Initialize Unit Test

[priambudiLB]

Setup Unit Test and create a sample test for others to follow.

[jonathanfilbert]

We'll try to make a testing guideline for beginners to try and implement. In the meantime, for those who want to help to initialize a test example, folks at Next have provided a detailed guideline regarding testing in Next.JS.

[jpabeem]

I can help with this and like to pick up the task if possible :)