Function createChunks

lib/command/run-multiple/chunk.js:64–90

(config, patterns = [])

 * the splitting.
 */
const createChunks = (config, patterns = []) => {
  const files = patterns
    .filter(pattern => !!pattern)
    .map(pattern => {
      return findFiles(pattern).filter(file => {
        return config.grep ? grepFile(file, config.grep) : true
      })
    })
    .reduce((acc, val) => acc.concat(val), [])

  let chunks = []
  if (typeof config.chunks === 'function') {
    chunks = config.chunks.call(this, files)
  } else if (typeof config.chunks === 'number' || typeof config.chunks === 'string') {
    chunks = splitFiles(files, Math.ceil(files.length / config.chunks))
  } else {
    throw new Error('chunks is neither a finite number or a valid function')
  }

  const chunkConfig = { ...config }
  delete chunkConfig.chunks

  return chunks.map(chunkFiles => {
    const { js, gherkin } = mapFileFormats(chunkFiles)
    return { ...chunkConfig, tests: flattenFiles(js), gherkin: { features: flattenFiles(gherkin) } }
  })
}

export {
  createChunks