@Test
public void testGrokISO8601() {
String str = "{ dictionaryFiles : [target/test-classes/grok-dictionaries/grok-patterns] }";
GrokDictionaries dicts = new GrokDictionaries(ConfigFactory.parseString(str), new Configs());
Pattern pattern = dicts.compileExpression("%{TIMESTAMP_ISO8601:timestamp}");
assertTrue(pattern.matcher("2007-03-01T13:00:00").matches());
assertTrue(pattern.matcher("2007-03-01T13:00:00Z").matches());
assertTrue(pattern.matcher("2007-03-01T13:00:00+01:00").matches());
assertTrue(pattern.matcher("2007-03-01T13:00:00+0100").matches());
assertTrue(pattern.matcher("2007-03-01T13:00:00+01").matches());
assertFalse(pattern.matcher("2007-03-01T13:00:00Z+01:00").matches());
}