Cannot exclude test files from rollup bundle

[nrabinowitz]

I'm using rollup to bundle a library I'm working on, using ES2015 import/export. My current test approach is to bundle my tests along with the code under test:

rollup test/index.js --file dist/test.js --sourcemap --format=cjs

This allows me to run the tests under Node, and use nyc like so:

nyc --clean -x 'test/**' node dist/test.js

The test coverage shows that the sourcemaps are recognized and used - the coverage is broken out properly by source file. However, the -x/--exclude param is not properly excluding tests or other files I want to exclude, and these show up in the coverage report. I have tried every glob combination of test/**/test/**, ./test/**, etc with no effect. I have also tried putting include/exclude in the "nyc" stanza of package.json.

If I specify --include='lib/**', I get no coverage at all, but --include='dist/test**' works, and shows me the mapped files, so include at least is being processed relative to the filesystem. Using -x 'dist/test**' --include='dist/test**' gives me no coverage at all. So it's pretty certain that --exclude is being processed relative to the filesystem as well, regardless of how I set --exclude-after-remap.

• Is my test-bundling approach incorrect?
• Is there a CLI option I've overlooked here?

Apologies if this is user error rather than a bug, but it seems that --exclude is not working as expected in this case.

[nrabinowitz]

Closing in favor of istanbuljs/nyc#1042