fix: add types fileds to package.json exports

[poolifier.git] / tests / queue.test.js

const { expect } = require('expect')
const { Queue } = require('../lib/queue')

describe('Queue test suite', () => {
  it('Verify enqueue() behavior', () => {
    const queue = new Queue()
    let rtSize = queue.enqueue(1)
    expect(queue.size).toBe(1)
    expect(rtSize).toBe(queue.size)
    expect(queue.offset).toBe(0)
    expect(queue.maxSize).toBe(1)
    expect(queue.items).toStrictEqual([1])
    rtSize = queue.enqueue(2)
    expect(queue.size).toBe(2)
    expect(rtSize).toBe(queue.size)
    expect(queue.offset).toBe(0)
    expect(queue.maxSize).toBe(2)
    expect(queue.items).toStrictEqual([1, 2])
    rtSize = queue.enqueue(3)
    expect(queue.size).toBe(3)
    expect(rtSize).toBe(queue.size)
    expect(queue.offset).toBe(0)
    expect(queue.maxSize).toBe(3)
    expect(queue.items).toStrictEqual([1, 2, 3])
  })

  it('Verify dequeue() behavior', () => {
    const queue = new Queue()
    queue.enqueue(1)
    queue.enqueue(2)
    queue.enqueue(3)
    let rtItem = queue.dequeue()
    expect(queue.size).toBe(2)
    expect(rtItem).toBe(1)
    expect(queue.offset).toBe(1)
    expect(queue.maxSize).toBe(3)
    expect(queue.items).toStrictEqual([1, 2, 3])
    rtItem = queue.dequeue()
    expect(queue.size).toBe(1)
    expect(rtItem).toBe(2)
    expect(queue.offset).toBe(0)
    expect(queue.maxSize).toBe(3)
    expect(queue.items).toStrictEqual([3])
    rtItem = queue.dequeue()
    expect(queue.size).toBe(0)
    expect(rtItem).toBe(3)
    expect(queue.offset).toBe(0)
    expect(queue.maxSize).toBe(3)
    expect(queue.items).toStrictEqual([])
  })

  it('Verify clear() behavior', () => {
    const queue = new Queue()
    queue.enqueue(1)
    queue.enqueue(2)
    queue.enqueue(3)
    expect(queue.size).toBe(3)
    expect(queue.maxSize).toBe(3)
    queue.clear()
    expect(queue.size).toBe(0)
    expect(queue.maxSize).toBe(0)
    expect(queue.items).toStrictEqual([])
    expect(queue.offset).toBe(0)
  })

  it('Verify iterator behavior', () => {
    const queue = new Queue()
    queue.enqueue(1)
    queue.enqueue(2)
    queue.enqueue(3)
    let i = 1
    for (const item of queue) {
      expect(item).toBe(i)
      ++i
    }
  })
})