assertEquals("lib/tools.jar", config0.getChild("toolsJar").getValue());
            assertEquals(2, config0.getChildCount());
            Xpp3Dom config1 = (Xpp3Dom) jdks.getToolchains().get(1).getConfiguration();
            assertEquals(2, config1.getChildCount());
            assertEquals("lib/classes.jar", config1.getChild("toolsJar").getValue());
            assertEquals(2, jdksExtend.getToolchains().size());

                } else {
                    result = evaluator.evaluate(value);
                }
            }
            if (null == result && configuration.getChildCount() == 0) {
                value = configuration.getAttribute("default-value");
                if (null != value && !value.isEmpty()) {

        if (config == null) {
            return false;
        }

        // there are sub items ... so configuration is declared
        if (config.getChildCount() > 0) {
            return true;
        }

        String strValue = config.getValue();

        if (strValue == null || strValue.isEmpty()) {
            return false;
        }

    }

    private void checkUnknownMojoConfigurationParameters(MojoExecution mojoExecution) {
        if (mojoExecution.getConfiguration() == null
                || mojoExecution.getConfiguration().getChildCount() == 0) {
            return;
        }

        MojoDescriptor mojoDescriptor = mojoExecution.getMojoDescriptor();

        // in first step get parameter names of current goal

        assertEquals(1, md.getRequirements().size());
        assertEquals(1, md.getParameters().size());

        assertNotNull(md.getMojoConfiguration());
        assertEquals(1, md.getMojoConfiguration().getChildCount());

        PlexusConfiguration pc = md.getMojoConfiguration().getChild(0);

        assertEquals("${jar.finalName}", pc.getValue());
        assertEquals("${project.build.finalName}", pc.getAttribute("default-value"));

        }

        Object value = defaultValue;
        TypeLiteral<?> paramType = TypeLiteral.get(setterInfo.parameterType);

        if (!paramType.getRawType().isInstance(value)) {
            if (configuration.getChildCount() > 0) {
                throw new ComponentConfigurationException(
                        "Basic element '" + configuration.getName() + "' must not contain child elements");
            }

                .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");

                    if (org != val) {
                        dom.setAttribute(attr, val);
                    }
                }
                // Children
                for (int i = 0, l = dom.getChildCount(); i < l; i++) {
                    visit(dom.getChild(i));
                }
            }
        }

        private void visit(Extension extension) {
            if (extension != null) {

                    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);

String getAttribute(String); public void setAttribute(String, String); public Xpp3Dom getChild(int); public Xpp3Dom getChild(String); public void addChild(Xpp3Dom); public Xpp3Dom[] getChildren(); public Xpp3Dom[] getChildren(String); public int getChildCount(); public void removeChild(int); public Xpp3Dom getParent(); public void setParent(Xpp3Dom); public void writeToSerializer(String, pull.XmlSerializer) throws java.io.IOException; private static void mergeIntoXpp3Dom(Xpp3Dom, Xpp3Dom, Boolean);...