if (suiteXmlBuilder != null) {
            return suiteXmlBuilder.getMetaClass().getProperty(suiteXmlBuilder, name);
        }

        throw new MissingPropertyException(name, getClass());
    }

    public Object methodMissing(String name, Object args) {
        if (suiteXmlBuilder != null) {
            return suiteXmlBuilder.getMetaClass().invokeMethod(suiteXmlBuilder, name, args);

    public final Sample sample = new Sample(testDirectoryProvider)

    @Before
    void setUp() {
        executer.withRepositoryMirrors()
    }

    @Test
    @UsesSample('testing/testng-suitexmlbuilder')
    void suiteXmlBuilder() {
        def testDir = sample.dir.file('groovy')
        executer.inDirectory(testDir).withTasks('clean', 'test').run()

        def result = new DefaultTestExecutionResult(testDir)

     * https://discuss.gradle.org/t/calling-suitexmlbuilder-changes-invocation-context-in-usetestng-block-2-11-nightly/13227
     */
    def "can reference suiteXmlBuilder"() {
        given:
        buildFile << '''
            apply plugin: 'java'
            test {
              useTestNG {
                println "Property from task: $name"
                suiteXmlBuilder()
                println "Property from task again: $name"

plugins {
    id 'java'
}

repositories {
    mavenCentral()
}

dependencies {
    testImplementation 'org.testng:testng:6.3.1'
}

test {
	useTestNG() {
        suiteXmlBuilder().suite(name: 'testing-testng') {
            test (name : 'testing-testng', annotations : 'JDK', verbose:'1') {
                classes([:]) {
                    'class' (name: 'org.gradle.testng.UserImplTest') {
                        methods([:]) {

            ${mavenCentralRepository()}
            dependencies {
                ${testFrameworkDependencies}
            }
            test {
              ${configureTestFramework} {
                suiteXmlBuilder().suite(name: 'AwesomeSuite') {
                    test (name: 'AwesomeTest') {
                        classes([:]) {
                            'class' (name: 'FooTest')

            ${mavenCentralRepository()}
            dependencies {
                ${testFrameworkDependencies}
            }
            test {
              ${configureTestFramework} {
                suiteXmlBuilder().suite(name: 'AwesomeSuite') {
                    test (name: 'AwesomeTest') {
                        classes([:]) {
                            'class' (name: 'FooTest')

        'includeGroups'       | '= ["group to include"]'
        'outputDirectory'     | '= file("$buildDir/my-out")'
        'suiteXmlFiles'       | '= [file("suite.xml")]'
        'suiteXmlBuilder()'   | '''
                                .suite(name: 'MySuite') {
                                    test(name: 'MyTest') {
                                        classes([:]) {

Method <org.gradle.api.tasks.testing.testng.TestNGOptions.suiteXmlBuilder()> has arguments/return type groovy.xml.MarkupBuilder that is not Gradle public API or primitive or built-in JDK classes or Kotlin classes in (TestNGOptions.java:0)