/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cassandra.utils;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.charset.CharacterCodingException;
import java.util.Arrays;
import com.google.common.base.Charsets;
import org.junit.Test;
public class FBUtilitiesTest
{
@Test
public void testHexBytesConversion()
{
for (int i = Byte.MIN_VALUE; i <= Byte.MAX_VALUE; i++)
{
byte[] b = new byte[]{ (byte)i };
String s = FBUtilities.bytesToHex(b);
byte[] c = FBUtilities.hexToBytes(s);
assertArrayEquals(b, c);
}
}
@Test
public void testHexToBytesStringConversion()
{
String[] values = new String[]
{
"0",
"10",
"100",
"101",
"f",
"ff"
};
byte[][] expected = new byte[][]
{
new byte[] { 0x00 },
new byte[] { 0x10 },
new byte[] { 0x01, 0x00 },
new byte[] { 0x01, 0x01 },
new byte[] { 0x0f },
new byte[] { (byte)0x000000ff }
};
for (int i = 0; i < values.length; i++)
assert Arrays.equals(FBUtilities.hexToBytes(values[i]), expected[i]);
}
@Test
public void testCopyIntoBytes()
{
int i = 300;
long l = 1000;
ByteBuffer b = ByteBuffer.allocate(20);
FBUtilities.copyIntoBytes(b.array(), 0, i);
FBUtilities.copyIntoBytes(b.array(), 4, l);
assertEquals(i, b.getInt(0));
assertEquals(l, b.getLong(4));
}
@Test
public void testCompareByteSubArrays()
{
ByteBuffer bytes = ByteBuffer.allocate(16);
// handle null
assert ByteBufferUtil.compareSubArrays(
null, 0, null, 0, 0) == 0;
assert ByteBufferUtil.compareSubArrays(
null, 0, ByteBufferUtil.bytes(524255231), 0, 4) == -1;
assert ByteBufferUtil.compareSubArrays(
ByteBufferUtil.bytes(524255231), 0, null, 0, 4) == 1;
// handle comparisons
FBUtilities.copyIntoBytes(bytes.array(), 3, 524255231);
assert ByteBufferUtil.compareSubArrays(
bytes, 3, ByteBufferUtil.bytes(524255231), 0, 4) == 0;
assert ByteBufferUtil.compareSubArrays(
bytes, 3, ByteBufferUtil.bytes(524255232), 0, 4) == -1;
assert ByteBufferUtil.compareSubArrays(
bytes, 3, ByteBufferUtil.bytes(524255230), 0, 4) == 1;
// check that incorrect length throws exception
try
{
assert ByteBufferUtil.compareSubArrays(
bytes, 3, ByteBufferUtil.bytes(524255231), 0, 24) == 0;
fail("Should raise an AssertionError.");
} catch (AssertionError ae)
{
}
try
{
assert ByteBufferUtil.compareSubArrays(
bytes, 3, ByteBufferUtil.bytes(524255231), 0, 12) == 0;
fail("Should raise an AssertionError.");
} catch (AssertionError ae)
{
}
}
@Test(expected=CharacterCodingException.class)
public void testDecode() throws IOException
{
ByteBuffer bytes = ByteBuffer.wrap(new byte[]{(byte)0xff, (byte)0xfe});
ByteBufferUtil.string(bytes, Charsets.UTF_8);
}
}