New testing strategy

[robcxyz]

Need to adopt some framework for unit / integration tests. e2e is fine (needs freshening up) but everything else is super lacking. This issue isn't about making all the tests but just figuring out strategies / how it hooks into CI

[robcxyz]

What I can do in pytest that I need in a js package

• Marking a test as skippable
• Simple way to iterate through a list of inputs and run a test on each one -> NOT run one test that runs a loop -> We need report for each iteration
• Fixtures that I can share across tests
  • Setup + teardown logic (ie run before and after)
  • Make fixture global to run before all the tests or before each test
• Mocking classes / function calls

JS needs the same