Rtl upgrade (#218)

* Moved all tests to RTL
* Updated testing config
* Removed un-needed library
* Updated tests to better checks
* Removed un-needed comments

Author: AlexanderKaran

jest.setup.js

@@ -1,8 +1,4 @@
 import React from 'react';
-import Adapter from 'enzyme-adapter-react-16';
 import '@testing-library/jest-dom/extend-expect';
-import { configure } from 'enzyme';
-
-configure({ adapter: new Adapter() });
 
 React.useLayoutEffect = React.useEffect;