uvu 0.5.6 regression: CLI runner fails on Node.js 10

[ludofischer]

On GitHub actions with Node.js 10, running : uvu packages "test.*\.js$" fails to run any tests and crashes with this stack trace:

ReferenceError: globalThis is not defined
    at Object.exports.run (/home/runner/work/cssnano/cssnano/node_modules/.pnpm/uvu@0.5.6/node_modules/uvu/run/index.js:2:2)
    at sade.version.option.option.option.option.option.action (/home/runner/work/cssnano/cssnano/node_modules/.pnpm/uvu@0.5.6/node_modules/uvu/bin.js:28:30)

The tests run as expected with uvu 0.5.5 on the same configuration.

Link to CI failure: https://github.com/cssnano/cssnano/runs/7240283115?check_suite_focus=true
Node.js version: 10.24.1
OS: Ubuntu

[kytta]

Don't ask me why, but I was testing a package for Node.js v10 in 2023, and I stumbled upon this bug :D

The regression seems to come from the re-arrangement of the imports in uvu 0.5.6. Now, uvu/run imports uvu after a reference to globalThis, which is something that needs polyfilling. uvu itself, as well as esm (the package) actually take care of this, but running uvu -r esm will polyfill globalThis after it gets referenced.

Workaround: Run tests using node -r esm tests instead of uvu -r esm tests

To resolve this bug, one need to either: a) require esm before requiring uvu/run; or b) move the included globalThis polyfill all the way up to bin.js