testy jednostkowe

package.json

@@ -6,7 +6,8 @@
     "start": "expo start",
     "android": "expo start --android",
     "ios": "expo start --ios",
-    "web": "expo start --web"
+    "web": "expo start --web",
+    "test": "jest"
   },
   "dependencies": {
     "@expo/metro-runtime": "~5.0.4",
@@ -26,8 +27,14 @@
     "zustand": "^5.0.3"
   },
   "devDependencies": {
-    "@babel/core": "^7.20.0",
+    "@babel/core": "^7.27.1",
+    "@babel/preset-env": "^7.27.2",
+    "@babel/preset-flow": "^7.27.1",
+    "@babel/preset-react": "^7.27.1",
+    "@babel/preset-typescript": "^7.27.1",
     "@types/react": "~19.0.10",
+    "babel-jest": "^29.7.0",
+    "jest": "^29.7.0",
     "typescript": "^5.3.3"
   },
   "private": true