message: [jest-cli] Lift `Objecy.keys` call from loop.
diff: @@ -150,8 +150,10 @@ class SearchSource {
  testCases.testPathPattern = path => regex.test(path);
  }
  + const testCasesKeys = Object.keys(testCases);
  +
  data.paths = allPaths.filter(path => {
  - return Object.keys(testCases).reduce((flag, key) => {
  + return testCasesKeys.reduce((flag, key) => {
  if (testCases[key](path)) {
  data.stats[key] = ++data.stats[key] || 1;
  return flag && true;
  