AI Implementation feature(883): Admin Area General Settings and Categories 1.01 (#23)

tests/frontend/admin-general-pure.spec.ts

@@ -1,4 +1,11 @@
-import { deriveEventState, endAfterStartValidator, toDatetimeLocal, toIsoUtc } from '../../frontend/src/app/features/admin/general.pure';
+import {
+  deriveEventState,
+  endAfterStartValidator,
+  normalizePageTitle,
+  pageTitleError,
+  toDatetimeLocal,
+  toIsoUtc,
+} from '../../frontend/src/app/features/admin/general.pure';
 
 describe('deriveEventState', () => {
   const start = '2026-01-01T00:00:00Z';
@@ -80,3 +87,42 @@ describe('datetime helpers', () => {
     expect(toIsoUtc('')).toBe('');
   });
 });
+
+describe('pageTitleError', () => {
+  it('returns "required" for empty input', () => {
+    expect(pageTitleError('')).toBe('required');
+    expect(pageTitleError(null)).toBe('required');
+    expect(pageTitleError(undefined)).toBe('required');
+  });
+
+  it('returns "required" for whitespace-only input', () => {
+    expect(pageTitleError('   ')).toBe('required');
+    expect(pageTitleError('\t\n ')).toBe('required');
+  });
+
+  it('returns null for a valid title', () => {
+    expect(pageTitleError('OpenVelo')).toBeNull();
+  });
+
+  it('returns "maxlength" when the raw string exceeds 120 characters', () => {
+    expect(pageTitleError('a'.repeat(121))).toBe('maxlength');
+  });
+
+  it('returns null when surrounding whitespace keeps the trimmed length within bounds', () => {
+    expect(pageTitleError('  OpenVelo  ')).toBeNull();
+  });
+});
+
+describe('normalizePageTitle', () => {
+  it('returns an empty string for empty input', () => {
+    expect(normalizePageTitle('')).toBe('');
+  });
+
+  it('returns an empty string for whitespace-only input', () => {
+    expect(normalizePageTitle('   ')).toBe('');
+  });
+
+  it('trims surrounding whitespace from a valid title', () => {
+    expect(normalizePageTitle('  OpenVelo  ')).toBe('OpenVelo');
+  });
+});