@Test
 public void testFindLongestPalindrome() {
   String result = l.findLongestPalindrome("abc");
   assertEquals("a", result);
   result = l.findLongestPalindrome("ababa");
   assertEquals("ababa", result);
 }
 @Test(expected = RuntimeException.class)
 public void testFindLongestPalindromeThrowsException() {
   l.findLongestPalindrome("");
 }