Tests require manual review

[Dan-Shields]

The current testing methodology requires building the plugin locally, building the test-bundle fixture using that the local plugin build, and then manually examining the output. A git diff can be of some use, but currently only the production build artifacts exist in the repository.

A script could be made to automate this. Build the plugin, copy the test-bundle to a playground directory, build the test-bundle, then use something like dir-compare to compare the result to the original test-bundle directory.