Oxlint JS plugins conformance tests

Conformance tests run:

• All ESLint's tests for its built-in rules as Oxlint JS plugins.
• Tests from various ESLint plugins, running in Oxlint.

They do this by substituting ESLint's RuleTester for Oxlint's version, and then require()ing the test files to run the tests.

The results are saved in snapshots directory.

Setup

Build Oxlint in conformance mode:

cd apps/oxlint
pnpm install
pnpm run build-conformance

Initialize plugin submodules:

pnpm run init-conformance

Run conformance tests

pnpm run conformance

Adding a plugin to conformance tests

• Add code to init.sh to clone the plugin's repo.
• Add a file to src/groups directory (copy pattern used for other plugins).
• Add the group to src/groups/index.ts.

Debugging

While working on adding a new plugin, you may find it useful to filter the test run, by editing conformance/src/filter.ts. You can filter by plugin name, rule, or the code of a specific test case.