// Test proto buffers.
PhoneNumber nzNumber = new PhoneNumber();
nzNumber.setCountryCode(64).setNationalNumber(33316005L).setExtension("3456");
assertEquals(PhoneNumberUtil.MatchType.EXACT_MATCH,
phoneUtil.isNumberMatch(nzNumber, "+643 331 6005 ext 3456"));
nzNumber.clearExtension();
assertEquals(PhoneNumberUtil.MatchType.EXACT_MATCH,
phoneUtil.isNumberMatch(nzNumber, "+6403 331 6005"));
// Check empty extensions are ignored.
nzNumber.setExtension("");
assertEquals(PhoneNumberUtil.MatchType.EXACT_MATCH,