {
      return 1
    }
    const fn2 = () => {
      return 2
    }
    const worker = new ClusterWorker({ fn1, fn2 })
    expect(worker.listTaskFunctionsProperties()).toStrictEqual([
      { name: DEFAULT_TASK_NAME },
      { name: 'fn1' },
      { name: 'fn2' }
    ])
  })

  it('Verify that setDefaultTaskFunction() is working', () => {
    const fn1 = () => {
      return 1
    }
    const fn2 = () => {
      return 2
    }
    const worker = new ThreadWorker({ fn1, fn2 })
    expect(worker.setDefaultTaskFunction(0, fn1)).toStrictEqual({
      status: false,
      error: new TypeError('name parameter is not a string')
    })
    expect(worker.setDefaultTaskFunction('', fn1)).toStrictEqual({
      status: false,
      error: new TypeError('name parameter is an empty string')
    })
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Object)
    expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Object)
    expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Object)
    expect(worker.taskFunctions.size).toBe(3)
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
      worker.taskFunctions.get('fn1')
    )
    expect(worker.setDefaultTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
      status: false,
      error: new Error(
        'Cannot set the default task function reserved name as the default task function'
      )
    })
    expect(worker.setDefaultTaskFunction('fn3')).toStrictEqual({
      status: false,
      error: new Error(
        'Cannot set the default task function to a non-existing task function'
      )
    })
    worker.setDefaultTaskFunction('fn1')
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
      worker.taskFunctions.get('fn1')
    )
    worker.setDefaultTaskFunction('fn2')
    expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
      worker.taskFunctions.get('fn2')
    )
  })
})