doodzik/visual-acceptance-test

const {diffImagePersist, diffImageNoPersist} = require('./imageDiff')
const klaw = require('klaw')

function walk (dir) {
    const length = dir.length
    const items = new Set()
    return new Promise((resolve, reject) => {
        klaw(dir)
            .on('data', item => {
                if (item.path.endsWith('.png')) {
                    // + 1 so we get rid of the / which causes issues with path.resolve
                    items.add(item.path.slice(length + 1))
                }
            })
            .on('error', reject)
            .on('end', () => resolve(items))
    })
}

function diff ({diff, expected, actual, persistDiff = true, threshhold = 5}) {
    return Promise.all([walk(expected), walk(actual)])
        .then(res => {
            const [pastFiles, currentFiles] = res
            const files = Array.from(new Set([...pastFiles, ...currentFiles]))
            return Promise.all(files.map(filename => {
                if (persistDiff) {
                    return diffImagePersist({diffPath: diff, pastPath: expected, currentPath: actual, filename, threshhold})
                } else {
                    return diffImageNoPersist({past: expected, current: actual, filename, threshhold})
                }
            }))
        })
    // TODO nest results & add name and path key -> children
    // .then(results => results)
}

module.exports = {
    diff,
}