add testcase & bug fixed

src/main/java/com/alibaba/druid/pool/DruidPooledResultSet.java

@@ -93,6 +93,10 @@ public final class DruidPooledResultSet extends PoolableWrapper implements Resul
             throw checkException(t);
         }
     }
+    
+    public int getFetchRowCount() {
+        return fetchRowCount;
+    }
 
     @Override
     public boolean wasNull() throws SQLException {