assertEquals(0, buffer[1], "Second byte must be null terminator for empty string");
    }

    @Test
    @DisplayName("readBytesWireFormat is a no‑op and returns zero")
    void testReadBytesWireFormatNoop() {
        byte[] buffer = new byte[10];
        int used = cmd.readBytesWireFormat(buffer, 0);
        assertEquals(0, used, "readBytesWireFormat is unimplemented and must return 0");
    }