mobx-utils/test/queue-processor.js

"use strict"

const utils = require("../")
const mobx = require("mobx")
const test = require("tape")

mobx.useStrict(true)

test("sync processor should work", t => {
    const q = mobx.observable([1, 2])
    const res = []

    const stop = utils.queueProcessor(q, v => res.push(v * 2))

    t.deepEqual(res, [2, 4])
    t.equal(q.length, 0)

    mobx.runInAction(() => q.push(3))
    t.deepEqual(res, [2, 4, 6])

    mobx.runInAction(() => q.push(4, 5))
    t.equal(q.length, 0)
    t.deepEqual(res, [2, 4, 6, 8, 10])

    mobx.runInAction(() => {
        q.unshift(6, 7)
        t.equal(q.length, 2)
        t.deepEqual(res, [2, 4, 6, 8, 10])
    })

    t.equal(q.length, 0)
    t.deepEqual(res, [2, 4, 6, 8, 10, 12, 14])

    stop()
    mobx.runInAction(() => q.push(42))
    t.equal(q.length, 1)
    t.deepEqual(res, [2, 4, 6, 8, 10, 12, 14])

    t.end()
})

test("async processor should work", t => {
    const q = mobx.observable([1, 2])
    const res = []

    const stop = utils.queueProcessor(q, v => res.push(v * 2), 10)

    t.equal(res.length, 0)
    t.equal(q.length, 2)

    setTimeout(() => {
        t.deepEqual(res, [2, 4])
        t.equal(q.length, 0)

        mobx.runInAction(() => q.push(3))
        t.equal(q.length, 1)
        t.deepEqual(res, [2, 4])

        setTimeout(() => {
            t.equal(q.length, 0)
            t.deepEqual(res, [2, 4, 6])

            stop()
            t.end()
        }, 50)
    }, 50)
})