Add unit and integration tests for @joystick.js/node

[rglover]

[rglover]

Making a note of this for later so I can get it out of the test file:

jest.mock('../../node_modules/express', () => {
  const express = () => {
    return {
      use: jest.fn(),
      get: jest.fn(),
      post: jest.fn(),
      listen: () => {
        return {
          hello: true,
        }
      },
    };
  };

  express.json = () => jest.fn();
  express.static = () => jest.fn();

  return express;
});

In case you get confused, make sure to manually hoist this in the file above the import for the code being tested. If it's run after the import, the mock won't apply. This also applies to any standalone files you're using but not testing. For example:

jest.mock('../../node_modules/crypto-extra', () => {
  return {
    randomString: () => 'abc1234',
  };
});

jest.mock('../../node_modules/bcrypt', () => {
  return {
    hashSync: () => 'hashed$password',
    compareSync: () => {
      return true;
    },
  };
});

const app = (await import('./index')).default;
const generateId = (await import('../lib/generateId')).default;

generateId() here is used in the test file and relies on the crypto-extra package to generate IDs on user signup (indirectly inside of /app/index.js here).