test: remove toMatchSnapshot and removed snapshot files in notifications tests (#29329)

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## **Description**

> Removes Jest snapshot coverage for several notification detail
components and deletes the associated `.snap` files.
> 
> Updates `NotificationBadge`, `NetworkFeeField`, and `Header` tests to
assert specific rendered output instead of `toMatchSnapshot()` (e.g.,
presence of key `testID`s and title/description text, and explicitly
expecting `null` renders where applicable).

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## **Related issues**

Fixes:

## **Manual testing steps**

```gherkin
Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]
```

## **Screenshots/Recordings**

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- [ ] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [ ] I've completed the PR template to the best of my ability
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Not required for external contributors.

#### Performance checks (if applicable)

- [ ] I've tested on Android
  - Ideally on a mid-range device; emulator is acceptable
- [ ] I've tested with a power user scenario
- Use these [power-user
SRPs](https://consensyssoftware.atlassian.net/wiki/spaces/TL1/pages/edit-v2/401401446401?draftShareId=9d77e1e1-4bdc-4be1-9ebb-ccd916988d93)
to import wallets with many accounts and tokens
- [ ] I've instrumented key operations with Sentry traces for production
performance metrics
- See [`trace()`](/app/util/trace.ts) for usage and
[`addToken`](/app/components/Views/AddAsset/components/AddCustomToken/AddCustomToken.tsx#L274)
for an example

For performance guidelines and tooling, see the [Performance
Guide](https://consensyssoftware.atlassian.net/wiki/spaces/TL1/pages/400085549067/Performance+Guide+for+Engineers).

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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Test-only changes that remove snapshot reliance; low product risk but
may reduce coverage of UI regressions previously caught by snapshots.
> 
> **Overview**
> Removes Jest snapshot files for several notification components and
updates their tests to stop using `toMatchSnapshot()`.
> 
> Tests now assert specific rendered output instead (e.g., presence of
key `testID`s/text) and explicitly check `null` rendering for
`NetworkFeeField` where applicable.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
dbddff4. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: cortisiko

app/components/UI/Notification/BaseNotification/__snapshots__/index.test.jsx.snap

@@ -45,10 +45,10 @@ const defaultProps = [
 describe('BaseNotification', () => {
   it('gets icon correctly for each status', () => {
     defaultProps.forEach(({ status, data }) => {
-      const { toJSON } = renderWithProvider(
+      const { getByTestId } = renderWithProvider(
         <BaseNotification status={status} data={data} />,
       );
-      expect(toJSON()).toMatchSnapshot();
+      expect(getByTestId('notification-title')).toBeOnTheScreen();
     });
   });
 

app/components/UI/Notification/BaseNotification/index.test.jsx

@@ -4,7 +4,7 @@ import renderWithProvider from '../../../../util/test/renderWithProvider';
 
 describe('Empty', () => {
   it('should render correctly', () => {
-    const { toJSON } = renderWithProvider(<Empty />);
-    expect(toJSON()).toMatchSnapshot();
+    const { getByText } = renderWithProvider(<Empty />);
+    expect(getByText('Nothing to see here')).toBeOnTheScreen();
   });
 });

app/components/UI/Notification/Empty/__snapshots__/index.test.tsx.snap

@@ -32,18 +32,6 @@ describe('NotificationBadge', () => {
       'https://token.api.cx.metamask.io/assets/nativeCurrencyLogos/ethereum.svg',
   };
 
-  it('should renders correctly', () => {
-    const { toJSON } = render(
-      <Provider store={store}>
-        <NotificationBadge
-          {...commonProps}
-          notificationType={TRIGGER_TYPES.ETH_RECEIVED}
-        />
-      </Provider>,
-    );
-    expect(toJSON()).toMatchSnapshot();
-  });
-
   it('should renders NetworkMainAssetLogo for ETH notification types', () => {
     const { getByTestId } = render(
       <Provider store={store}>

app/components/UI/Notification/Empty/index.test.tsx

@@ -67,7 +67,7 @@ describe('NetworkFeeField', () => {
       />,
     );
 
-    expect(toJSON()).toMatchSnapshot();
+    expect(toJSON()).toBeNull();
   });
 
   it('renders loading state', () => {

app/components/Views/Notifications/Details/Badge/__snapshots__/index.test.tsx.snap

@@ -9,10 +9,14 @@ jest.mock('../../../../../component-library/components/Texts/Text', () => {
   const originalModule = jest.requireActual(
     '../../../../../component-library/components/Texts/Text',
   );
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
+  const { Text } = require('react-native');
   return {
     ...originalModule,
     __esModule: true,
-    default: jest.fn(({ children }) => children),
+    default: jest.fn(({ children, testID }) => (
+      <Text testID={testID}>{children}</Text>
+    )),
   };
 });
 
@@ -21,7 +25,10 @@ describe('Header', () => {
   const DESCRIPTION = 'This is a mock of description';
 
   it('should render correctly', () => {
-    const { toJSON } = render(<Header title={TITLE} subtitle={DESCRIPTION} />);
-    expect(toJSON()).toMatchSnapshot();
+    const { getByTestId, getByText } = render(
+      <Header title={TITLE} subtitle={DESCRIPTION} />,
+    );
+    expect(getByTestId('notification-details-header-title')).toBeOnTheScreen();
+    expect(getByText(DESCRIPTION)).toBeOnTheScreen();
   });
 });