}

    public Set<String> getListeners() {
        return listeners;
    }

    public Set<String> getExcludeGroups() {
        return excludeGroups;
    }

    public Set<String> getIncludeGroups() {
        return includeGroups;
    }

    public boolean getUseDefaultListeners() {
        return useDefaultListener;
    }

    public String getThreadPoolFactoryClass() {

            options.getUseDefaultListeners(), options.getThreadPoolFactoryClass(),
            options.getIncludeGroups(), options.getExcludeGroups(), options.getListeners(),
            options.getConfigFailurePolicy(), options.getPreserveOrder(), options.getGroupByInstances(), dryRun.get()
        );
    }

    @Override

        }

        testNg.setUseDefaultListeners(spec.getUseDefaultListeners());
        testNg.setVerbose(0);
        testNg.setGroups(CollectionUtils.join(",", spec.getIncludeGroups()));
        testNg.setExcludedGroups(CollectionUtils.join(",", spec.getExcludeGroups()));

        // Adding custom test listeners before Gradle's listeners.

    public void setOutputDirectory(File outputDirectory) {
        this.outputDirectory = outputDirectory;
    }

    /**
     * The set of groups to run.
     */
    @Input
    public Set<String> getIncludeGroups() {
        return includeGroups;
    }

    public void setIncludeGroups(Set<String> includeGroups) {
        this.includeGroups = includeGroups;
    }

    /**

        then: 1 * processor.completed(1, { it.resultType == null})

        0 * processor._
    }

    void "includes and excludes groups"() {
        given:
        _ * spec.getIncludeGroups() >> ['group1', 'group2']
        _ * spec.getExcludeGroups() >> ['group3']

        when: process(ATestNGClassWithGroups)

        then:
        1 * processor.started({ it.id == 1 } , _)

        } else if (TestNGOptions.class.isAssignableFrom(frameworkOptions.getClass())) {
            TestNGOptions testNGOptions = (TestNGOptions) frameworkOptions;
            return testNGOptions.getIncludeGroups().isEmpty()
                && testNGOptions.getExcludeGroups().isEmpty();
        } else {
            throw new IllegalArgumentException("Unknown test framework: " + frameworkOptions.getClass().getName());

Method <org.gradle.api.tasks.testing.testng.TestNGOptions.getGroupByInstances()> does not have raw return type assignable to org.gradle.api.provider.Property in (TestNGOptions.java:0)
Method <org.gradle.api.tasks.testing.testng.TestNGOptions.getIncludeGroups()> does not have raw return type assignable to org.gradle.api.provider.Property in (TestNGOptions.java:0)