// The hex should be "010203FF"
            assertTrue(result.contains("010203FF"));
        }

        @Test
        @DisplayName("toString with empty challenge array")
        void testToStringWithEmptyChallenge() {
            UniAddress dc = mock(UniAddress.class);
            when(dc.toString()).thenReturn("EMPTYSERVER");

            NtlmChallenge nc = new NtlmChallenge(new byte[0], dc);