visual-dom-diff/src/config.test.ts at d7a962addf94b301582bb4576ddef8918a4b17ab · Teamwork/visual-dom-diff · GitHub

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import { Diff } from 'diff-match-patch'
import { JSDOM } from 'jsdom'
import { optionsToConfig } from './config'
import { diffText, isComment, isDocumentFragment, isText } from './util'

const document = new JSDOM('').window.document
const text = document.createTextNode('text')
const span = document.createElement('SPAN')
const div = document.createElement('DIV')
const video = document.createElement('VIDEO')
const comment = document.createComment('comment')
const fragment = document.createDocumentFragment()

describe('skipChildren', () => {
    describe('without options', () => {
        const config = optionsToConfig()
        test('return true given a text node', () => {
            expect(config.skipChildren(text)).toBe(true)
        })
        test('return true given a comment node', () => {
            expect(config.skipChildren(comment)).toBe(true)
        })
        test('return false given a SPAN', () => {
            expect(config.skipChildren(span)).toBe(false)
        })
        test('return true given a VIDEO', () => {
            expect(config.skipChildren(video)).toBe(true)
        })
        test('return false given a DIV', () => {
            expect(config.skipChildren(div)).toBe(false)
        })
        test('return false given a document fragment', () => {
            expect(config.skipChildren(fragment)).toBe(false)
        })
        test('return false given a document', () => {
            expect(config.skipChildren(document)).toBe(false)
        })
    })
    describe('with options', () => {
        const config = optionsToConfig({
            skipChildren(node: Node): boolean | undefined {
                return node.nodeName === 'SPAN'
                    ? true
                    : node.nodeName === 'VIDEO'
                    ? false
                    : isText(node) || isComment(node)
                    ? false
                    : isDocumentFragment(node)
                    ? true
                    : undefined
            },
        })
        test('return true given a text node', () => {
            expect(config.skipChildren(text)).toBe(true)
        })
        test('return true given a comment node', () => {
            expect(config.skipChildren(comment)).toBe(true)
        })
        test('return true given a SPAN', () => {
            expect(config.skipChildren(span)).toBe(true)
        })
        test('return false given a VIDEO', () => {
            expect(config.skipChildren(video)).toBe(false)
        })
        test('return false given a DIV', () => {
            expect(config.skipChildren(div)).toBe(false)
        })
        test('return true given a document fragment', () => {
            expect(config.skipChildren(fragment)).toBe(true)
        })
        test('return false given a document', () => {
            expect(config.skipChildren(document)).toBe(false)
        })
    })
})

describe('skipSelf', () => {
    describe('without options', () => {
        const config = optionsToConfig()
        test('return false given a text node', () => {
            expect(config.skipSelf(text)).toBe(false)
        })
        test('return true given a comment node', () => {
            expect(config.skipSelf(comment)).toBe(true)
        })
        test('return true given a SPAN', () => {
            expect(config.skipSelf(span)).toBe(true)
        })
        test('return false given a VIDEO', () => {
            expect(config.skipSelf(video)).toBe(false)
        })
        test('return false given a DIV', () => {
            expect(config.skipSelf(div)).toBe(false)
        })
        test('return true given a document fragment', () => {
            expect(config.skipSelf(fragment)).toBe(true)
        })
    })
    describe('with options', () => {
        const config = optionsToConfig({
            skipSelf(node: Node): boolean | undefined {
                return isText(node)
                    ? true
                    : isComment(node)
                    ? false
                    : isDocumentFragment(node)
                    ? false
                    : node.nodeName === 'SPAN'
                    ? false
                    : node.nodeName === 'VIDEO'
                    ? true
                    : undefined
            },
        })
        test('return true given a text node', () => {
            expect(config.skipSelf(text)).toBe(true)
        })
        test('return true given a comment node', () => {
            expect(config.skipSelf(comment)).toBe(true)
        })
        test('return false given a SPAN', () => {
            expect(config.skipSelf(span)).toBe(false)
        })
        test('return true given a VIDEO', () => {
            expect(config.skipSelf(video)).toBe(true)
        })
        test('return false given a DIV', () => {
            expect(config.skipSelf(div)).toBe(false)
        })
        test('return true given a document fragment', () => {
            expect(config.skipSelf(fragment)).toBe(true)
        })
    })
})

describe('simple options', () => {
    test('default', () => {
        const config = optionsToConfig()
        expect(config.addedClass).toBe('vdd-added')
        expect(config.diffText).toBe(diffText)
        expect(config.modifiedClass).toBe('vdd-modified')
        expect(config.removedClass).toBe('vdd-removed')
        expect(config.skipModified).toBe(false)
        expect(config.ignoreAttributes).toBe(false)
    })
    test('override', () => {
        const customDiffText = (
            _oldText: string,
            _newText: string,
        ): Diff[] => []
        const config = optionsToConfig({
            addedClass: 'ADDED',
            diffText: customDiffText,
            ignoreAttributes: true,
            modifiedClass: 'MODIFIED',
            removedClass: 'REMOVED',
            skipModified: true,
        })
        expect(config.addedClass).toBe('ADDED')
        expect(config.diffText).toBe(customDiffText)
        expect(config.ignoreAttributes).toBe(true)
        expect(config.modifiedClass).toBe('MODIFIED')
        expect(config.removedClass).toBe('REMOVED')
        expect(config.skipModified).toBe(true)
    })
})