test(svg): verify truncateUsername caps long usernames in generateSVG

Author: ShafinNigamana

lib/svg/generator.test.ts

@@ -1479,6 +1479,41 @@ describe('Radar Scan Line Animation Alignment', () => {
     expect(geometryLong).toEqual(geometryBaseline);
   });
 
+  it('truncates usernames longer than 12 characters and adds an ellipsis in generateSVG', () => {
+    const longUsername = 'averylongusernamethatexceeds20chars'; // 36 characters
+    const expectedTruncated = 'AVERYLONGUSE...'; // 12 characters + '...' (in uppercase)
+
+    const svg = generateSVG(
+      mockStats,
+      { user: longUsername, size: 'medium', autoTheme: false } as unknown as BadgeParams,
+      mockCalendar
+    );
+
+    const titleMatch = svg.match(/<text[^>]*class="title"[^>]*>([^<]*)<\/text>/);
+    expect(titleMatch).not.toBeNull();
+    const renderedTitle = titleMatch?.[1];
+
+    expect(renderedTitle).toBe(expectedTruncated);
+    expect(renderedTitle).not.toContain(longUsername.toUpperCase());
+  });
+
+  it('does not truncate short usernames and leaves them without ellipsis in generateSVG', () => {
+    const shortUsername = 'abc'; // 3 characters
+
+    const svg = generateSVG(
+      mockStats,
+      { user: shortUsername, size: 'medium', autoTheme: false } as unknown as BadgeParams,
+      mockCalendar
+    );
+
+    const titleMatch = svg.match(/<text[^>]*class="title"[^>]*>([^<]*)<\/text>/);
+    expect(titleMatch).not.toBeNull();
+    const renderedTitle = titleMatch?.[1];
+
+    expect(renderedTitle).toBe(shortUsername.toUpperCase());
+    expect(renderedTitle).not.toContain('...');
+  });
+
   describe('glow parameter', () => {
     const mockStats: StreakStats = {
       currentStreak: 5,