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/*
* Copyright 2007 - 2018 ETH Zuerich, CISD and SIS.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ch.systemsx.cisd.hdf5;
import static org.testng.AssertJUnit.assertEquals;
import static org.testng.AssertJUnit.assertTrue;
import java.math.BigInteger;
import org.testng.annotations.Test;
import ch.systemsx.cisd.base.convert.NativeData;
import ch.systemsx.cisd.base.convert.NativeData.ByteOrder;
/**
* Test cases for{@link UnsignedIntUtils}.
*
* @author Bernd Rinn
*/
public class UnsignedIntUtilsTest
{
@Test
public void testToInt64()
{
final BigInteger veryLarge = new BigInteger("2").pow(64).subtract(new BigInteger("100"));
final long int64 = UnsignedIntUtils.toInt64(veryLarge);
assertTrue(int64 < 0);
final BigInteger veryLarge2 = new BigInteger(1, NativeData.longToByte(new long[]
{ int64 }, ByteOrder.BIG_ENDIAN));
assertEquals(veryLarge, veryLarge2);
}
@Test(expectedExceptions = IllegalArgumentException.class)
public void testToInt64_Overflow()
{
final BigInteger tooLarge = new BigInteger("2").pow(64);
UnsignedIntUtils.toInt64(tooLarge);
}
@Test
public void testToUint32()
{
final long veryLarge = (1L << 32L) - 17;
final int veryLargeInt = UnsignedIntUtils.toInt32(veryLarge);
assertTrue(veryLargeInt < 0);
assertEquals(veryLarge, UnsignedIntUtils.toUint32(veryLargeInt));
}
@Test
public void testToUint16()
{
final int veryLarge = 40000;
final short veryLargeShort = UnsignedIntUtils.toInt16(veryLarge);
assertTrue(veryLargeShort < 0);
assertEquals(veryLarge, UnsignedIntUtils.toUint16(veryLargeShort));
}
@Test
public void testToUint8()
{
final short veryLarge = 199;
final byte veryLargeByte = UnsignedIntUtils.toInt8(veryLarge);
assertTrue(veryLargeByte < 0);
assertEquals(veryLarge, UnsignedIntUtils.toUint8(veryLargeByte));
}
}
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