mobx/test/base/array.js at master · JavaScriptExpert/mobx

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"use strict"

var mobx = require("../../src/mobx.ts")

const { observable, $mobx, when, _getAdministration } = mobx

var iterall = require("iterall")

function buffer() {

var b = []

var res = function(newValue) {

b.push(newValue)

}

res.toArray = function() {

return b

}

return res

}

test("test1", function() {

var a = observable.array([])

expect(a.length).toBe(0)

expect(Object.keys(a)).toEqual([])

expect(a.slice()).toEqual([])

a.push(1)

expect(a.length).toBe(1)

expect(a.slice()).toEqual([1])

a[1] = 2

expect(a.length).toBe(2)

expect(a.slice()).toEqual([1, 2])

var sum = mobx.computed(function() {

return (

-1 +

a.reduce(function(a, b) {

return a + b

}, 1)

)

})

expect(sum.get()).toBe(3)

a[1] = 3

expect(a.length).toBe(2)

expect(a.slice()).toEqual([1, 3])

expect(sum.get()).toBe(4)

a.splice(1, 1, 4, 5)

expect(a.length).toBe(3)

expect(a.slice()).toEqual([1, 4, 5])

expect(sum.get()).toBe(10)

a.replace([2, 4])

expect(sum.get()).toBe(6)

a.splice(1, 1)

expect(sum.get()).toBe(2)

expect(a.slice()).toEqual([2])

a.spliceWithArray(0, 0, [4, 3])

expect(sum.get()).toBe(9)

expect(a.slice()).toEqual([4, 3, 2])

a.clear()

expect(sum.get()).toBe(0)

expect(a.slice()).toEqual([])

a.length = 4

expect(isNaN(sum.get())).toBe(true)

expect(a.length).toEqual(4)

expect(a.slice()).toEqual([undefined, undefined, undefined, undefined])

a.replace([1, 2, 2, 4])

expect(sum.get()).toBe(9)

a.length = 4

expect(sum.get()).toBe(9)

a.length = 2

expect(sum.get()).toBe(3)

expect(a.slice()).toEqual([1, 2])

expect(a.slice().reverse()).toEqual([2, 1])

expect(a.slice()).toEqual([1, 2])

a.unshift(3)

expect(a.slice().sort()).toEqual([1, 2, 3])

expect(a.slice()).toEqual([3, 1, 2])

expect(JSON.stringify(a)).toBe("[3,1,2]")

expect(a.get(1)).toBe(1)

a.set(2, 4)

expect(a.get(2)).toBe(4)

expect(Object.keys(a)).toEqual(["0", "1", "2"]) // ideally....

})

test("array should support iterall / iterable ", () => {

var a = observable([1, 2, 3])

expect(iterall.isIterable(a)).toBe(true)

expect(iterall.isArrayLike(a)).toBe(true)

var values = []

iterall.forEach(a, v => values.push(v))

expect(values).toEqual([1, 2, 3])

var iter = iterall.getIterator(a)

expect(iter.next()).toEqual({ value: 1, done: false })

expect(iter.next()).toEqual({ value: 2, done: false })

expect(iter.next()).toEqual({ value: 3, done: false })

expect(iter.next()).toEqual({ value: undefined, done: true })

a.replace([])

iter = iterall.getIterator(a)

expect(iter.next()).toEqual({ value: undefined, done: true })

})

test("find(findIndex) and remove", function() {

var a = mobx.observable([10, 20, 20])

var idx = -1

function predicate(item, index) {

if (item === 20) {

idx = index

return true

}

return false

}

;[].findIndex

expect(a.find(predicate)).toBe(20)

expect(a.findIndex(predicate)).toBe(1)

expect(a.find(predicate)).toBe(20)

expect(a.remove(20)).toBe(true)

expect(a.find(predicate)).toBe(20)

expect(idx).toBe(1)

expect(a.findIndex(predicate)).toBe(1)

idx = -1

expect(a.remove(20)).toBe(true)

expect(a.find(predicate)).toBe(undefined)

expect(idx).toBe(-1)

expect(a.findIndex(predicate)).toBe(-1)

expect(a.remove(20)).toBe(false)

})

test("concat should automatically slice observable arrays, #260", () => {

var a1 = mobx.observable([1, 2])

var a2 = mobx.observable([3, 4])

expect(a1.concat(a2)).toEqual([1, 2, 3, 4])

})

test("observe", function() {

var ar = mobx.observable([1, 4])

var buf = []

var disposer = ar.observe(function(changes) {

buf.push(changes)

