Write Test Suites for Milestone 1

[vvidday]

Test using react-testing-library and Jest.

• Components
  • Navbar
  • Light Mode/Dark Mode
  • Game Loop
  • Buttons

[vvidday]

Commit 9b0f812da1ed297de6a85f9c02abba9bcdf8663b

• Added basic component level testing for main App component
  • According to authors of react-testing-library, it is meant to simulate user experience instead of testing individual components. Hence, we render the main App component and test based on that, instead of testing components like nav in isolation.