Function copy

javascript/selenium-webdriver/io/index.js:71–82

* Copies one file to another. * @param {string} src The source file. * @param {string} dst The destination file. * @return {!Promise } A promise for the copied file's path.

(src, dst)

 * @return {!Promise<string>} A promise for the copied file's path.
 */
function copy(src, dst) {
  return new Promise(function (fulfill, reject) {
    const rs = fs.createReadStream(src)
    rs.on('error', reject)

    const ws = fs.createWriteStream(dst)
    ws.on('error', reject)
    ws.on('close', () => fulfill(dst))

    rs.pipe(ws)
  })
}

/**
 * Recursively copies the contents of one directory to another.