test: add toggleFileTree test code

Author: in-ch

babel.config.js

@@ -0,0 +1,8 @@
+{
+  "presets": [
+    "@babel/preset-typescript",
+    "@babel/preset-env",
+    "@babel/preset-react"
+  ],
+  "plugins": ["@babel/plugin-transform-runtime"]
+}

babel.config.json

@@ -57,6 +57,7 @@
     "eslint-plugin-react": "^7.33.2",
     "eslint-plugin-react-hooks": "^4.6.0",
     "jest": "^29.3.1",
+    "jest-environment-jsdom": "^29.7.0",
     "jest-in-case": "^1.0.2",
     "next": "^14.1.0",
     "prettier": "^2.2.1",