use jest.fn on mocked hooks (#449)

Author: LucasGarcez

README.md

@@ -302,6 +302,29 @@ export function TestSafeAreaProvider({ children }) {
 }
 ```
 
+#### Enabling Babel Parsing for Modules
+
+While trying to use this mock, a frequently encountered error is:
+
+```js
+SyntaxError: Cannot use import statement outside a module.
+```
+
+This issue arises due to the use of the import statement. To resolve it, you need to permit Babel to parse the file.
+
+By default, [Jest does not parse files located within the node_modules folder](<(https://jestjs.io/docs/configuration#transformignorepatterns-arraystring)>).
+
+However, you can modify this behavior as outlined in the Jest documentation on [`transformIgnorePatterns` customization](https://jestjs.io/docs/tutorial-react-native#transformignorepatterns-customization).
+If you're using a preset, like the one from [react-native](https://github.com/facebook/react-native/blob/main/packages/react-native/jest-preset.js), you should update your Jest configuration to include `react-native-safe-area-context` as shown below:
+
+```js
+transformIgnorePatterns: [
+  'node_modules/(?!((jest-)?react-native|@react-native(-community)?|react-native-safe-area-context)/)',
+];
+```
+
+This adjustment ensures Babel correctly parses modules, avoiding the aforementioned syntax error.
+
 ## Contributing
 
 See the [Contributing Guide](CONTRIBUTING.md)

jest/mock.tsx

@@ -30,18 +30,18 @@ const RNSafeAreaContext = jest.requireActual<{
 export default {
   ...RNSafeAreaContext,
   initialWindowMetrics: MOCK_INITIAL_METRICS,
-  useSafeAreaInsets: () => {
+  useSafeAreaInsets: jest.fn(() => {
     return (
       useContext(RNSafeAreaContext.SafeAreaInsetsContext) ??
       MOCK_INITIAL_METRICS.insets
     );
-  },
-  useSafeAreaFrame: () => {
+  }),
+  useSafeAreaFrame: jest.fn(() => {
     return (
       useContext(RNSafeAreaContext.SafeAreaFrameContext) ??
       MOCK_INITIAL_METRICS.frame
     );
-  },
+  }),
   // Provide a simpler implementation with default values.
   SafeAreaProvider: ({ children, initialMetrics }: SafeAreaProviderProps) => {
     return (