tsconfig.test.json

// The TEST-layer type-check program (#20800 -- the last three packages of the
// #4311 ledger, graduated by the #15048 / #15050 road: a sibling program named
// by the `typecheck` script). `tsconfig.json` beside this one stays exactly as
// it is: it is the BUILD config. `package.json`'s `typecheck` script NAMES this
// sibling (`tsc --noEmit -p tsconfig.test.json`), because a config no script
// invokes reads as coverage and delivers none.
//
// WHAT THE BUILD CONFIG ALREADY DID. `tsconfig.json` includes `src` with no
// test exclusion, so the program that reads these tests always existed; the
// package simply declared no `typecheck` script, so nothing ever ran it. That
// is the `service-automation` / `service-cluster` shape, not the
// exclude-and-compensate one, and AGENTS.md forbids ADDING such an exclusion.
//
// What differs from the build config, and what deliberately does NOT:
//   - MODULE SEMANTICS and `lib`, nothing else. vitest runs these files as ESM
//     through esbuild on a Node that has the ES2022 builtins, and the root
//     config's `lib` is ES2020. `module: esnext` / `moduleResolution: bundler`
//     is the reading vitest really performs; the build leg of the script
//     (`tsc --noEmit`) keeps the stricter NodeNext reading of the same files,
//     so the two programs complement each other rather than overlap.
//   - STRICTNESS IS UNTOUCHED. `strict`, `noUnusedLocals`, `noUnusedParameters`,
//     `noImplicitReturns`, `noFallthroughCasesInSwitch`, `rootDir`, `paths` and
//     `types` are all INHERITED and none is re-declared. ⚠️ A child that declared
//     its own `paths` would REPLACE the parent map, so this file declares none.
//     Nothing here may loosen a type rule; if a test does not compile, that is
//     the finding.
//
// MEASURED at f8178ffece (origin/main), the workspace closure built first
// (`turbo run build --filter='@objectstack/cloud-connection^...'`), BEFORE any
// fix, once per config (`tsc --noEmit --pretty false [--listFiles] -p <config>`):
//
//   program under this config     923 files (44 of them this package's `src`),
//                                 all 30 of its `src/**/*.test.ts` in it
//   BUILD config (tsconfig.json)  13  = TS2493 x11 + TS2550 x2
//   THIS config                   11  = TS2493 x11
//
// The two readings DISAGREE by exactly two, and those two are the config tier:
// TS2550 ("Property 'at' does not exist ... change your target library"), both
// `Array#at` in `marketplace-install-local-bundle.test.ts` (81, 106) -- the CHECK
// reading ES2020 where the runtime is Node >= 22, which is what `lib` below
// reconciles. The other 11 are code tier and agree under both configs: TS2493
// ("Tuple type '[]' of length '0' has no element at index N"), every one an
// index into `fetchSpy.mock.calls[0]` where `fetchSpy = vi.fn(async () => ...)`
// was declared with NO parameters, so vitest types `.mock.calls` as an array of
// EMPTY tuples. The call site it stubs is `fetch(url, init)`, which the plugin
// always calls with a string URL and an init object; the fix types each of the 7
// declarations (`cloud-connection-plugin.test.ts` x3,
// `connection-credential-store.test.ts` x4) to that call --
// `vi.fn(async (_url: string, _init?: RequestInit) => ...)`. No cast was added,
// no `@ts-expect-error`, no `src` signature touched.
//
// The build leg reads these tests under ES2020 too, so the two `Array#at` reads
// were not left to this file's `lib`: they now use vitest's own
// `mock.lastCall` (the LAST register call, which is what both comments say),
// which compiles under both programs. Without that the first leg of `typecheck`
// would stay red on files this leg accepts.
//
// AFTER: 0 and 0. There is NO `test-typecheck-debt.json` beside this config, and
// its ABSENCE is the zero: any error in any file here is red immediately, with no
// ledger to be added to -- the same call `metadata-fs` and
// `trigger-record-change` recorded.
{
  "extends": ["./tsconfig.json", "../../tsconfig.test.base.json"],
  "include": ["src/**/*"],
  "exclude": ["node_modules", "dist"]
}