byte[] buffer = new byte[24];

        // Mock allocation size (8 bytes)
        for (int i = 0; i < 8; i++) {
            buffer[i] = (byte) i;
        }

        // Mock end of file (8 bytes)
        for (int i = 8; i < 16; i++) {
            buffer[i] = (byte) (i * 2);
        }

        // Mock number of links (4 bytes)
        buffer[16] = 0x01;
        buffer[17] = 0x00;

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    6.4. In the event of termination under Sections 6.1 or 6.2 above,
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   * will silently add the missing nodes to the graph, then add the edge connecting them. We are not
   * using the proxy methods here as we want to test {@code addEdge} when the end-points are not
   * elements of the graph.
   */
  @Test
  public void addEdge_nodesNotInGraph() {
    assume().that(graphIsMutable()).isTrue();

    networkAsMutableNetwork.addNode(N1);

   * will silently add the missing nodes to the graph, then add the edge connecting them. We are not
   * using the proxy methods here as we want to test {@code addEdge} when the end-points are not
   * elements of the graph.
   */
  @Test
  public void addEdge_nodesNotInGraph() {
    assume().that(graphIsMutable()).isTrue();

    networkAsMutableNetwork.addNode(N1);