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snabbdom/test/unit/attachto.ts

101 lines
2.9 KiB
TypeScript

import { assert } from 'chai'
import { init } from '../../package/init'
import { RemoveHook } from '../../package/hooks'
import { attachTo } from '../../package/helpers/attachto'
import { h } from '../../package/h'
const patch = init([])
describe('attachTo', function () {
let elm: any, vnode0: any
beforeEach(function () {
elm = document.createElement('div')
vnode0 = elm
})
it('adds element to target', function () {
const vnode1 = h('div', [
h('div#wrapper', [
h('div', 'Some element'),
attachTo(elm, h('div#attached', 'Test')),
]),
])
elm = patch(vnode0, vnode1).elm
assert.strictEqual(elm.children.length, 2)
})
it('updates element at target', function () {
const vnode1 = h('div', [
h('div#wrapper', [
h('div', 'Some element'),
attachTo(elm, h('div#attached', 'First text')),
]),
])
const vnode2 = h('div', [
h('div#wrapper', [
h('div', 'Some element'),
attachTo(elm, h('div#attached', 'New text')),
]),
])
elm = patch(vnode0, vnode1).elm
assert.strictEqual(elm.children[0].innerHTML, 'First text')
elm = patch(vnode1, vnode2).elm
assert.strictEqual(elm.children[0].innerHTML, 'New text')
})
it('element can be inserted before modal', function () {
const vnode1 = h('div', [
h('div#wrapper', [
h('div', 'Some element'),
attachTo(elm, h('div#attached', 'Text')),
]),
])
const vnode2 = h('div', [
h('div#wrapper', [
h('div', 'Some element'),
h('div', 'A new element'),
attachTo(elm, h('div#attached', 'Text')),
]),
])
elm = patch(vnode0, vnode1).elm
assert.strictEqual(elm.children[0].innerHTML, 'Text')
elm = patch(vnode1, vnode2).elm
assert.strictEqual(elm.children[0].innerHTML, 'Text')
})
it('removes element at target', function () {
const vnode1 = h('div', [
h('div#wrapper', [
h('div', 'Some element'),
attachTo(elm, h('div#attached', 'First text')),
]),
])
const vnode2 = h('div', [
h('div#wrapper', [
h('div', 'Some element'),
]),
])
elm = patch(vnode0, vnode1).elm
assert.strictEqual(elm.children[0].innerHTML, 'First text')
elm = patch(vnode1, vnode2).elm
assert.strictEqual(elm.children.length, 1)
})
it('remove hook receives real element', function () {
const rm: RemoveHook = (vnode, cb) => {
const elm = vnode.elm as HTMLDivElement
assert.strictEqual(elm.tagName, 'DIV')
assert.strictEqual(elm.innerHTML, 'First text')
cb()
}
const vnode1 = h('div', [
h('div#wrapper', [
h('div', 'Some element'),
attachTo(elm, h('div#attached', { hook: { remove: rm } }, 'First text')),
]),
])
const vnode2 = h('div', [
h('div#wrapper', [
h('div', 'Some element'),
]),
])
elm = patch(vnode0, vnode1).elm
elm = patch(vnode1, vnode2).elm
})
})