From 46cf185d4f411040d3669734d77f7322abd883c9 Mon Sep 17 00:00:00 2001
From: x0b <x0b@users.noreply.github.com>
Date: Sat, 30 Jun 2018 17:16:45 +0200
Subject: [PATCH] fix off-by-one-error

---
 .../main/java/io/github/x0b/rfc3339parser/Rfc3339.java   | 2 +-
 .../java/io/github/x0b/rfc3339parser/Rfc3339Test.java    | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/rfc3339parser/src/main/java/io/github/x0b/rfc3339parser/Rfc3339.java b/rfc3339parser/src/main/java/io/github/x0b/rfc3339parser/Rfc3339.java
index 8e04c1e..aa19eda 100644
--- a/rfc3339parser/src/main/java/io/github/x0b/rfc3339parser/Rfc3339.java
+++ b/rfc3339parser/src/main/java/io/github/x0b/rfc3339parser/Rfc3339.java
@@ -178,7 +178,7 @@ private synchronized static Date parseOffset(Date date, String timeString) throw
     private static char getTimezoneStyle(String timeString, char... styleIds){
         for (char c: styleIds) {
             int lastIndex = timeString.lastIndexOf(c);
-            if(lastIndex != -1 && lastIndex > 19){
+            if(lastIndex != -1 && lastIndex >= 19){
                 return c;
             }
         }
diff --git a/rfc3339parser/src/test/java/io/github/x0b/rfc3339parser/Rfc3339Test.java b/rfc3339parser/src/test/java/io/github/x0b/rfc3339parser/Rfc3339Test.java
index 89ded2b..9644ac3 100644
--- a/rfc3339parser/src/test/java/io/github/x0b/rfc3339parser/Rfc3339Test.java
+++ b/rfc3339parser/src/test/java/io/github/x0b/rfc3339parser/Rfc3339Test.java
@@ -4,6 +4,8 @@
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.math.BigDecimal;
 import java.text.ParseException;
 import java.util.Calendar;
@@ -143,6 +145,13 @@ public void parseTimeZoneUnsupportedFail() throws ParseException {
         Rfc3339.parseTimezone("1996-12-19T16:39:57.203GMT0800");
     }
 
+    @Test
+    public void testInternalTzStyle() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
+        Method getTzStyle = Rfc3339.class.getDeclaredMethod("getTimezoneStyle", String.class, char[].class);
+        getTzStyle.setAccessible(true);
+        getTzStyle.invoke(null, "1996-12-19T16:39:57+01:30", new char[]{'+', '-', 'Z'});
+    }
+
     @Test
     public void parseCalendar() throws ParseException {
         String timeString = "1996-12-19T16:39:57.123+01:30";