assertThrows(CIFSException.class, () -> ctx.initSecContext(buf, 2, 2));
        }

        @Test
        @DisplayName("initSecContext null token edge cases")
        void testInitSecContextNullToken() throws Exception {
            DummySSPContext ctx = new DummySSPContext(new byte[] { 1 }, false, null, null, 0, false);
            // len == 0 is allowed and returns empty token