+ "  </dependencyManagement>\n"
            + "</project>\n";

    @Test
    void testCycleInImports() throws Exception {
        ModelBuilder builder = new DefaultModelBuilderFactory().newInstance();
        assertNotNull(builder);

        DefaultModelBuildingRequest request = new DefaultModelBuildingRequest();
        request.setModelSource(new StringModelSource(BASE1));

    }

    @Test
    void testOneProblem() {
        ProblemCollector problemCollector = ProblemCollectorFactory.newInstance(null);
        problemCollector.add(Problem.Severity.ERROR, "MESSAGE", 3, 5, new Exception());
        ToolchainsBuildingException e = new ToolchainsBuildingException(problemCollector.getProblems());
        assertEquals(

    }

    @Test
    void testV4ModelPriority() {
        Model m = model.withBuild(Build.newInstance()
                .withPlugins(Collections.singleton(Plugin.newInstance()
                        .withExecutions(Collections.singleton(
                                PluginExecution.newInstance().withPriority(5))))));
        assertEquals("4.0.0", new MavenModelVersion().getModelVersion(m));
    }

class ProblemCollectorFactoryTest {

    @Test
    void testNewInstance() {
        ProblemCollector collector1 = ProblemCollectorFactory.newInstance(null);

        Problem problem = new DefaultProblem("MESSAGE1", null, null, -1, -1, null);
        ProblemCollector collector2 = ProblemCollectorFactory.newInstance(Collections.singletonList(problem));

        assertNotSame(collector1, collector2);
        assertEquals(0, collector1.getProblems().size());

    public static final String NAME = "plugins";

    @Override
    public MetadataGenerator newInstance(RepositorySystemSession session, InstallRequest request) {
        return new PluginsMetadataGenerator(session, request);
    }

    @Override
    public MetadataGenerator newInstance(RepositorySystemSession session, DeployRequest request) {
        return new PluginsMetadataGenerator(session, request);
    }

    public static final String NAME = "snapshot";

    @Override
    public MetadataGenerator newInstance(RepositorySystemSession session, InstallRequest request) {
        return new LocalSnapshotMetadataGenerator(session, request);
    }

    @Override
    public MetadataGenerator newInstance(RepositorySystemSession session, DeployRequest request) {
        return new RemoteSnapshotMetadataGenerator(session, request);

    public static final String NAME = "versions";

    @Override
    public MetadataGenerator newInstance(RepositorySystemSession session, InstallRequest request) {
        return new VersionsMetadataGenerator(session, request);
    }

    @Override
    public MetadataGenerator newInstance(RepositorySystemSession session, DeployRequest request) {
        return new VersionsMetadataGenerator(session, request);
    }

        return new File(Paths.get(BASE_DIR, name + ".xml").toString()).getAbsoluteFile();
    }

    @Test
    void testCompleteWiring() throws Exception {
        ModelBuilder builder = new DefaultModelBuilderFactory().newInstance();
        assertNotNull(builder);

        DefaultModelBuildingRequest request = new DefaultModelBuildingRequest();
        request.setProcessPlugins(true);
        request.setPomFile(getPom("simple"));

  private ReentrantLock lock02;
  private ReentrantLock lock03;

  @Override
  protected void setUp() throws Exception {
    super.setUp();
    CycleDetectingLockFactory factory = CycleDetectingLockFactory.newInstance(Policies.THROW);
    lockA = factory.newReentrantLock("LockA");
    lockB = factory.newReentrantLock("LockB");
    lockC = factory.newReentrantLock("LockC");

  private ReentrantLock lock02;
  private ReentrantLock lock03;

  @Override
  protected void setUp() throws Exception {
    super.setUp();
    CycleDetectingLockFactory factory = CycleDetectingLockFactory.newInstance(Policies.THROW);
    lockA = factory.newReentrantLock("LockA");
    lockB = factory.newReentrantLock("LockB");
    lockC = factory.newReentrantLock("LockC");