Fix issue in jest

Author: jaychsu

bin/test_javascript.js

@@ -1,7 +1,10 @@
 // TODO: wrap this file to a executable command
 // [Configuring Jest](https://facebook.github.io/jest/docs/en/configuration.html)
+
+
 module.exports = {
   "rootDir": "..",
+  "testEnvironment": "node",
   "testRegex": "/(other|topic)/.*(\\.|/)(test|spec)\\.jsx?$",
-  "verbose": true
+  "verbose": true,
 }