add select to transaction

src/main/java/redis/clients/jedis/BinaryTransaction.java

@@ -563,4 +563,9 @@ public class BinaryTransaction extends Queable {
         client.brpoplpush(source, destination, timeout);
         return getResponse(BuilderFactory.BYTE_ARRAY);
     }
+    
+    public Response<String> select(final int index) {
+        client.select(index);
+        return getResponse(BuilderFactory.STRING);
+    }
 }

src/main/java/redis/clients/jedis/Transaction.java

@@ -576,5 +576,4 @@ public class Transaction extends BinaryTransaction {
         client.publish(channel, message);
         return getResponse(BuilderFactory.LONG);
     }
-
 }

src/test/java/redis/clients/jedis/tests/commands/TransactionCommandsTest.java

@@ -277,4 +277,22 @@ public class TransactionCommandsTest extends JedisCommandTestBase {
         }
         assertEquals("bar", lr.get(2).get());
     }
+    
+    @Test
+    public void select() {
+        jedis.select(1);
+        jedis.set("foo", "bar");
+        jedis.watch("foo");
+        Transaction t = jedis.multi();
+        t.select(0);
+        t.set("bar", "foo");
+        
+        Jedis jedis2 = createJedis();
+        jedis2.select(1);
+        jedis2.set("foo", "bar2");
+        
+        List<Object> results = t.exec();
+        
+        assertNull(results);
+    }
 }