public void testFromClass_FileSystem() throws Exception {
        final Traverser traverser = TraversalUtil.getTraverser(DummyTest.class);
        assertThat(traverser, is(notNullValue()));
        assertThat(traverser instanceof FileSystemTraverser, is(true));

        assertThat(traverser.isExistClass(DummyTest.class.getName()), is(true));
        assertThat(traverser.isExistClass(TestCase.class.getName()), is(not(true)));

    int NT_STATUS_ACCOUNT_LOCKED_OUT = 0xC0000234;
    /** The remote system refused the network connection */
    int NT_STATUS_CONNECTION_REFUSED = 0xC0000236;
    /** The pathname does not traverse a DFS junction */
    int NT_STATUS_PATH_NOT_COVERED = 0xC0000257;
    /** The IO operation on the reparse point failed */
    int NT_STATUS_IO_REPARSE_TAG_NOT_HANDLED = 0xC0000279;

     */
    int FILE_READ_EA = 0x00000008; // 4
    /**
     * Permission to write extended attributes
     */
    int FILE_WRITE_EA = 0x00000010; // 5
    /**
     * Permission to execute a file or traverse a directory
     */
    int FILE_EXECUTE = 0x00000020; // 6
    /**
     * Permission to delete a file or directory
     */
    int FILE_DELETE = 0x00000040; // 7
    /**
     * Permission to read file attributes

    /** The object was not found */
    int NT_STATUS_NOT_FOUND = 0xC0000225;
    /** The referenced account is currently locked out */
    int NT_STATUS_ACCOUNT_LOCKED_OUT = 0xC0000234;
    /** The pathname does not traverse a DFS junction */
    int NT_STATUS_PATH_NOT_COVERED = 0xC0000257;
    /** The IO operation on the reparse point failed */
    int NT_STATUS_IO_REPARSE_TAG_NOT_HANDLED = 0xC0000279;

    public static final int FILE_READ_EA = 0x00000008; // 4
    /** Permission to write extended attributes */
    public static final int FILE_WRITE_EA = 0x00000010; // 5
    /** Permission to execute a file or traverse a directory */
    public static final int FILE_EXECUTE = 0x00000020; // 6
    /** Permission to delete a file or directory */
    public static final int FILE_DELETE = 0x00000040; // 7

        return BeanUtil.copyBeanToNewBean(src, destClass);
    }

    /**
     * Builds a comprehensive error message from a throwable and its causes.
     * This method traverses the cause chain and concatenates all error messages.
     *
     * @param t the throwable to build message from
     * @return a string containing all error messages in the cause chain
     */