Integrate with mocha and write tests

[imor]

No description provided.

[houd1ni]

How about Jasmine?

[imor]

Go ahead, I don't think I have a strong preference for mocha. Something is better than nothing.

[valera-rozuvan]

Do you want unit tests of actual JS functions, or e2e tests of actually running the code on some chess games?

[imor]

You can start with unit tests and later add integration tests with actual chess engines.

[valera-rozuvan]

I am writing JS unit tests, and running them using karma. Karma requires a recent Node.js version. From their docs:

Karma currently works on Node.js 4.x, 5.x, 6.x, 7.x, and 8.x. See FAQ for more info. 

Are you OK with bumping engines.node to >=4.0 in package.json?

[valera-rozuvan]

I decided to just use mocha 😄 But it also requires Node v4 or higher. See their docs:

To install Mocha v3.0.0 or newer with npm, you will need npm v2.14.2 or newer.
Additionally, to run Mocha, you will need Node.js v4 or newer.

[valera-rozuvan]

Here is the initial PR #26 .

[imor]

Thanks 👍. Merged.