Migrate enzyme to testing library

[josiasds]

This PR contains the migration from enzyme to react-testing-library, as requested in #567.

From the docs:

Testing Library has a different approach to testing when compared to Enzyme. What that means is there's not a one-to-one mapping of Enzyme features to React Testing Library features.

React Testing Library encourages you to avoid testing implementation details like the internals of a component you're testing (though it's still possible). The Guiding Principles of this library emphasize a focus on tests that closely resemble how your web pages are interacted by the users.

You may want to avoid the following implementation details:

• Internal state of a component
• Internal methods of a component
• Lifecycle methods of a component
• Child components

Release Notes

Author Checklist

• [x] Setup RTL side-by-side with Enzyme in order to migrate components progressively
• [x] Migrate ColorPicker (depends on https://github.com/LaunchPadLab/lp-components/pull/596)
• [x] Incorporate code review feedback on feature branch
• [x] Merge PRs containing subsets of migrated tests
• [x] Remove Enzyme (and adapter) libs and setup

Components to migrate:

• [x] /controls (#602)

  • [x] paginator
  • [x] color-picker (depends on #596)
  • [x] tab-bar

• [x] /forms

  • [x] /buttons (in review in this PR #586)
  • [x] button-area
  • [x] button
  • [x] submit-button
  • [x] /labels (#607)
  • [x] error-label
  • [x] input-error
  • [x] input-label
  • [x] labeled-field
  • [x] /inputs
  • [x] cloudinary-uploader
  • [x] checkbox-group
  • [x] checkbox
  • [x] cloudinary-file-input (#590)
  • [x] color-input
  • [x] date-input
  • [x] dropdown-checkbox-group
  • [x] file-input (#590)
  • [x] hidden-input
  • [x] icon-input
  • [x] input
  • [x] masked-input
  • [x] radio-group
  • [x] range-input
  • [x] select
  • [x] switch
  • [x] textarea

• [x] /indicators (#600)

  • [x] flash-message-container
  • [x] flash-message
  • [x] loading-container
  • [x] spinner (in review in this PR)

• [x] /tables (#603)

  • [x] sortable-table
  • [x] table-column
  • [x] table

• [x] modal (#601)

• [x] Add unit test(s)

• [x] Update version in package.json (see the versioning guidelines)

• [ ] Update documentation (if necessary)

• [ ] Add story to storybook (if necessary)

• [x] Assign dev reviewer

[josiasds]

@chawes13 I updated all the files currently in this PR and addressed all comments. Let me know your thoughts, and then we can merge the separate PRs into this branch.

[chawes13]

@josiasds I merged the latest release on main into and migrated color picker tests. LMK what else you need from me!

[josiasds]

@chawes13 I can't approve this PR since I'm the author, but it's ready!

[chawes13]

Thanks @josiasds! I want to fix the test coverage regression before we officially go-live with this. I'll tackle that first thing when I'm back 🙂

[josiasds]

@chawes13 I just reviewed your latest changes, looking good. Mocking isServer is the best approach in my opinion.

[chawes13]

@josiasds Ready for ya! We got to 100% coverage 😎