Add exercises with type-tests

common/.meta/test-runner.mjs

@@ -0,0 +1,54 @@
+import { execSync } from 'node:child_process'
+// Experimental: import config from './config.json' with { type: 'json' }
+
+import { readFileSync } from 'node:fs'
+import { exit } from 'node:process'
+
+/** @type {import('./config.json') } */
+const config = JSON.parse(
+  readFileSync(new URL('./config.json', import.meta.url))
+)
+
+const jest = !config.custom || config.custom['flag.tests.jest']
+const tstyche = config.custom?.['flag.tests.tstyche']
+
+console.log(
+  `[tests] tsc: ✅, tstyche: ${tstyche ? '✅' : '❌'}, jest: ${jest ? '✅' : '❌'}, `
+)
+
+console.log('[tests] tsc (compile)')
+
+try {
+  execSync('corepack yarn lint:types', {
+    stdio: 'inherit',
+    cwd: process.cwd(),
+  })
+} catch {
+  exit(-1)
+}
+
+if (tstyche) {
+  console.log('[tests] tstyche (type tests)')
+
+  try {
+    execSync('corepack yarn test:types', {
+      stdio: 'inherit',
+      cwd: process.cwd(),
+    })
+  } catch {
+    exit(-2)
+  }
+}
+
+if (jest) {
+  console.log('[tests] tstyche (implementation tests)')
+
+  try {
+    execSync('corepack yarn test:implementation', {
+      stdio: 'inherit',
+      cwd: process.cwd(),
+    })
+  } catch {
+    exit(-3)
+  }
+}

common/package.json

@@ -17,20 +17,23 @@
   },
   "devDependencies": {
     "@exercism/babel-preset-typescript": "^0.5.0",
-    "@exercism/eslint-config-typescript": "^0.7.0",
+    "@exercism/eslint-config-typescript": "^0.7.1",
     "@jest/globals": "^29.7.0",
-    "@types/node": "~22.0.0",
+    "@types/node": "~22.0.2",
     "babel-jest": "^29.7.0",
     "core-js": "~3.37.1",
     "eslint": "^9.8.0",
     "expect": "^29.7.0",
     "jest": "^29.7.0",
     "prettier": "^3.3.3",
+    "tstyche": "^2.1.1",
     "typescript": "~5.5.4",
-    "typescript-eslint": "^7.17.0"
+    "typescript-eslint": "^7.18.0"
   },
   "scripts": {
-    "test": "corepack yarn lint:types && jest --no-cache",
+    "test": "corepack yarn node .meta/test-runner.mjs",
+    "test:types": "corepack yarn tstyche",
+    "test:implementation": "corepack yarn jest --no-cache --passWithNoTests",
     "lint": "corepack yarn lint:types && corepack yarn lint:ci",
     "lint:types": "corepack yarn tsc --noEmit -p .",
     "lint:ci": "corepack yarn eslint . --ext .tsx,.ts"

common/tsconfig.json

@@ -27,6 +27,12 @@
     // https://babeljs.io/docs/en/babel-plugin-transform-typescript/#caveats
     "isolatedModules": true
   },
-  "include": ["*.ts", "*.tsx", ".meta/*.ts", ".meta/*.tsx"],
+  "include": [
+    "*.ts",
+    "*.tsx",
+    ".meta/*.ts",
+    ".meta/*.tsx",
+    "__typetests__/*.tst.ts"
+  ],
   "exclude": ["node_modules"]
 }