Booking Engine

Architecture: Six focused services with the BookingService/SchedulingService overlap resolved by giving SchedulingService exactly one job, the transactional double-booking guard , while BookingService owns the create/reschedule/cancel workflow around it.

59 unit tests, 24 integration tests

package.json

@@ -13,7 +13,10 @@
     "prisma:generate": "prisma generate",
     "prisma:migrate": "prisma migrate dev",
     "prisma:studio": "prisma studio",
-    "prisma:seed": "tsx prisma/seed.ts"
+    "prisma:seed": "tsx prisma/seed.ts",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "test:integration": "vitest run --config vitest.integration.config.mts"
   },
   "repository": {
     "type": "git",
@@ -34,6 +37,7 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "lucide-react": "^1.28.0",
+    "luxon": "^3.7.2",
     "next": "^16.2.12",
     "next-auth": "^5.0.0-beta.32",
     "pg": "^8.22.0",
@@ -46,6 +50,7 @@
   "devDependencies": {
     "@tailwindcss/postcss": "^4.3.3",
     "@types/bcryptjs": "^2.4.6",
+    "@types/luxon": "^3.7.3",
     "@types/node": "^26.1.2",
     "@types/pg": "^8.20.3",
     "@types/react": "^19.2.18",
@@ -59,6 +64,7 @@
     "prisma": "^7.9.1",
     "tailwindcss": "^4.3.3",
     "tsx": "^4.23.4",
-    "typescript": "^6.0.3"
+    "typescript": "^6.0.3",
+    "vitest": "^4.1.10"
   }
 }