From f139ee9e45eab134c478c8960f0b6453e35868bb Mon Sep 17 00:00:00 2001 From: Justin Stayton Date: Thu, 27 Aug 2026 09:53:52 -0400 Subject: [PATCH 1/2] Type-check `main.d.ts` in CI MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit `main.d.ts` is the published `types` entry, but nothing verified it. `npm test` only runs `node --test` over the JS, so the declarations could drift from `main.js` without anything failing. `src/main.test-d.ts` exercises the declared API at compile time and never runs — `tsc` failing to compile it is the failure. The `@ts-expect-error` directives are load-bearing in both directions, since a declaration that gets looser stops erroring and then fails on the unused directive. Verified by mutating `main.d.ts` six ways: widening the return type to `boolean`, making `body` optional, retyping `leewayMinutes`, adding an index signature, widening the error `name`, and dropping the error class from the namespace. All six fail the check. The type test is excluded from the published package. Co-Authored-By: Claude Opus 5 --- .github/workflows/ci.yml | 2 + package-lock.json | 546 ++++++++++++++++++++++++++++++++++++++- package.json | 9 +- src/main.test-d.ts | 36 +++ tsconfig.json | 14 + 5 files changed, 603 insertions(+), 4 deletions(-) create mode 100644 src/main.test-d.ts create mode 100644 tsconfig.json diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 4b94830..82bb918 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -25,5 +25,7 @@ jobs: run: npm install - name: Run lint run: npm run lint + - name: Run typecheck + run: npm run typecheck - name: Run tests run: npm test diff --git a/package-lock.json b/package-lock.json index d74e227..463c8b8 100644 --- a/package-lock.json +++ b/package-lock.json @@ -16,7 +16,8 @@ "globals": "^17.11.0", "jsdoc": "^4.0.5", "prettier": "3.9.6", - "release-it": "^21.0.2" + "release-it": "^21.0.2", + "typescript": "^7.0.2" }, "engines": { "node": ">=22" @@ -809,6 +810,346 @@ "dev": true, "license": 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"!src/**/*.test.js" + "!src/**/*.test.js", + "!src/**/*.test-d.ts" ], "scripts": { "docs": "jsdoc src --recurse --destination docs", @@ -23,7 +24,8 @@ "lint:quality": "eslint .", "lint:quality:fix": "eslint --fix .", "release": "release-it --only-version", - "test": "node --test" + "test": "node --test", + "typecheck": "tsc" }, "devDependencies": { "@eslint/js": "^10.0.1", @@ -33,7 +35,8 @@ "globals": "^17.11.0", "jsdoc": "^4.0.5", "prettier": "3.9.6", - "release-it": "^21.0.2" + "release-it": "^21.0.2", + "typescript": "^7.0.2" }, "engines": { "node": ">=22" diff --git a/src/main.test-d.ts b/src/main.test-d.ts new file mode 100644 index 0000000..486014c --- /dev/null +++ b/src/main.test-d.ts @@ -0,0 +1,36 @@ +// Compile-time tests for `main.d.ts`. These never run — `tsc` failing to +// compile this file IS the failure. They exist so the declarations can't drift +// from `main.js` unnoticed. +import verifyTruepicWebhook = require('./main') + +function expectType(_value: T): void {} + +const url = 'http://localhost:3001/webhook' +const secret = 'secret' +const header = 't=1698259719,s=S9lwmAyba6aYa/Ts2jlJ6venPhSvlGjd0QdNsvi8iq8=' +const body = '{"type":"captures.created"}' + +// Resolves to exactly `true`, not a widened `boolean`. +expectType(verifyTruepicWebhook({ url, secret, header, body })) + +expectType( + verifyTruepicWebhook({ url, secret, header, body, leewayMinutes: 5 }), +) + +// @ts-expect-error `body` is required. +verifyTruepicWebhook({ url, secret, header }) + +// @ts-expect-error `leewayMinutes` is a number. +verifyTruepicWebhook({ url, secret, header, body, leewayMinutes: '5' }) + +// @ts-expect-error Unknown options are rejected. +verifyTruepicWebhook({ url, secret, header, body, nope: true }) + +try { + verifyTruepicWebhook({ url, secret, header, body }) +} catch (cause) { + if (cause instanceof verifyTruepicWebhook.TruepicWebhookVerifierError) { + expectType<'TruepicWebhookVerifierError'>(cause.name) + expectType(cause.message) + } +} diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..54114cc --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,14 @@ +{ + "compilerOptions": { + "module": "node16", + "moduleResolution": "node16", + "target": "es2024", + "strict": true, + "noUncheckedIndexedAccess": true, + "noUnusedLocals": true, + "noUnusedParameters": true, + "noEmit": true, + "types": [] + }, + "include": ["src/**/*.ts"] +} From 439a92f534521764705f85712378acace0ae9e72 Mon Sep 17 00:00:00 2001 From: Justin Stayton Date: Thu, 27 Aug 2026 10:01:39 -0400 Subject: [PATCH 2/2] Cover every option in the type tests MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Only `body`'s requiredness and `leewayMinutes`'s type were negatively tested, so `url`, `secret`, and `header` could turn optional — and all four required options could widen to `unknown` or `any` — with zero diagnostics. Each option now gets its own omission case and its own wrong-type case, one directive per property, so a single option drifting can't hide behind another. The wrong-type cases are what catch a widening: the call stops erroring and `tsc` fails on the unused directive. Co-Authored-By: Claude Opus 5 --- src/main.test-d.ts | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/src/main.test-d.ts b/src/main.test-d.ts index 486014c..d5044ec 100644 --- a/src/main.test-d.ts +++ b/src/main.test-d.ts @@ -14,12 +14,39 @@ const body = '{"type":"captures.created"}' expectType(verifyTruepicWebhook({ url, secret, header, body })) expectType( - verifyTruepicWebhook({ url, secret, header, body, leewayMinutes: 5 }), + verifyTruepicWebhook({ url, secret, header, body, leewayMinutes: 10 }), ) +// Every option but `leewayMinutes` is required. Each omission is tested +// separately so that any one of them turning optional fails the check. + +// @ts-expect-error `url` is required. +verifyTruepicWebhook({ secret, header, body }) + +// @ts-expect-error `secret` is required. +verifyTruepicWebhook({ url, header, body }) + +// @ts-expect-error `header` is required. +verifyTruepicWebhook({ url, secret, body }) + // @ts-expect-error `body` is required. verifyTruepicWebhook({ url, secret, header }) +// Every option is narrowly typed. These also catch a widening to `unknown` or +// `any`, which would otherwise swallow the wrong type silently. + +// @ts-expect-error `url` is a string. +verifyTruepicWebhook({ url: 1, secret, header, body }) + +// @ts-expect-error `secret` is a string. +verifyTruepicWebhook({ url, secret: 1, header, body }) + +// @ts-expect-error `header` is a string. +verifyTruepicWebhook({ url, secret, header: 1, body }) + +// @ts-expect-error `body` is a string. +verifyTruepicWebhook({ url, secret, header, body: 1 }) + // @ts-expect-error `leewayMinutes` is a number. verifyTruepicWebhook({ url, secret, header, body, leewayMinutes: '5' })