implement a better regex for detecting mariadb gtid strs

Author: osheroff

src/main/java/com/github/shyiko/mysql/binlog/MariadbGtidSet.java

@@ -44,7 +44,11 @@ public MariadbGtidSet(String gtidSet) {
         }
     }
 
-    static Pattern MARIA_GTID_PATTERN = Pattern.compile("^\\d+-\\d+-\\d+");
+    static String threeDashes = "\\d{1,10}-\\d{1,10}-\\d{1,20}";
+
+    static Pattern MARIA_GTID_PATTERN = Pattern.compile(
+        "^" + threeDashes + "(\\s*,\\s*" + threeDashes + ")*$"
+    );
 
     public static boolean isMariaGtidSet(String gtidSet) {
         return MARIA_GTID_PATTERN.matcher(gtidSet).find();

src/test/java/com/github/shyiko/mysql/binlog/GtidSetTest.java

@@ -164,4 +164,5 @@ public void testPutUUIDSet() {
         assertEquals(gtidSet, gtidSet2);
     }
 
+
 }

src/test/java/com/github/shyiko/mysql/binlog/MariadbGtidSetTest.java

@@ -2,6 +2,8 @@
 
 import org.testng.annotations.Test;
 
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 import static org.testng.Assert.assertEquals;
 import static org.testng.Assert.assertNotEquals;
 
@@ -33,4 +35,12 @@ public void testEquals() {
         assertEquals(new MariadbGtidSet(""), new MariadbGtidSet(""));
         assertEquals(new MariadbGtidSet("0-0-7404"), new MariadbGtidSet("0-0-7404"));
     }
+
+    @Test
+    public void testMatcher() {
+        assertTrue(MariadbGtidSet.isMariaGtidSet("0-0-3323"));
+        assertTrue(MariadbGtidSet.isMariaGtidSet("0-0-3323,4-33-12342134,444-33-13412341233"));
+        assertTrue(MariadbGtidSet.isMariaGtidSet("0-0-3323, 4-33-12342134, 444-33-13412341233"));
+        assertFalse(MariadbGtidSet.isMariaGtidSet("07212070-4330-3bc8-8a3a-01e34be47bc3:1-141692942,a0c4a949-fae8-30f3-a4d2-fee56a1a9307:1-1427643460,a16ef643-1d4a-3fd9-a86e-1adeb836eb2d:1-1411988930,b0d822f4-5a84-30d3-a929-61f64740d7ac:1-59364"));
+    }
 }