// here too.
  static final String ERROR_MODIFIABLE_SET = "Set returned is unexpectedly modifiable";
  static final String ERROR_SELF_LOOP = "self-loops are not allowed";
  static final String ERROR_ADDED_SELF_LOOP = "Should not be allowed to add a self-loop edge.";

  /** Creates and returns an instance of the graph to be tested. */
  abstract Graph<Integer> createGraph();

  /**

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        when(config.getPid()).thenReturn(12345);
        when(config.getSendBufferSize()).thenReturn(65536);

        target = new SmbPipeHandleImpl(pipe);
    }

    @Test
    @DisplayName("unwrap returns self for assignable type; throws for incompatible and null")
    void testUnwrap() {
        // Happy path: unwrap to concrete type
        SmbPipeHandleImpl unwrapped = target.unwrap(SmbPipeHandleImpl.class);

    }

    @Test
    void testSelfReferencingDependencyInRawModel() throws Exception {
        SimpleProblemCollector result = validateRaw("raw-model/self-referencing.xml");

        assertViolations(result, 1, 0, 0);

        assertEquals(

  private static final String ERROR_PARALLEL_EDGE = "connected by a different edge";
  private static final String ERROR_NEGATIVE_COUNT = "is non-negative";
  static final String ERROR_SELF_LOOP = "self-loops are not allowed";

  @Test
  public void transitiveClosure_directedGraph_addSelfLoopsAlways() {
    MutableGraph<Integer> directedGraph = GraphBuilder.directed().allowsSelfLoops(false).build();

 * {@link EndpointPair} of an undirected edge is an unordered pair of nodes ({@link #nodeU()} and
 * {@link #nodeV()}).
 *
 * <p>The edge is a self-loop if, and only if, the two endpoints are equal.
 *
 * @author James Sexton
 * @since 20.0
 */
@Immutable(containerOf = {"N"})
public abstract class EndpointPair<N> implements Iterable<N> {
  private final N nodeU;

	if topE == nil {
		scannerLogIf(GlobalContext, errors.New("forceCompact: root not found"))
		return
	}
	// If off by 2 orders of magnitude, compact self and log error.
	if len(topE.Children) > dataScannerForceCompactAtFolders {
		// If we still have too many children, compact self.

        // Close of try-with-resources should call close on the mock
        verify(tree, times(1)).close();
    }

    @Test
    @DisplayName("unwrap: returns self for compatible type and throws for incompatible")
    @SuppressWarnings({ "rawtypes", "unchecked" })
    void testUnwrap() {
        SmbSessionImpl session = newSession();

        assertSame(mockFileEntry2, retrievedEntries[1]);
    }

    @Test
    @DisplayName("Test nextElement method")
    void testNextElement() {
        // First call returns self
        SmbComTransactionResponse result = response.nextElement();
        assertSame(response, result);
    }

    @Test
    @DisplayName("Test hasMoreElements method")
    void testHasMoreElements() {

        assertNotNull(result);
        assertEquals(disconnectRequest, result);
        verify(request, times(1)).ignoreDisconnect();
    }

    @Test
    @DisplayName("Test ignoreDisconnect returns self")
    void testIgnoreDisconnectReturnsSelf() {
        // Given
        when(request.ignoreDisconnect()).thenReturn(request);

        // When
        CommonServerMessageBlock result = request.ignoreDisconnect();