social-app/apps/test/shared/utils/phone_display_formatter_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:social_app/shared/utils/phone_display_formatter.dart';

void main() {
  group('formatPhoneForDisplay', () {
    test('formats +86 numbers as local masked style', () {
      final formatted = formatPhoneForDisplay('+8613812345678');

      expect(formatted, '138****5678');
    });

    test('keeps international country code while masking middle part', () {
      final formatted = formatPhoneForDisplay('+14155552671');

      expect(formatted, '+1 ****2671');
    });

    test('normalizes separators before formatting', () {
      final formatted = formatPhoneForDisplay('(+86) 138-1234-5678');

      expect(formatted, '138****5678');
    });

    test('prefers longer country code in fallback detection', () {
      final formatted = formatPhoneForDisplay('+33612345678');

      expect(formatted, '+33 ****5678');
    });
  });
}