Added a test case for TimeBasedUuidGenerator

src/test/java/org/jboss/netty/util/TimeBasedUuidGeneratorTest.java

@@ -0,0 +1,58 @@
+/*
+ * JBoss, Home of Professional Open Source
+ *
+ * Copyright 2008, Red Hat Middleware LLC, and individual contributors
+ * by the @author tags. See the COPYRIGHT.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+package org.jboss.netty.util;
+
+import static org.junit.Assert.*;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.UUID;
+
+import org.junit.Test;
+
+
+/**
+ * @author The Netty Project (netty-dev@lists.jboss.org)
+ * @author Trustin Lee (tlee@redhat.com)
+ *
+ * @version $Rev$, $Date$
+ *
+ */
+public class TimeBasedUuidGeneratorTest {
+    private static final int COUNT = 1048576;
+
+    @Test
+    public void shouldNotDuplicate() {
+        List<UUID> uuids = new ArrayList<UUID>(COUNT);
+        for (int i = 0; i < COUNT; i ++) {
+            uuids.add(TimeBasedUuidGenerator.generate());
+        }
+
+        Collections.sort(uuids);
+
+        for (int i = 1; i < COUNT; i ++) {
+            assertFalse(uuids.get(i - 1).equals(uuids.get(i)));
+        }
+    }
+}