}, true)

ar[1] = 3 // 1,3

ar[2] = 0 // 1, 3, 0

ar.shift() // 3, 0

ar.push(1, 2) // 3, 0, 1, 2

ar.splice(1, 2, 3, 4) // 3, 3, 4, 2

expect(ar.slice()).toEqual([3, 3, 4, 2])

ar.splice(6)

ar.splice(6, 2)

ar.replace(["a"])

ar.pop()

ar.pop() // does not fire anything

// check the object param

buf.forEach(function(change) {

expect(change.object).toBe(ar)

delete change.object

})

var result = [

{ type: "splice", index: 0, addedCount: 2, removed: [], added: [1, 4], removedCount: 0 },

{ type: "update", index: 1, oldValue: 4, newValue: 3 },

{ type: "splice", index: 2, addedCount: 1, removed: [], added: [0], removedCount: 0 },

{ type: "splice", index: 0, addedCount: 0, removed: [1], added: [], removedCount: 1 },

{ type: "splice", index: 2, addedCount: 2, removed: [], added: [1, 2], removedCount: 0 },

{

type: "splice",

index: 1,

addedCount: 2,

removed: [0, 1],

added: [3, 4],

removedCount: 2

{

type: "splice",

index: 0,

addedCount: 1,

removed: [3, 3, 4, 2],

added: ["a"],

removedCount: 4

{ type: "splice", index: 0, addedCount: 0, removed: ["a"], added: [], removedCount: 1 }

]

expect(buf).toEqual(result)

disposer()

ar[0] = 5

expect(buf).toEqual(result)

})

test("array modification1", function() {

var a = mobx.observable([1, 2, 3])

var r = a.splice(-10, 5, 4, 5, 6)

expect(a.slice()).toEqual([4, 5, 6])

expect(r).toEqual([1, 2, 3])

})

test("serialize", function() {

var a = [1, 2, 3]

var m = mobx.observable(a)

expect(JSON.stringify(m)).toEqual(JSON.stringify(a))

expect(a).toEqual(m.slice())

a = [4]

m.replace(a)

expect(JSON.stringify(m)).toEqual(JSON.stringify(a))

expect(a).toEqual(m.toJSON())

})

test("array modification functions", function() {

var ars = [[], [1, 2, 3]]

var funcs = ["push", "pop", "shift", "unshift"]

funcs.forEach(function(f) {

ars.forEach(function(ar) {

var a = ar.slice()

var b = mobx.observable(a)

var res1 = a[f](4)

var res2 = b[f](4)

expect(res1).toEqual(res2)

expect(a).toEqual(b.slice())

})

test("array modifications", function() {

var a2 = mobx.observable([])

var inputs = [undefined, -10, -4, -3, -1, 0, 1, 3, 4, 10]

var arrays = [

[],

[1],

[1, 2, 3, 4],

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11],

[1, undefined],

[undefined]

]

for (var i = 0; i < inputs.length; i++)

for (var j = 0; j < inputs.length; j++)

for (var k = 0; k < arrays.length; k++)

for (var l = 0; l < arrays.length; l++) {

var msg = [

"array mod: [",

arrays[k].toString(),

"] i: ",

inputs[i],

" d: ",

inputs[j],

" [",

arrays[l].toString(),

"]"

].join(" ")

var a1 = arrays[k].slice()

a2.replace(a1)

var res1 = a1.splice.apply(a1, [inputs[i], inputs[j]].concat(arrays[l]))

var res2 = a2.splice.apply(a2, [inputs[i], inputs[j]].concat(arrays[l]))

expect(a1.slice()).toEqual(a2.slice())

expect(res1).toEqual(res2)

expect(a1.length).toBe(a2.length)

}

})

test("is array", function() {

var x = mobx.observable([])

expect(x instanceof Array).toBe(true)

// would be cool if this would return true...

expect(Array.isArray(x)).toBe(true)

})

test("stringifies same as ecma array", function() {

const x = mobx.observable([])

expect(x instanceof Array).toBe(true)

// would be cool if these two would return true...

expect(x.toString()).toBe("")

expect(x.toLocaleString()).toBe("")

x.push(1, 2)

expect(x.toString()).toBe("1,2")

expect(x.toLocaleString()).toBe("1,2")

})

test("observes when stringified", function() {

const x = mobx.observable([])

let c = 0

mobx.autorun(function() {

x.toString()

c++

})

x.push(1)

expect(c).toBe(2)

})

test("observes when stringified to locale", function() {

const x = mobx.observable([])

let c = 0

mobx.autorun(function() {

x.toLocaleString()

c++

})

x.push(1)

expect(c).toBe(2)

})

test("react to sort changes", function() {

var x = mobx.observable([4, 2, 3])

var sortedX = mobx.computed(function() {

return x.slice().sort()

})

var sorted

mobx.autorun(function() {

sorted = sortedX.get()

