Launch 3 nodes on ports 7379 to 7381 with cluster enabled.

Add command CLUSTER NODES

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

@@ -0,0 +1,41 @@
+package redis.clients.jedis.tests.commands;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import redis.clients.jedis.HostAndPort;
+import redis.clients.jedis.Jedis;
+import redis.clients.jedis.tests.HostAndPortUtil;
+import redis.clients.jedis.tests.JedisTestBase;
+
+public class ClusterCommandsTest extends JedisTestBase {
+    private Jedis node1;
+    private Jedis node2;
+
+    @Before
+    public void setUp() throws Exception {
+	HostAndPort nodeInfo1 = HostAndPortUtil.getClusterServers().get(0);
+	HostAndPort nodeInfo2 = HostAndPortUtil.getClusterServers().get(1);
+
+	node1 = new Jedis(nodeInfo1.getHost(), nodeInfo1.getPort());
+	node1.connect();
+	node1.flushAll();
+
+	node2 = new Jedis(nodeInfo2.getHost(), nodeInfo2.getPort());
+	node2.connect();
+	node2.flushAll();
+    }
+
+    @After
+    public void tearDown() {
+	node1.disconnect();
+	node2.disconnect();
+    }
+
+    @Test
+    public void clusterNodes() {
+	String nodes = node1.clusterNodes();
+	assertEquals(1, nodes.split("\n").length);
+    }
+}