projects.add(project2);
        project1.getDependencies().add(createDependency(project2));

        projects = new ProjectSorter(projects).getSortedProjects();

        assertEquals(project2, projects.get(0));
        assertEquals(project1, projects.get(1));
    }

    @Test
    void testMatchingGroupIdsDifferentArtifactIds() throws Exception {

        ProjectDependencyGraph projectDependencyGraph = new DefaultProjectDependencyGraph(projects);
        List<MavenProject> activeProjects = projectDependencyGraph.getSortedProjects();
        List<MavenProject> allSortedProjects = projectDependencyGraph.getSortedProjects();
        activeProjects = trimProjectsToRequest(activeProjects, projectDependencyGraph, session.getRequest());
        activeProjects =

                new DefaultProjectDependencyGraph(Arrays.asList(aProject, bProject, cProject)),
                Arrays.asList(aProject, cProject));
        final List<MavenProject> sortedProjects = graph.getSortedProjects();
        assertEquals(aProject, sortedProjects.get(0));
        assertEquals(cProject, sortedProjects.get(1));

        assertTrue(graph.getDownstreamProjects(aProject, false).contains(cProject));
    }

        boolean result = true;

        MavenProject topProject = session.getTopLevelProject();
        List<MavenProject> sortedProjects = session.getProjectDependencyGraph().getSortedProjects();
        for (MavenProject mavenProject : sortedProjects) {
            if (!topProject.getVersion().equals(mavenProject.getVersion())) {
                result = false;
                break;
            }

            List<String> expectedProjectNames = selectedProjectsResult.projectNames;
            List<MavenProject> actualReactorProjects = result.get().getSortedProjects();
            List<MavenProject> expectedReactorProjects =
                    expectedProjectNames.stream().map(artifactIdProjectMap::get).collect(toList());

        return sortedProjects.stream()
                .filter(MavenProject::isExecutionRoot)
                .findFirst()
                .orElse(null);
    }

    public List<MavenProject> getSortedProjects() {
        return sortedProjects;
    }

    public boolean hasMultipleProjects() {
        return sortedProjects.size() > 1;
    }

    public List<String> getDependents(String id) {

        boolean result = true;

        MavenProject topProject = session.getTopLevelProject();
        List<MavenProject> sortedProjects = session.getProjectDependencyGraph().getSortedProjects();
        for (MavenProject mavenProject : sortedProjects) {
            if (!topProject.getVersion().equals(mavenProject.getVersion())) {
                result = false;
                break;
            }

            @Override
            public List<MavenProject> getAllProjects() {
                return session.getAllProjects();
            }

            @Override
            public List<MavenProject> getSortedProjects() {
                return Collections.singletonList(session.getCurrentProject());
            }

            @Override

                .activeProfiles(request.getActiveProfiles())
                .pluginGroups(request.getPluginGroups())
                .build());
    }

    @Deprecated
    public List<MavenProject> getSortedProjects() {
        return getProjects();
    }

    @Deprecated
    //
    // Used by Tycho and will break users and force them to upgrade to Maven 3.1 so we should really leave

            }
        }

        if (!graphResult.hasErrors()) {
            ProjectDependencyGraph projectDependencyGraph = graphResult.get();
            session.setProjects(projectDependencyGraph.getSortedProjects());
            session.setAllProjects(projectDependencyGraph.getAllProjects());
            session.setProjectDependencyGraph(projectDependencyGraph);
        }

        return graphResult;
    }