Unit Testing/Jest/Install Jest

Create a JavaScript test environment.
 * 1) Install Node.js from Node.js.
 * 2) In a new folder, create a new node package.
 * 3) * Use default responses for everything except 'test command'. For 'test command', enter.
 * 4) Install Jest using:
 * 5) Install the Jest command-line interface using:
 * 1) Install the Jest command-line interface using:
 * 1) Install the Jest command-line interface using: