@Test
public void testCharAt() {

  String line = "adsawseeeeegqewgasddga";
  Text text = new Text(line);
  for (int i = 0; i < line.length(); i++) {
    assertTrue("testCharAt error1 !!!", text.charAt(i) == line.charAt(i));
  }    
  assertEquals("testCharAt error2 !!!", -1, text.charAt(-1));    
  assertEquals("testCharAt error3 !!!", -1, text.charAt(100));
}