assertTrue(exception.getStackTrace().length > 0);

        // Should contain this test method in stack trace
        boolean foundTestMethod = false;
        for (StackTraceElement element : exception.getStackTrace()) {
            if (element.getMethodName().contains("testStackTracePreservation")) {
                foundTestMethod = true;
                break;
            }
        }

    private List<File> filesToDelete = new ArrayList<>();

    private final String baseFilename;

    private final String fileSuffix;

    private StackTraceElement callerInfo;

    private Thread cleanupWarning;

    private boolean warnAboutCleanup = false;

    public TestFileManager(String baseFilename, String fileSuffix) {
        this.baseFilename = baseFilename;

    private final int flags;
    private final int access;
    private final int attrs;
    private final int options;
    private final String unc;

    private final StackTraceElement[] creationBacktrace;

    private final long initialSize;

    /**
     * @param cfg
     * @param fid
     * @param tree
     * @param unc
     * @param options
     * @param attrs