chore: Testing

[maxwellmattryan]

Description of change

This PR integrates Jest for testing the Typescript files in packages/shared/lib, which contains mostly business logic for all platforms of Firefly. This will be important for whenever we would like to add new functionality, refactor existing functionality, etc.

I tried integrating Mocha as well, but was not able to successfully setup a mocked DOM environment for testing (despite trying jsdom). For this reason, Jest was chosen as it ships with jsdom making it quite easy to setup.

Changes

• Adds firefly-ci.yml for continuous integration checks (linting will be added later)
• New directory for tests (shared/lib/test) along with sample test file currency.test.ts
  • It's likely that scenarios we add tests for later will require some extra configuration and setup - use shared/lib/test/setup.js

Links to any relevant issues

None

Type of change

• Chore (refactoring, build scripts or anything else that isn't user-facing)

How the change has been tested

Tested on:

• MacOS (Catalina 10.15.7)
• Ubuntu (20.04)

Change checklist

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[maxwellmattryan]

This change exists because it was throwing errors of reading updateActiveProfile of undefined.

[rajivshah3]

Looks great! Just two minor things

[rajivshah3]

Looks great!