NdrShort ndrShort = new NdrShort(inputValue);

            // Then: Value should be masked with 0xFF (lower 8 bits)
            assertEquals(inputValue & 0xFF, ndrShort.value, "Constructor should mask value with 0xFF");
        }

        @Test
        @DisplayName("Should handle zero value correctly")
        void testConstructorZero() {
            // Given/When: Creating NdrShort with zero

        assertTrue(decoded > 0, "Decode should return positive length");

        assertEquals(NtStatus.NT_STATUS_MORE_PROCESSING_REQUIRED, resp.getStatus());
        assertArrayEquals(blob, resp.getBlob(), "Security blob should match");
        assertEquals(sessionFlags, resp.getSessionFlags(), "Session flags should decode");
        assertTrue(resp.isLoggedInAsGuest(), "Guest/anonymous should be detected");

    void testDcerpcFaultInvalidTag() {
        assertEquals(0x1C000006, DcerpcError.DCERPC_FAULT_INVALID_TAG);
    }

    @Test
    @DisplayName("Should verify DCERPC_FAULT_CONTEXT_MISMATCH constant value")
    void testDcerpcFaultContextMismatch() {
        assertEquals(0x1C00001A, DcerpcError.DCERPC_FAULT_CONTEXT_MISMATCH);
    }

    @Test

        NdrShort ns = new NdrShort(original);
        buf.reset();
        ns.encode(buf); // should not throw

        // After encoding, check how many bytes were used
        int bytesUsed = buf.getIndex();
        // Should be 2 bytes for the short value (alignment may add padding)
        assertTrue(bytesUsed >= 2, "Should use at least 2 bytes for short");

        // Reset index to read back
        buf.reset();

        assertTrue(config.isUseRDMA(), "RDMA should be enabled");
        assertEquals("disni", config.getRdmaProvider(), "Provider should be disni");
        assertEquals(16384, config.getRdmaReadWriteThreshold(), "Threshold should be 16KB");
        assertEquals(131072, config.getRdmaMaxSendSize(), "Max send size should be 128KB");
        assertEquals(131072, config.getRdmaMaxReceiveSize(), "Max receive size should be 128KB");

        // Then - Buffer should have expected size
        assertNotNull(buffer, "Buffer should not be null");
        assertEquals(SmbComTransaction.TRANSACTION_BUF_SIZE, buffer.length, "Buffer should have TRANSACTION_BUF_SIZE");

        // The validation in getBuffer() ensures size is within bounds (0 < size <= 1MB)
        assertTrue(buffer.length > 0, "Buffer size should be positive");

            assertNotNull(bindWithParams, "Constructor should create instance");
            assertEquals(0, bindWithParams.getOpnum(), "Opnum should be 0");
            assertEquals(11, bindWithParams.getPtype(), "Ptype should be 11 for bind message");
            assertEquals(DcerpcConstants.DCERPC_FIRST_FRAG | DcerpcConstants.DCERPC_LAST_FRAG, bindWithParams.getFlags(),
                    "Flags should be set for first and last fragment");

        // Verify the AvPair type is MsvAvTargetName
        assertEquals(AvPair.MsvAvTargetName, avTargetName.getType(), "AvPair type should be MsvAvTargetName");
        // Verify the raw bytes are correctly stored
        assertArrayEquals(rawBytes, avTargetName.getRaw(), "Raw bytes should match the input");
    }

    /**
     * Test constructor with a target name string.

		t.Errorf(fmt.Sprintf("Count should work, but got err %v", err))
	}
	if count1 != 1 {
		t.Errorf("Count with group should be 1, but got count: %v", count1)
	}

	var count2 int64
	if err := DB.Model(&Company{}).Where("name in ?", []string{"company_count_group_b", "company_count_group_c"}).Group("name").Count(&count2).Error; err != nil {
		t.Errorf(fmt.Sprintf("Count should work, but got err %v", err))
	}
	if count2 != 2 {

In this case, you could want to document how that external API *should* look like. What *path operation* it should have, what body it should expect, what response it should return, etc.

## An app with callbacks { #an-app-with-callbacks }

Let's see all this with an example.

Imagine you develop an app that allows creating invoices.