assertEquals(1, collector2.getProblems().size());
    }

    @Test
    void testAddProblem() {
        ProblemCollector collector = ProblemCollectorFactory.newInstance(null);
        collector.setSource("pom.xml");
        collector.add(Problem.Severity.ERROR, "Error message", 10, 5, null);
        collector.add(Problem.Severity.WARNING, "Warning message", 15, 3, null);

        List<Problem> problems = collector.getProblems();

     * their source, but the next messages will use the new source.
     *
     * @param source a source
     */
    void setSource(String source);

    /**
     *
     * @return the collected Problems, never {@code null}
     */
    List<Problem> getProblems();

                e.getMessage());
    }

    @Test
    void testUnknownPosition() {
        ProblemCollector problemCollector = ProblemCollectorFactory.newInstance(null);
        problemCollector.setSource("SOURCE");
        problemCollector.add(Problem.Severity.ERROR, "MESSAGE", -1, -1, new Exception());
        ToolchainsBuildingException e = new ToolchainsBuildingException(problemCollector.getProblems());
        assertEquals(

        this.problems = (problems != null) ? problems : new ArrayList<>();
    }

    @Override
    public List<Problem> getProblems() {
        return problems;
    }

    @Override
    public void setSource(String source) {
        this.source = source;
    }

    @Override
    public void add(Problem.Severity severity, String message, int line, int column, Exception cause) {

    public static Profile convertFromProfileXmlProfile(org.apache.maven.profiles.Profile profileXmlProfile) {
        Profile profile = new Profile();

        profile.setId(profileXmlProfile.getId());

        profile.setSource("profiles.xml");

        org.apache.maven.profiles.Activation profileActivation = profileXmlProfile.getActivation();

        if (profileActivation != null) {
            Activation activation = new Activation();

        PersistedToolchains userToolchains = readToolchains(request.getUserToolchainsSource(), request, problems);

        toolchainsMerger.merge(userToolchains, globalToolchains, TrackableBase.GLOBAL_LEVEL);

        problems.setSource("");

        userToolchains = interpolate(userToolchains, problems);

        if (hasErrors(problems.getProblems())) {
            throw new ToolchainsBuildingException(problems.getProblems());
        }

    }

    private PluginDescriptor build(String source, PlexusConfiguration c) throws PlexusConfigurationException {
        PluginDescriptor pluginDescriptor = new PluginDescriptor();

        pluginDescriptor.setSource(source);
        pluginDescriptor.setGroupId(extractGroupId(c));
        pluginDescriptor.setArtifactId(extractArtifactId(c));
        pluginDescriptor.setVersion(extractVersion(c));