new File(rDeps.get(0).getSystemPath()).getAbsolutePath());
    }

    @Test
    public void testRecursiveExpressionCycleNPE() throws Exception {
        Map<String, String> props = new HashMap<>();
        props.put("aa", "${bb}");
        props.put("bb", "${aa}");
        DefaultModelBuildingRequest request = new DefaultModelBuildingRequest();

        Model model = new Model(

        String mavenVersion = rtInfo.getMavenVersion();

        if (mavenVersion == null || mavenVersion.isEmpty()) {
            throw new InitializationException("Unable to read Maven version from maven-core");
        }

        applicationVersion = new DefaultArtifactVersion(mavenVersion);
    }

        private PluginValidationIssues() {
            this.pluginDeclarations = new LinkedHashSet<>();
            this.pluginIssues = new HashMap<>();
            this.mojoIssues = new HashMap<>();
        }

        private synchronized void reportPluginIssue(
                IssueLocality issueLocality, String pluginDeclaration, String issue) {

    @Override
    public QName getName() {
        return new QName(null, node.name());
    }

    @Override
    public boolean isCollection() {
        return false;
    }

    @Override
    public boolean isLeaf() {
        return node.children().isEmpty();
    }

    @Override
    public void setValue(Object value) {
        throw new UnsupportedOperationException();
    }

    @Override

        throw new UnsupportedOperationException("Cannot change the version information for an attached artifact."
                + " It is derived from the main artifact.");
    }

    @Override
    public String getBaseVersion() {
        return parent.getBaseVersion();
    }

    @Override
    public void setBaseVersion(String baseVersion) {

        scanner.next();
    }

    private void parseHtmlEncodedChar(StringBuilder buffer) {
        scanner.next(2);
        scanner.mark();
        scanner.find(';');
        String value = new String(new char[]{(char) Integer.parseInt(scanner.region())});
        buffer.append(value);
        scanner.next();
    }

    private void parseJavadocTag(TokenVisitor visitor) {
        // start of tag marker

    }

    private void validateIdentity() {
        if (empty(groupId)) {
            throw new InvalidArtifactRTException(
                    groupId, artifactId, getVersion(), type, "The groupId cannot be empty.");
        }

        if (empty(artifactId)) {
            throw new InvalidArtifactRTException(
                    groupId, artifactId, getVersion(), type, "The artifactId cannot be empty.");

        MavenExecutionRequest mavenExecutionRequest = new DefaultMavenExecutionRequest();
        mavenExecutionRequest.setExecutionListener(new AbstractExecutionListener());
        mavenExecutionRequest.setGoals(Arrays.asList("clean"));
        final MavenSession session = new MavenSession(
                null,
                new DefaultRepositorySystemSession(h -> false),

    private static final int INCOMPARABLE = 2;

    /**
     * Keep track of all methods with the same name.
     */
    private final Map<String, List<Method>> methodByNameMap = new Hashtable<>();

    /**
     * Add a method to a list of methods by name.
     * For a particular class we are keeping track
     * of all the methods with the same name.
     *
     * @param method The method

        try {
            if (source != null) {
                return new MavenXpp3ReaderEx().read(reader, strict, source);
            } else {
                return new MavenXpp3Reader().read(reader, strict);
            }
        } catch (XmlPullParserException e) {
            throw new ModelParseException(e.getMessage(), e.getLineNumber(), e.getColumnNumber(), e);
        }
    }