Spotify Radio - JS Expert Week 6.0

Welcome to the sixth Javascript Expert Week. This is the starting code to start our journey.

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Preview

Checklist Features

• Web API

  • [ ] Must achieve 100% code coverage in tests
  • [ ] Must have end to end tests validating all API routes
  • [ ] Must deliver static files as Node.js Streams
  • [ ] Must deliver music files as a Node.js Stream
  • [ ] Given a disconnected user it should not break the API
  • [ ] Even if multiple commands are fired at the same time, it should not break the API
  • [ ] If an unexpected error occurs, the API should keep working
  • [ ] The project needs to run on Linux, Mac and Windows environments

• Web App

  • Client
    • [ ] Must play the broadcast
    • [ ] Shouldn’t pause if any effects are added
  • Controller
    • [ ] Must achieve 100% code coverage in tests
    • [ ] Must be able to start or stop a broadcast
    • [ ] Must send commands to add audio effects to a stream

Tasks per class

• Lesson 01: Cover service and route layers with unit tests and achieve 100% code coverage
• Lesson 02: Maintain 100% code coverage and implement e2e tests for the entire API
• Lesson 03: implement unit tests for the frontend and maintain 100% code coverage
• PLUS:
  • [ ] provide a new effect
    • [ ] add a new button on the controller
    • [ ] add a new effect sound to the audios/fx/ folder
    • [ ] repost on heroku

Source code for classes and solving challenges

• Class01
  • desafio-resolvido and page with 100% code coverage
• Class02
  • desafio-resolvido and page with 100% code coverage
• Class03
  • desafio-resolvido and page with 100% code coverage

Credits to the sources I’ve used on the demos

Streaming

• English Conversation

Effects

• Applause
• Applause Audience
• Boo
• Fart
• Laugh

FAQ

• NODE_OPTIONS is not a system recognized command, what to do?

  • If you are on Windows, the way to create environment variables is different. You must use the word set before the command.
  • Ex: "test": "set NODE_OPTIONS=--experimental-vm-modules && npx jest --runInBand",

• I ran npm test but nothing happens, what to do?

  • Check your Node.js version. We are using version 17. Go to node.js website and download the latest version.

• jest.spyOn - when we try to use function.name (something like stream.pipe.name), it says the instance is undefined

  • In this case, use the value as a string: jest.spyOn(stream, "pipe").mockReturnValue

• Challenge 01 impossible to complete 100% code coverage because testUtil.js is not being fully used

  • Add the following code snippet to the first line of the testUtil.js file: /* istanbul ignore file */ . This will make jest ignore this file and complete 100%.
  • Important: this change will only serve to complete this first and/or second challenge, in the last class, we will not need to ignore this file since we will use all the functions