feat: add tests for normalizeName and RecipesService methods, including unit conversion and alias normalization

backend/package.json

@@ -8,7 +8,9 @@
     "start:dev": "nest start --watch",
     "prisma:generate": "prisma generate",
     "prisma:migrate": "prisma migrate dev",
-    "prisma:deploy": "prisma migrate deploy"
+    "prisma:deploy": "prisma migrate deploy",
+    "test": "jest",
+    "test:watch": "jest --watch"
   },
   "dependencies": {
     "@nestjs/common": "^10.3.0",
@@ -35,6 +37,15 @@
     "@types/pdf-parse": "^1.1.5",
     "@types/uuid": "^10.0.0",
     "prisma": "6.12.0",
-    "typescript": "^5.4.5"
+    "typescript": "^5.4.5",
+    "jest": "^29.7.0",
+    "ts-jest": "^29.2.6",
+    "@types/jest": "^29.5.14"
+  },
+  "jest": {
+    "preset": "ts-jest",
+    "testEnvironment": "node",
+    "rootDir": "src",
+    "testRegex": ".*\\.spec\\.ts$",
+    "moduleFileExtensions": ["js", "json", "ts"]
   }
-}