assertResultShowNoError(results);
        assertEquals(parentPom, findChildProject(results).getParentFile());
        Collections.reverse(toRead);
        results = projectBuilder.build(toRead, false, configuration);
        assertResultShowNoError(results);
        assertEquals(parentPom, findChildProject(results).getParentFile());
    }

    private MavenProject findChildProject(List<ProjectBuildingResult> results) {

        File pom0 = new File(localRepo, "p0/pom.xml");
        File pom1 = new File(pom0.getParentFile(), "p1/pom.xml");
        File pom2 = new File(pom1.getParentFile(), "p2/pom.xml");
        File pom3 = new File(pom2.getParentFile(), "p3/pom.xml");
        File pom4 = new File(pom3.getParentFile(), "p4/pom.xml");
        File pom5 = new File(pom4.getParentFile(), "p5/pom.xml");

    File file = root();
    assertThat(file.getParentFile()).isNull();
    assertThat(file.getCanonicalFile().getParentFile()).isNull();
    Files.createParentDirs(file);
  }

  public void testCreateParentDirs_relativePath() throws IOException {
    File file = file("nonexistent.file");
    assertThat(file.getParentFile()).isNull();
    assertThat(file.getCanonicalFile().getParentFile()).isNotNull();
    Files.createParentDirs(file);

    File file = root();
    assertThat(file.getParentFile()).isNull();
    assertThat(file.getCanonicalFile().getParentFile()).isNull();
    Files.createParentDirs(file);
  }

  public void testCreateParentDirs_relativePath() throws IOException {
    File file = file("nonexistent.file");
    assertThat(file.getParentFile()).isNull();
    assertThat(file.getCanonicalFile().getParentFile()).isNotNull();
    Files.createParentDirs(file);

    void testDependencyManagementExclusionsExcludeTransitively() throws Exception {
        File localRepo = getLocalRepositoryPath();

        File pom0 = new File(localRepo, "p0/pom.xml");
        File pom0Basedir = pom0.getParentFile();
        File pom1 = new File(pom0Basedir, "p1/pom.xml");

        // load the child project, which inherits from p0...
        MavenProject project0 = getProjectWithDependencies(pom0);

        a.setFile(file);

        File touchFile = updateCheckManager.getTouchfile(a);
        touchFile.delete();

        assertTrue(updateCheckManager.isUpdateRequired(a, remoteRepository));

        file.getParentFile().mkdirs();
        file.createNewFile();
        updateCheckManager.touch(a, remoteRepository, null);

        assertFalse(updateCheckManager.isUpdateRequired(a, remoteRepository));

        assertNull(

        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
        if(!outputFile.getParentFile().exists()) {
            if(!outputFile.getParentFile().mkdirs()) {
                System.out.println(
                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
            }
        }

                .setPluginArtifactRepositories(getPluginArtifactRepositories())
                .setGoals(Arrays.asList("package"));

        if (pom != null) {
            request.setMultiModuleProjectDirectory(pom.getParentFile());
        }

        return request;
    }

    // layer the creation of a project builder configuration with a request, but this will need to be

    @Test
    void testDependencyManagement() throws Exception {
        File localRepo = getLocalRepositoryPath();
        File pom0 = new File(localRepo, "p0/pom.xml");

        File pom0Basedir = pom0.getParentFile();

        File pom1 = new File(pom0Basedir, "p1/pom.xml");

        // load everything...
        MavenProject project1 = getProjectWithDependencies(pom1);

    }

    public File createFile(File dir, String filename, String contents, String encoding) throws IOException {
        File file = new File(dir, filename);

        file.getParentFile().mkdirs();

        FileUtils.fileWrite(file.getPath(), encoding, contents);

        markForDeletion(file);

        return file;
    }