})

expect(x.slice()).toEqual([4, 2, 3])

expect(sorted).toEqual([2, 3, 4])

x.push(1)

expect(x.slice()).toEqual([4, 2, 3, 1])

expect(sorted).toEqual([1, 2, 3, 4])

x.shift()

expect(x.slice()).toEqual([2, 3, 1])

expect(sorted).toEqual([1, 2, 3])

})

test("autoextend buffer length", function() {

var ar = observable(new Array(1000))

var changesCount = 0

ar.observe(changes => ++changesCount)

ar[ar.length] = 0

ar.push(0)

expect(changesCount).toBe(2)

})

test("array exposes correct keys", () => {

var keys = []

var ar = observable([1, 2])

for (var key in ar) keys.push(key)

expect(keys).toEqual(["0", "1"])

})

test("isArrayLike", () => {

var arr = [0, 1, 2]

var observableArr = observable(arr)

var isArrayLike = mobx.isArrayLike

expect(typeof isArrayLike).toBe("function")

expect(isArrayLike(observableArr)).toBe(true)

expect(isArrayLike(arr)).toBe(true)

expect(isArrayLike(42)).toBe(false)

expect(isArrayLike({})).toBe(false)

})

test("accessing out of bound values throws", () => {

const a = mobx.observable([])

var warns = 0

const baseWarn = console.warn

console.warn = () => {

warns++

}

a[0] // out of bounds

a[1] // out of bounds

expect(warns).toBe(2)

expect(() => (a[0] = 3)).not.toThrow()

expect(() => (a[2] = 4)).toThrow(/Index out of bounds, 2 is larger than 1/)

console.warn = baseWarn

})

test("replace can handle large arrays", () => {

const a = mobx.observable([])

const b = []

b.length = 1000 * 1000

expect(() => {

a.replace(b)

}).not.toThrow()

expect(() => {

a.spliceWithArray(0, 0, b)

}).not.toThrow()

})

test("can iterate arrays", () => {

const x = mobx.observable([])

const y = []

const d = mobx.reaction(() => Array.from(x), items => y.push(items), { fireImmediately: true })

x.push("a")

x.push("b")

expect(y).toEqual([[], ["a"], ["a", "b"]])

d()

})

test("array is concat spreadable, #1395", () => {

const x = mobx.observable([1, 2, 3, 4])

const y = [5].concat(x)

expect(y.length).toBe(5)

expect(y).toEqual([5, 1, 2, 3, 4])

})

test("array is spreadable, #1395", () => {

const x = mobx.observable([1, 2, 3, 4])

expect([5, ...x]).toEqual([5, 1, 2, 3, 4])

const y = mobx.observable([])

expect([5, ...y]).toEqual([5])

})

test("array supports toStringTag, #1490", () => {

// N.B. on old environments this requires polyfils for these symbols *and* Object.prototype.toString.

// core-js provides both

const a = mobx.observable([])

expect(Object.prototype.toString.call(a)).toBe("[object Array]")

})

test("slice works", () => {

const a = mobx.observable([1, 2, 3])

expect(a.slice(0, 2)).toEqual([1, 2])

})

test("slice is reactive", () => {

const a = mobx.observable([1, 2, 3])

let ok = false

when(() => a.slice().length === 4, () => (ok = true))

expect(ok).toBe(false)

a.push(1)

expect(ok).toBe(true)

})

test("toString", () => {

expect(mobx.observable([1, 2]).toString()).toEqual([1, 2].toString())

expect(mobx.observable([1, 2]).toLocaleString()).toEqual([1, 2].toLocaleString())

})

test("can define properties on arrays", () => {

const ar = observable.array([1, 2])

Object.defineProperty(ar, "toString", {

enumerable: false,

configurable: true,

value: function() {

return "hoi"

}

})

expect(ar.toString()).toBe("hoi")

expect("" + ar).toBe("hoi")

})

test("concats correctly #1667", () => {

const x = observable({ data: [] })

function generate(count) {

const d = []

for (let i = 0; i < count; i++) d.push({})

return d

}

x.data = generate(10000)

const first = x.data[0]

expect(Array.isArray(x.data)).toBe(true)

x.data = x.data.concat(generate(1000))

expect(Array.isArray(x.data)).toBe(true)

expect(x.data[0]).toBe(first)

expect(x.data.length).toBe(11000)

})

test("dehances last value on shift/pop", () => {

const x1 = observable([3, 5])

_getAdministration(x1).dehancer = value => {

return value * 2

}

expect(x1.shift()).toBe(6)

expect(x1.shift()).toBe(10)

const x2 = observable([3, 5])

_getAdministration(x2).dehancer = value => {

return value * 2

}

expect(x2.pop()).toBe(10)

expect(x2.pop()).toBe(6)

})

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