Feature/jest unit tests

[Anzumana]

Enabled the ability to write unit tests so we can make sure that pr's can be merge.
If you have some time we could set up circle ci or travis ci to run them.

[Troto]

In the last jest unit tests commit, shouldn't there be a package.json as well as the lock file? I'm not super familiar with using npm but I thought you usually updated through the non locked file?

[Anzumana]

Hey, so usually you can commit both to the repo. The package lock file ensures that if someone is just trying out the feature. They don't run into any bugs due to differences in the specific version of the dependencies that were installed.

npm recommends to commit it.
https://docs.npmjs.com/files/package-lock.json
This file is intended to be committed into source repositories,