void testReadBytesWithNullBuffer() {
            // This is expected behavior for echo request - no reading needed
            assertDoesNotThrow(() -> {
                int result = echoRequest.readBytesWireFormat(null, 0);
                assertEquals(0, result);
            });
        }
    }

    @Nested
    @DisplayName("Integration Tests")
    class IntegrationTests {

        @Test

This way, its schema will show up in the API docs user interface:

<img src="/img/tutorial/dataclasses/image01.png">

## Dataclasses in Nested Data Structures { #dataclasses-in-nested-data-structures }

You can also combine `dataclasses` with other type annotations to make nested data structures.

            assertThrows(DcerpcException.class, () -> DcerpcHandle.getHandle("unsupported:\\\\server", mockContext));
        }
    }

    @Nested
    @DisplayName("Getter Tests")
    class GetterTests {

        @Test
        @DisplayName("Should return correct values from getters")
        void testGetters() throws CIFSException {

        }
    }

    public void test_execute_withNestedBoostQuery() {
        // Test executing BoostQuery with another BoostQuery inside (nested boost)
        Term term = new Term("field", "nested");
        TermQuery termQuery = new TermQuery(term);
        BoostQuery innerBoostQuery = new BoostQuery(termQuery, 2.0f);
        BoostQuery outerBoostQuery = new BoostQuery(innerBoostQuery, 3.0f);

It can't handle nested models very well. So, if the JSON body in the request is a JSON object that has inner fields that in turn are nested JSON objects, it cannot be properly documented and validated.

/// check | Inspired **FastAPI** to

* Full-Featured ORM
* Associations (Has One, Has Many, Belongs To, Many To Many, Polymorphism, Single-table inheritance)
* Hooks (Before/After Create/Save/Update/Delete/Find)
* Eager loading with `Preload`, `Joins`
* Transactions, Nested Transactions, Save Point, RollbackTo to Saved Point
* Context, Prepared Statement Mode, DryRun Mode
* Batch Insert, FindInBatches, Find To Map

        }
    }

    @Nested
    @DisplayName("Edge Case Tests")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle minimum valid buffer size")
        void testMinimumBufferSize() throws Exception {
            byte[] buffer = new byte[24]; // Exact size needed
            SMBUtil.writeInt2(24, buffer, 0);
            buffer[2] = 0x01;

                    .thenReturn(0); // auth_value length

            assertThrows(NdrException.class, () -> message.decode(mockBuffer));
        }
    }

    @Nested
    @DisplayName("Getter Tests")
    class GetterTests {

        @Test
        @DisplayName("getPtype should return correct packet type")
        void testGetPtype() {

        assertEquals(withCauseException.getCause(), withCauseException.getRootCause());

        // Test with nested causes
        RuntimeException middleCause = new RuntimeException("Middle", rootCause);
        TransportException nestedCauseException = new TransportException("Nested", middleCause);
        assertEquals(middleCause, nestedCauseException.getRootCause());

            assertTrue(result.contains("flags=15"));
            assertTrue(result.contains("referrals=["));
            assertFalse(result.contains("referrals=[]"));
        }
    }

    @Nested
    @DisplayName("Getter Methods Tests")
    class GetterTests {

        @BeforeEach
        void setupBuffer() {
            // Create buffer with 3 v1 referrals
            byte[] testBuffer = new byte[100];