dillon1000/react

Add unit tests for props to attribute mapping in SSR. (#9106)

* Added a handful of SSR unit tests, ported from a previous pull request.

* Fixing linting errors

* Fixed a test helper function to properly report errors.

* Un-nested the new rendering tests. Updated the fiber test passing/not passing lists.

* Edited to comply with the react/jsx-space-before-closing eslint rule, which will soon be merged into master.

* Response to code review from @spicyj. Moved tests to separate file, reworked wording of test names, corrected use of canUseDom, and simplified tests against tagName. Thanks for the help, @spicyj!

* Converted the unit tests to use async-await style.

* Moved async-await babel transform for tests from .babelrc to preprocessor.js.

* Response to code review in PR #9089. Thanks, @spicyj!

* Fixing some bugs in the SSR unit tests.

* Missed deleting some repeated code in the last commit.

* Adding unit tests for property to attribute mapping in SSR.

* Removing some redundant unit tests.

* Oops. I forgot to re-run record-tests after c593dbc; fixing that here.

* Reformatting for prettier so that the build will pass.