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

    void suppressCleanup();

    void suppressCleanupErrors();

            def noCleanupOnErrorListener = new AbstractRunListener() {
                @Override
                void error(ErrorInfo error) {
                    provider.suppressCleanup()
                }
            }
            def spec = invocation.spec
            while (spec != null) {
                spec.addListener(noCleanupOnErrorListener)
                spec = spec.subSpec

    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;
    }

    public boolean isCleanup() {
        return cleanup;

        @Override
        TestFile getTestDirectory() {
            return projectDir
        }

        @Override
        void suppressCleanup() {

        }

        @Override
        void suppressCleanupErrors() {

        }
    }

    private final int num
    private final TestFile projectDir