Backend Tests

Testing tools used:

• jest

  • Allows easy testing of any JS code
  • Allows use of mocks
  • Allows use of spies

• mockingoose

  • Allows mocking of Mongoose models
  • Can mock Mongoose method calls on the models

• mongodb-memory-server

  • Allows mocking of a MongoDb server
  • Creates an in-memory database

Testing the vanilla JS code

Testing of the backend's methods was done, namely the methods that make API calls to Spotify's API. This required the following:

• Mocking of the node-fetch module, which was used to make API calls
• Checking the number of calls to the fetch method
• Checking the inputs to the fetch method

Testing the Mongoose Models + MongoDb

Metrinom has one model - User. This stores user information made to use API calls and display non-sensitive user data on the frontend. User JSON objects are stored in a collection of the MongoDb database. This required the following:

• Use of monogodb-memory-server to mock a database
• Checking retrieval, creation and deletion of User objects from/to the database

Testing the Express API