assertTrue(ex.getMessage().contains("Invalid SID sub_authority_count"));
        }

        @Test
        @DisplayName("Relative constructor with RID appends last subauthority")
        void testRelativeConstructorWithRid() throws Exception {
            // Arrange
            SID dom = new SID("S-1-5-21-1-2-3");

            // Act
            SID sid = new SID(dom, 1029);

            // Assert