Enable TypeScript tests using Node's native type stripping #1429
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Add @tsconfig/node-ts to support running .ts test files directly with Node 24's built-in type stripping. Migrate resultCoordinates test as proof of concept. - Add @tsconfig/node-ts dependency - Extend tsconfig.json with node-ts config - Update mocha script to include .ts files - Convert test/lib/resultCoordinates.js to TypeScript
- Add test/**/*.ts to tsconfig include array so tests are type-checked - Disable verbatimModuleSyntax to allow ESM imports in .ts files - Update ResultCoordinates constructor to accept null for namespace - Restore original null value in test to preserve test coverage
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Summary
This PR enables writing tests in TypeScript by using Node 24's native type stripping. No build step or loader required.
Changes
@tsconfig/node-tsdependencytsconfig.jsonwith the node-ts config.jsand.tstest filestest/lib/resultCoordinates.jsto TypeScript as a proof of conceptHow it works
Node 24 strips TypeScript types at runtime, so
.tsfiles run directly without transpilation. Mocha picks up both JS and TS files, allowing incremental migration.Testing
The migrated test passes alongside existing JS tests.