Show a confirmation toast when the Sentry test button is clicked

Co-authored-by: Junie <junie@jetbrains.com>

src/components/__tests__/SentryTestButton.test.tsx

@@ -1,5 +1,5 @@
-import { render, screen } from '@testing-library/react';
-import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { render, screen, fireEvent, act } from '@testing-library/react';
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
 import * as Sentry from '@sentry/react';
 import { SentryTestButton, handleSentryTestErrorClick } from '../SentryTestButton';
 
@@ -9,9 +9,30 @@ vi.mock('@sentry/react', () => ({
   metrics: { count: vi.fn() },
 }));
 
+/**
+ * De echte fout wordt bewust ongevangen via een `setTimeout` gegooid (zie
+ * SentryTestButton.tsx). Om dat in deze fake-timer-tests te simuleren zonder
+ * dat de test zelf crasht op die intentionele throw, wordt het "doortikken"
+ * van de timers hierin afgevangen.
+ */
+function advanceTimersIgnoringIntentionalThrow(ms: number) {
+  try {
+    act(() => {
+      vi.advanceTimersByTime(ms);
+    });
+  } catch {
+    // verwacht: de intentionele test-fout uit handleSentryTestErrorClick
+  }
+}
+
 describe('SentryTestButton', () => {
   beforeEach(() => {
     vi.clearAllMocks();
+    vi.useFakeTimers();
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
   });
 
   it('is visible in the current (development/test) build', () => {
@@ -27,4 +48,34 @@ describe('SentryTestButton', () => {
     });
     expect(Sentry.metrics.count).toHaveBeenCalledWith('test_counter', 1);
   });
+
+  it('shows a confirmation toast immediately when clicked, before the test error fires', () => {
+    render(<SentryTestButton />);
+    fireEvent.click(screen.getByRole('button', { name: 'Break the world' }));
+
+    expect(screen.getByRole('status')).toHaveTextContent('Test error verzonden naar Sentry');
+    // De log/metric/throw zijn pas gepland (setTimeout), nog niet uitgevoerd.
+    expect(Sentry.logger.info).not.toHaveBeenCalled();
+
+    advanceTimersIgnoringIntentionalThrow(0);
+
+    expect(Sentry.logger.info).toHaveBeenCalledWith('User triggered test error', {
+      action: 'test_error_button_click',
+    });
+    expect(Sentry.metrics.count).toHaveBeenCalledWith('test_counter', 1);
+  });
+
+  it('hides the toast again after it has been shown for a while', () => {
+    render(<SentryTestButton />);
+    fireEvent.click(screen.getByRole('button', { name: 'Break the world' }));
+    expect(screen.getByRole('status')).toBeInTheDocument();
+
+    // De intentionele fout (0ms-timer) stopt het "doortikken" van timers
+    // binnen dezelfde advanceTimersByTime-call, dus eerst die apart afhandelen
+    // voordat de resterende hide-timer (4000ms) doorgetikt kan worden.
+    advanceTimersIgnoringIntentionalThrow(0);
+    advanceTimersIgnoringIntentionalThrow(4000);
+
+    expect(screen.queryByRole('status')).not.toBeInTheDocument();
+  });
 });