private static final Pattern REGEX_LOOKING_AT = Pattern.compile("bcd");
@Test
public void testLookingAt() {
StringReader reader = new StringReader(REGEX_DATA);
CharSequence text = new ReaderCharSequence(reader);
ReaderMatcher matcher = new ReaderMatcher(REGEX_LOOKING_AT, text);
matcher.region(1, text.length());
assertTrue(matcher.lookingAt());
matcher.region(2, text.length());
assertFalse(matcher.lookingAt());
}