text: import isDicomUid from './isDicomUid';
  
  describe('isDicomUid', function() {
    it('should return true for valid DICOM UIDs', function() {
      expect(isDicomUid('1')).toBe(true);
      expect(isDicomUid('1.2')).toBe(true);
      expect(isDicomUid('1.2.3')).toBe(true);
      expect(isDicomUid('1.2.3.4')).toBe(true);
    });
    it('should return false for invalid DICOM UIDs', function() {
      expect(isDicomUid('x')).toBe(false);
      expect(isDicomUid('1.')).toBe(false);
      expect(isDicomUid('1. 2')).toBe(false);
      expect(isDicomUid('1.2.n.4')).toBe(false);
    });
  });
  