--- /dev/null
+
+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.openflow.util;
+
+import java.math.BigInteger;
+
+import junit.framework.TestCase;
+
+public class U64Test extends TestCase {
+ /**
+ * Tests that we correctly translate unsigned values in and out of a long
+ * @throws Exception
+ */
+ public void test() throws Exception {
+ BigInteger val = new BigInteger("ffffffffffffffff", 16);
+ TestCase.assertEquals(-1, U64.t(val));
+ TestCase.assertEquals(val, U64.f(-1));
+ }
+}