test(utils): check username truncator boundary robustness (JhaSourav07#1563)

Author: udaycodespace

lib/svg/generator.test.ts

@@ -1264,4 +1264,24 @@ describe('Radar Scan Line Animation Alignment', () => {
     // 5. Assert: Ensure the original string was actually modified
     expect(result).not.toEqual(longUsername);
   });
+
+  it('renders long usernames as truncated SVG labels without breaking geometry', () => {
+    const longUsername = 'ThisIsAVeryLongUsernameThatExceedsThirtyCharacters';
+    const svg = generateSVG(
+      {
+        currentStreak: 10,
+        longestStreak: 20,
+        totalContributions: 200,
+        todayDate: '2024-06-12',
+      },
+      { user: longUsername, size: 'medium', autoTheme: false } as unknown as BadgeParams,
+      mockCalendar
+    );
+
+    expect(svg).toContain('...');
+    expect(svg).not.toContain(longUsername.toUpperCase());
+    expect(svg).toContain('text-anchor="middle"');
+    expect(svg).toContain('width="600"');
+    expect(svg).toContain('height="420"');
+  });
 });