Xpp3Dom result = Xpp3Dom.mergeXpp3Dom(dominantConfig, recessiveConfig);
        Xpp3Dom items = result.getChild("items");

        assertEquals(3, items.getChildCount());

        assertNull(items.getChild(0).getValue());
        assertEquals("test", items.getChild(1).getValue());
        assertNull(items.getChild(2).getValue());
    }

    /**

                .getConfigProperties()
                .get("aether.transport.wagon.config.repository");
        assertNotNull(plexusConfiguration);
        assertEquals(0, plexusConfiguration.getChildCount());
    }

    @Test
    void httpConfigurationWithHttpHeadersTest() throws InvalidRepositoryException {
        Server server = new Server();
        server.setId("repository");

                }
            }
        }
        return null;
    }

    public List<XmlNode> getChildren() {
        return children;
    }

    public int getChildCount() {
        return children.size();
    }

    // ----------------------------------------------------------------------
    // Input location handling

                    throw new ComponentConfigurationException(configuration, msg, e);
                }
            }

            if (value == null && (config == null || config.getChildCount() <= 0)) {
                invalidParameters.add(parameter);
            }
        }

        if (!invalidParameters.isEmpty()) {
            throw new PluginParameterException(mojoDescriptor, invalidParameters);