message: Create cache directory if it doesn't exist
diff: @@ -37,6 +37,9 @@ function processResult(result: Result): Result {
  let coveredFiles = [];
  let basepath = path.join(jestConfig.cacheDirectory, '/ts-jest/');
  + if (!fs.existsSync(basepath)) {
  + fs.mkdirSync(basepath)
  + }
  let cachedFiles = fs.readdirSync(basepath);
  cachedFiles.map((p) => {
  let filename = new Buffer(p.replace(basepath, ''), 'base64').toString('utf8');
  