tsconfig.test.json

{
  // Typechecking for the ~404k lines of TEST code that `tsconfig.json`
  // excludes and nothing else covers. `pnpm typecheck` builds production
  // source only; vitest transpiles without checking types; ESLint here is not
  // type-aware. So a test file could assert against a shape that does not
  // exist and stay green forever — `sourceCjkActions.test.ts` mocked
  // `CJKFormattingSettings` with three keys the interface has never had.
  //
  // `pnpm lint:test-types` runs this and compares against a per-file baseline
  // that ratchets DOWN only, so NEW test code is checked from day one while
  // the pre-existing debt burns off. See scripts/check-test-types.mjs.
  "extends": "./tsconfig.json",
  "compilerOptions": {
    // Test files legitimately reach for node APIs (fs, path, process) and for
    // the matchers vitest and jest-dom install.
    "types": ["node", "vitest/globals", "@testing-library/jest-dom"],

    // Deliberately relaxed relative to production. An unused local in a test
    // is usually a fixture kept for readability, not a defect, and flagging it
    // would bury the errors that matter under noise the linter already owns.
    "noUnusedLocals": false,
    "noUnusedParameters": false,

    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig-test/.tsbuildinfo"
  },
  "include": ["src"],
  "exclude": []
}