add unit tests

tests/helpers/renderHook.tsx

@@ -0,0 +1,36 @@
+import { act } from 'react';
+import { createRoot } from 'react-dom/client';
+
+export function renderHook<T>(useHook: () => T) {
+    let currentValue: T;
+
+    function TestComponent() {
+        currentValue = useHook();
+        return null;
+    }
+
+    const container = document.createElement('div');
+    const root = createRoot(container);
+
+    act(() => {
+        root.render(<TestComponent />);
+    });
+
+    return {
+        result: {
+            get current() {
+                return currentValue;
+            },
+        },
+        rerender() {
+            act(() => {
+                root.render(<TestComponent />);
+            });
+        },
+        unmount() {
+            act(() => {
+                root.unmount();
+            });
+        },
+    };
+}