webpack/webpack-cli

const fs = require("fs");
const path = require("path");

const BASE_DIR = "test/";

function collectTestFolders(strategy) {
  const testFolder = path.resolve(path.join(process.cwd(), BASE_DIR));

  return extractFolder(testFolder, [], strategy);
}

function extractFolder(folderToRead, folders = [], folderStrategy) {
  let files;

  try {
    files = fs.readdirSync(folderToRead);
  } catch (error) {
    return [];
  }

  if (!files) {
    return [];
  }

  files.forEach((file) => {
    const filePath = path.resolve(path.join(folderToRead, file));
    const stats = fs.statSync(filePath);

    if (folderStrategy(stats, file)) {
      folders.push(folderToRead);
    }

    if (stats.isDirectory() && file !== "node_modules") {
      extractFolder(filePath, folders, folderStrategy);
    }
  });

  return folders;
}

module.exports = collectTestFolders;