Investigate prior art

[jmakeig]

Inspired by:

• https://twitter.com/james_k_nelson/status/1165626350159269888
• https://dlang.org/spec/unittest.html

Experimentation:

• AST Explorer
• Rollup REPL

Look at:

• https://github.com/unassert-js/rollup-plugin-unassert
• https://github.com/rollup/rollup-plugin-strip