private boolean suppressCleanupErrors = false;

    protected AbstractTestDirectoryProvider(TestFile root, Class<?> testClass) {
        this.root = root;
        this.className = shortenPath(testClass.getSimpleName(), 16);
    }

    @Override
    public void suppressCleanup() {
        cleanup = false;
    }

    @Override
    public void suppressCleanupErrors() {
        suppressCleanupErrors = true;

@IntegrationTestTimeout(300)
class InProcessGroovyCompilerIntegrationTest extends AbstractApiGroovyCompilerIntegrationSpec {

    def setup() {
        if (groovyVersionNumber < "2.0") {
            testDirectoryProvider.suppressCleanupErrors()
        }
    }

    String compilerConfiguration() {
'''
    tasks.withType(GroovyCompile) {
        groovyOptions.fork = false
    }
'''
    }

    /**
     * The directory to use, guaranteed to exist.
     *
     * @return The directory to use, guaranteed to exist.
     */
    TestFile getTestDirectory();

    void suppressCleanup();

    void suppressCleanupErrors();

        @Override
        TestFile getTestDirectory() {
            return projectDir
        }

        @Override
        void suppressCleanup() {

        }

        @Override
        void suppressCleanupErrors() {

        }
    }

    private final int num
    private final TestFile projectDir
    private List<File> implClasspath = []

    PluginUnderTest(TestFile projectDir) {