Set<MavenProject> unfinishedProjects = graph.getUnfinishedProjects();
        assertEquals(5, unfinishedProjects.size());

        graph.markAsFinished(schedulableNewProcesses.get(0));
        assertEquals(2, graph.getFinishedProjects().size());
        assertEquals(4, graph.getUnfinishedProjects().size());

        return result;
    }

    /**
     * @return set of projects that have yet to be processed successfully by the build.
     */
    public Set<MavenProject> getUnfinishedProjects() {
        Set<MavenProject> unfinished = new HashSet<>(projectBuilds.getProjects());
        unfinished.removeAll(finishedProjects);
        return unfinished;
    }

    /**