public void testGroup(String text, String regexp, String[] output) {
// RE2
Pattern p = Pattern.compile(regexp, options);
Matcher matchString = p.matcher(utf8Slice(text));
assertEquals(true, matchString.find());
assertEquals(utf8Slice(output[0]), matchString.group());
for (int i = 0; i < output.length; i++) {
assertEquals(output[i] == null ? null : utf8Slice(output[i]), matchString.group(i));
}
assertEquals(output.length - 1, matchString.groupCount());
// JDK
java.util.regex.Pattern pj = java.util.regex.Pattern.compile(regexp);
java.util.regex.Matcher matchStringj = pj.matcher(text);
// java.util.regex.Matcher matchBytes =
// p.matcher(text.getBytes(Charsets.UTF_8));
assertEquals(true, matchStringj.find());
// assertEquals(true, matchBytes.find());
assertEquals(output[0], matchStringj.group());
// assertEquals(output[0], matchBytes.group());
for (int i = 0; i < output.length; i++) {
assertEquals(output[i], matchStringj.group(i));
// assertEquals(output[i], matchBytes.group(i));
}
}
// Tests that both RE2 and JDK's Patterns/Matchers give the same groupCount.
public void testGroupCount(String pattern, int count) {
// RE2
Pattern p = Pattern.compile(pattern, options);
Matcher m = p.matcher(utf8Slice("x"));
assertEquals(count, p.groupCount());
assertEquals(count, m.groupCount());
// JDK
java.util.regex.Pattern pj = java.util.regex.Pattern.compile(pattern);
java.util.regex.Matcher mj = pj.matcher("x");
// java.util.regex.Pattern doesn't have group count in JDK.
assertEquals(count, mj.groupCount());
}
