*/
  @Test
  public abstract void incidentEdges_checkReturnedSetMutability();

  @Test
  public void nodes_oneNode() {
    addNode(N1);
    assertThat(graph.nodes()).containsExactly(N1);
  }

  @Test
  public void nodes_noNodes() {
    assertThat(graph.nodes()).isEmpty();
  }

  @Test
  public void adjacentNodes_oneEdge() {
    putEdge(N1, N2);

import jcifs.internal.SMBProtocolDecodingException;

/**
 * Test class for NegotiateContextResponse interface and its implementations
 */
@ExtendWith(MockitoExtension.class)
class NegotiateContextResponseTest {

    @Mock
    private Configuration mockConfig;

    @Nested
    @DisplayName("PreauthIntegrityNegotiateContext Tests")
    class PreauthIntegrityNegotiateContextTest {

            assertEquals("share/", new SmbFile("smb1://server/share/").getName());
            // Test server name extraction
            assertEquals("server/", new SmbFile("smb1://server/").getName());
            // Test root name
            assertEquals("smb1://", new SmbFile("smb1://").getName());
        }

        @Test
        public void testGetParent() throws MalformedURLException {

        } else {
            return getOtherLocation(key);
        }
    } // -- InputLocation getLocation( Object )

    /**
     * Gets the map of nested element locations within this location.
     *
     * @return a map of keys to InputLocation instances for nested elements, or null if none
     */
    public java.util.Map<Object, InputLocation> getLocations() {
        return locations;

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.

    private static final int CHUNK_SIZE = 24;

    @Mock
    private SrvCopychunk mockChunk;

    @BeforeEach
    void setUp() {
    }

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test
        @DisplayName("Should create instance with source key and single chunk")
        void testConstructorWithSingleChunk() {
            // Given

import com.google.common.collect.testing.google.TestStringSetMultimapGenerator;
import java.util.Map.Entry;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullMarked;

/**
 * Unit tests for {@link HashMultimap}.
 *
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked
public class HashMultimapTest extends TestCase {

import com.google.common.collect.testing.google.TestStringSetMultimapGenerator;
import java.util.Map.Entry;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullMarked;

/**
 * Unit tests for {@link HashMultimap}.
 *
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked
public class HashMultimapTest extends TestCase {

        api("com.thoughtworks.qdox:qdox:2.0.3")
        api("com.uwyn:jhighlight:1.0")
        api("com.vladsch.flexmark:flexmark-all:0.34.60") {
            because("Higher versions tested are either incompatible (0.62.2) or bring additional unwanted dependencies (0.36.8)")
        }
        api("org.apache.pdfbox:pdfbox:2.0.24") {
            because("Flexmark 0.34.60 brings in a vulnerable version of pdfbox")

        return (DfsReferralDataImpl) base.combine(mockData);
    }

    @Nested
    @DisplayName("Interface Method Contract Tests")
    class InterfaceMethodTests {

        @Test
        @DisplayName("Should fixup host with FQDN")
        void testFixupHost() {
            String fqdn = "server.example.com";

            // Test with mock
            doNothing().when(mockReferralData).fixupHost(fqdn);