Add jest as a test framework

[ewatch]

Is your feature request related to a problem? Please describe.
Automatically testing certain parts of the JavaScript logic

Describe the solution you'd like
Add jest as dev-dependency

I could take care of this and make a first example test.

[uzaxirr]

Yea sure if u can make a PR please Go ahead

[ewatch]

Okay great. I will take care.

[ewatch]

Hi,
I already started working on it. Will continue at the weekend.
Sorry for the delay.

[uzaxirr]

Hi, I already started working on it. Will continue at the weekend. Sorry for the delay.

No Problem 😄