hook test

hooks/useLocalStorage.test.js

@@ -0,0 +1,33 @@
+import { renderHook, act } from "@testing-library/react";
+import { useLocalStorage } from "./useLocalStorage";
+
+describe("useLocalStorage", () => {
+    beforeEach(() => {
+        localStorage.clear();
+    });
+
+    it("should initialize with fallback value if no stored value exists", () => {
+        const { result } = renderHook(() => useLocalStorage("testKey", "fallback"));
+
+        expect(result.current[0]).toBe("fallback");
+    });
+
+    it("should initialize with stored value if it exists", () => {
+        localStorage.setItem("testKey", JSON.stringify("storedValue"));
+
+        const { result } = renderHook(() => useLocalStorage("testKey", "fallback"));
+
+        expect(result.current[0]).toBe("storedValue");
+    });
+
+    it("should update stored value when setValue is called", () => {
+        const { result } = renderHook(() => useLocalStorage("testKey", "fallback"));
+
+        act(() => {
+            result.current[1]("newValue");
+        });
+
+        expect(result.current[0]).toBe("newValue");
+        expect(JSON.parse(localStorage.getItem("testKey"))).toBe("newValue");
+    });
+});