TestingExtension testing = project.getExtensions().getByType(TestingExtension.class);
        ExtensiblePolymorphicDomainObjectContainer<TestSuite> testSuites = testing.getSuites();
        testSuites.registerBinding(JvmTestSuite.class, DefaultJvmTestSuite.class);

        project.getTasks().withType(Test.class).configureEach(test -> {

    /**
     * Available test suites in this project.
     *
     * The type of test suites available depend on which other plugins are applied.
     */
    ExtensiblePolymorphicDomainObjectContainer<TestSuite> getSuites();

    }

    @Inject
    public abstract ObjectFactory getObjectFactory();

    @Override
    public ExtensiblePolymorphicDomainObjectContainer<TestSuite> getSuites() {
        return suites;
    }

        if (testing == null) {
            throw new GradleException(message);
        }

        TestSuite defaultTestSuite = testing.getSuites().findByName(JvmTestSuitePlugin.DEFAULT_TEST_SUITE_NAME);
        if (!(defaultTestSuite instanceof JvmTestSuite)) {
            throw new GradleException(message);
        }

        return (JvmTestSuite) defaultTestSuite;

            htmlReport,
            copiedOptions,
            dryRun);
    }

    @Override
    public WorkerTestClassProcessorFactory getProcessorFactory() {
        List<File> suiteFiles = options.getSuites(testTaskTemporaryDir.create());
        TestNGSpec spec = toSpec(options, filter);
        return new TestNgTestClassProcessorFactory(this.options.getOutputDirectory(), spec, suiteFiles);
    }

            final TestingExtension testing = project.getExtensions().getByType(TestingExtension.class);
            final ExtensiblePolymorphicDomainObjectContainer<TestSuite> testSuites = testing.getSuites();

            testSuites.withType(JvmTestSuite.class).configureEach(suite -> {
                suite.getTargets().configureEach(target -> {

            TestingExtension testing = project.getExtensions().getByType(TestingExtension.class);
            ExtensiblePolymorphicDomainObjectContainer<TestSuite> testSuites = testing.getSuites();

            testSuites.withType(JvmTestSuite.class).all(testSuite -> {
                reporting.getReports().create(testSuite.getName() + "CodeCoverageReport", JacocoCoverageReport.class, report -> {

            TestingExtension testing = project.getExtensions().getByType(TestingExtension.class);
            ExtensiblePolymorphicDomainObjectContainer<TestSuite> testSuites = testing.getSuites();

            testSuites.withType(JvmTestSuite.class).all(testSuite -> {
                reporting.getReports().create(testSuite.getName() + "AggregateTestReport", AggregateTestReport.class, report -> {

    }

    /**
     * Add suite files by File objects.
     */
    public void suites(File... suiteFiles) {
        suiteXmlFiles.addAll(Arrays.asList(suiteFiles));
    }

    public List<File> getSuites(File testSuitesDir) {
        List<File> suites = new ArrayList<File>();

        suites.addAll(suiteXmlFiles);

        String suiteXmlMarkup = getSuiteXml();
        if (suiteXmlMarkup != null) {

        final TestingExtension testing = project.getExtensions().getByType(TestingExtension.class);
        final IdeaModule ideaModule = ideaModelFor(project).getModule();
        testing.getSuites().withType(JvmTestSuite.class).configureEach(suite -> {
            ideaModule.getTestSources().from(suite.getSources().getAllJava().getSourceDirectories());