assertTrue(writtenPath.contains("abc"), "Path should be written to buffer");
    }

    @Test
    @DisplayName("writeParametersWireFormat throws on null path")
    void testNullPath() {
        Trans2GetDfsReferral cmd = new Trans2GetDfsReferral(null);
        byte[] buffer = new byte[10];
        assertThrows(NullPointerException.class, () -> cmd.writeParametersWireFormat(buffer, 0));
    }