assertEquals(42, resp.wordCount);
    }

    @Test
    @DisplayName("toString includes andxCommand and andxOffset")
    void testToStringContainsFields() {
        DummyPlainSMB next = new DummyPlainSMB();
        DummyAndXBlock block = new DummyAndXBlock(next);

        byte[] buf = new byte[128];
        block.writeAndXWireFormat(buf, 0);