--- /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 java.nio.ByteBuffer;
+
+import junit.framework.TestCase;
+
+public class UnsignedTest extends TestCase {
+ public static String ULONG_MAX = "18446744073709551615";
+
+ /**
+ * Tests that we correctly extract an unsigned long into a BigInteger
+ * @throws Exception
+ */
+ public void testGetUnsignedLong() throws Exception {
+ ByteBuffer bb = ByteBuffer.allocate(8);
+ bb.put((byte)0xff).put((byte)0xff).put((byte)0xff).put((byte)0xff);
+ bb.put((byte)0xff).put((byte)0xff).put((byte)0xff).put((byte)0xff);
+ bb.position(0);
+ bb.limit(8);
+ BigInteger bi = Unsigned.getUnsignedLong(bb);
+ BigInteger uLongMax = new BigInteger(ULONG_MAX);
+ for (int i = 0; i < uLongMax.bitCount(); ++i) {
+ TestCase.assertTrue("Bit: " + i + " should be: " + uLongMax.testBit(i),
+ uLongMax.testBit(i) == bi.testBit(i));
+ }
+ TestCase.assertEquals(ULONG_MAX, bi.toString());
+
+ bb = ByteBuffer.allocate(10);
+ bb.put((byte)0x00);
+ bb.put((byte)0xff).put((byte)0xff).put((byte)0xff).put((byte)0xff);
+ bb.put((byte)0xff).put((byte)0xff).put((byte)0xff).put((byte)0xff);
+ bb.put((byte)0x00);
+ bb.position(0);
+ bb.limit(10);
+ bi = Unsigned.getUnsignedLong(bb, 1);
+ uLongMax = new BigInteger(ULONG_MAX);
+ for (int i = 0; i < uLongMax.bitCount(); ++i) {
+ TestCase.assertTrue("Bit: " + i + " should be: " + uLongMax.testBit(i),
+ uLongMax.testBit(i) == bi.testBit(i));
+ }
+ TestCase.assertEquals(ULONG_MAX, bi.toString());
+ }
+
+ /**
+ * Tests that we correctly put an unsigned long into a ByteBuffer
+ * @throws Exception
+ */
+ public void testPutUnsignedLong() throws Exception {
+ ByteBuffer bb = ByteBuffer.allocate(8);
+ BigInteger uLongMax = new BigInteger(ULONG_MAX);
+ Unsigned.putUnsignedLong(bb, uLongMax);
+ for (int i = 0; i < 8; ++i) {
+ TestCase.assertTrue("Byte: " + i + " should be 0xff, was: " + bb.get(i),
+ (bb.get(i) & (short)0xff) == 0xff);
+ }
+
+ bb = ByteBuffer.allocate(10);
+ Unsigned.putUnsignedLong(bb, uLongMax, 1);
+ int offset = 1;
+ for (int i = 0; i < 8; ++i) {
+ TestCase.assertTrue("Byte: " + i + " should be 0xff, was: " +
+ bb.get(offset+i), (bb.get(offset+i) & (short)0xff) == 0xff);
+ }
+ }
+}