Organise tests

[jay-meister]

Currently we have a test called setup test which actually tests addChallenge function

Each function we add to the request object can be made up of:

• Query building functions that return a string
• Helper functions shaping the data that comes back from the DB
• Being added to the request object

Each of these are points that can be tested, in order to keep the functions easy to follow, I want to keep the function names matching the test folders.

tests directory
| - addChallenge
  | - query.test.js
  | - helper.test.js
  | - endpoint.test.js
| - getChallenge
  | - query.test.js
  | - helper.test.js
  | - endpoint.test.js