public void testValidationErrorUponNonUniqueDependencyKey()
        throws Exception
    {
        try
        {
            buildPom( "unique-dependency-key/deps" );
            fail( "Non-unique dependency keys did not cause validation error" );
        }
        catch ( ProjectBuildingException e )
        {
            // expected
        }
    }

    @Test

                // The index changed. We'll need to copy the previous entry.
                tailIndex = newIndex;
                tail = e;
              }
            }
            newTable.set(tailIndex, tail);

            // Clone nodes leading up to the tail.
            for (E e = head; e != tail; e = e.getNext()) {
              int newIndex = e.getHash() & newMask;
              E newNext = newTable.get(newIndex);

    /**
     * Associates {@code key} with {@code value} in the built map. Duplicate keys, according to the
     * comparator (which might be the keys' natural order), are not allowed, and will cause {@link
     * #build} to fail.
     */
    @CanIgnoreReturnValue
    @Override
    public Builder<K, V> put(K key, V value) {
      ensureCapacity(size + 1);
      checkEntryNotNull(key, value);
      keys[size] = key;

   * Ensures the truth of an expression involving one or more parameters to the calling method.
   *
   * @param expression a boolean expression
   * @param errorMessageTemplate a template for the exception message should the check fail. The
   *     message is formed by replacing each {@code %s} placeholder in the template with an
   *     argument. These are matched by position - the first {@code %s} gets {@code

            failure = new Failure(t);
          } catch (Exception | Error oomMostLikely) { // sneaky checked exception
            failure = Failure.FALLBACK_INSTANCE;
          }
          // Note: The only way this CAS could fail is if cancel() has raced with us. That is ok.
          boolean unused = ATOMIC_HELPER.casValue(this, valueToSet, failure);
        }
        return true;
      }

    try {
      iterator.next();
      fail("no exception thrown");
    } catch (NoSuchElementException expected) {
    }
    try {
      iterator.previous();
      fail("no exception thrown");
    } catch (NoSuchElementException expected) {
    }
    try {
      iterator.remove();
      fail("no exception thrown");
    } catch (UnsupportedOperationException expected) {
    }

   * {@code iterator} as it is returned.
   *
   * <p>The provided iterator must support {@link Iterator#remove()} or else the returned iterator
   * will fail on the first call to {@code next}. The returned {@link Iterator} is also not
   * thread-safe.
   *
   * @param iterator the iterator to remove and return elements from

            ModelBuilderRequest request) {
        // We only check for groupId/artifactId/version/classifier cause if there is another
        // module with the same groupId/artifactId/version/classifier this will fail the build
        // earlier like "Project '...' is duplicated in the reactor.
        // So it is sufficient to check only groupId/artifactId/version/classifier and not the
        // packaging type.

         * requireNonNull is generally safe: If cancel succeeded, then this Future was still
         * pending, so its `state` field hasn't been nulled out yet.
         *
         * OK, it's technically possible for this to fail in the presence of unsafe publishing, as
         * discussed in the comments in TimeoutFuture. TODO(cpovirk): Maybe check for null before
         * calling recordOutputCancellation?
         */

   * iterators that don't support remove, passing one to the FilteredEntryMultimap constructor would
   * lead to a multimap whose removal operations would fail. This method combines the predicates to
   * avoid that problem.
   */
  private static <K extends @Nullable Object, V extends @Nullable Object>
      Multimap<K, V> filterFiltered(