/*
* 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.commons.io;
import java.io.IOException;
import junit.framework.TestCase;
import org.apache.commons.io.output.ByteArrayOutputStream;
/**
* @author Scott Sanders (sanders at apache dot org)
* @author Marc Johnson (mjohnson at apache dot org)
* @version $Revision: 606381 $ $Date: 2007-12-22 02:03:16 +0000 (Sat, 22 Dec 2007) $
*/
public class HexDumpTest extends TestCase {
/**
* Creates new HexDumpTest
*
* @param name
*/
public HexDumpTest(String name) {
super(name);
}
private char toHex(int n) {
char[] hexChars =
{
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
};
return hexChars[n % 16];
}
/**
* test dump method
*
* @exception IOException
*/
public void testDump()
throws IOException {
byte[] testArray = new byte[256];
for (int j = 0; j < 256; j++) {
testArray[j] = (byte) j;
}
ByteArrayOutputStream stream = new ByteArrayOutputStream();
HexDump.dump(testArray, 0, stream, 0);
byte[] outputArray = new byte[16 * (73 + HexDump.EOL.length())];
for (int j = 0; j < 16; j++) {
int offset = (73 + HexDump.EOL.length()) * j;
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) toHex(j);
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) ' ';
for (int k = 0; k < 16; k++) {
outputArray[offset++] = (byte) toHex(j);
outputArray[offset++] = (byte) toHex(k);
outputArray[offset++] = (byte) ' ';
}
for (int k = 0; k < 16; k++) {
outputArray[offset++] = (byte) toAscii((j * 16) + k);
}
System.arraycopy(HexDump.EOL.getBytes(), 0, outputArray, offset,
HexDump.EOL.getBytes().length);
}
byte[] actualOutput = stream.toByteArray();
assertEquals("array size mismatch", outputArray.length,
actualOutput.length);
for (int j = 0; j < outputArray.length; j++) {
assertEquals("array[ " + j + "] mismatch", outputArray[j],
actualOutput[j]);
}
// verify proper behavior with non-zero offset
stream = new ByteArrayOutputStream();
HexDump.dump(testArray, 0x10000000, stream, 0);
outputArray = new byte[16 * (73 + HexDump.EOL.length())];
for (int j = 0; j < 16; j++) {
int offset = (73 + HexDump.EOL.length()) * j;
outputArray[offset++] = (byte) '1';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) toHex(j);
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) ' ';
for (int k = 0; k < 16; k++) {
outputArray[offset++] = (byte) toHex(j);
outputArray[offset++] = (byte) toHex(k);
outputArray[offset++] = (byte) ' ';
}
for (int k = 0; k < 16; k++) {
outputArray[offset++] = (byte) toAscii((j * 16) + k);
}
System.arraycopy(HexDump.EOL.getBytes(), 0, outputArray, offset,
HexDump.EOL.getBytes().length);
}
actualOutput = stream.toByteArray();
assertEquals("array size mismatch", outputArray.length,
actualOutput.length);
for (int j = 0; j < outputArray.length; j++) {
assertEquals("array[ " + j + "] mismatch", outputArray[j],
actualOutput[j]);
}
// verify proper behavior with negative offset
stream = new ByteArrayOutputStream();
HexDump.dump(testArray, 0xFF000000, stream, 0);
outputArray = new byte[16 * (73 + HexDump.EOL.length())];
for (int j = 0; j < 16; j++) {
int offset = (73 + HexDump.EOL.length()) * j;
outputArray[offset++] = (byte) 'F';
outputArray[offset++] = (byte) 'F';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) toHex(j);
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) ' ';
for (int k = 0; k < 16; k++) {
outputArray[offset++] = (byte) toHex(j);
outputArray[offset++] = (byte) toHex(k);
outputArray[offset++] = (byte) ' ';
}
for (int k = 0; k < 16; k++) {
outputArray[offset++] = (byte) toAscii((j * 16) + k);
}
System.arraycopy(HexDump.EOL.getBytes(), 0, outputArray, offset,
HexDump.EOL.getBytes().length);
}
actualOutput = stream.toByteArray();
assertEquals("array size mismatch", outputArray.length,
actualOutput.length);
for (int j = 0; j < outputArray.length; j++) {
assertEquals("array[ " + j + "] mismatch", outputArray[j],
actualOutput[j]);
}
// verify proper behavior with non-zero index
stream = new ByteArrayOutputStream();
HexDump.dump(testArray, 0x10000000, stream, 0x81);
outputArray = new byte[(8 * (73 + HexDump.EOL.length())) - 1];
for (int j = 0; j < 8; j++) {
int offset = (73 + HexDump.EOL.length()) * j;
outputArray[offset++] = (byte) '1';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) '0';
outputArray[offset++] = (byte) toHex(j + 8);
outputArray[offset++] = (byte) '1';
outputArray[offset++] = (byte) ' ';
for (int k = 0; k < 16; k++) {
int index = 0x81 + (j * 16) + k;
if (index < 0x100) {
outputArray[offset++] = (byte) toHex(index / 16);
outputArray[offset++] = (byte) toHex(index);
} else {
outputArray[offset++] = (byte) ' ';
outputArray[offset++] = (byte) ' ';
}
outputArray[offset++] = (byte) ' ';
}
for (int k = 0; k < 16; k++) {
int index = 0x81 + (j * 16) + k;
if (index < 0x100) {
outputArray[offset++] = (byte) toAscii(index);
}
}
System.arraycopy(HexDump.EOL.getBytes(), 0, outputArray, offset,
HexDump.EOL.getBytes().length);
}
actualOutput = stream.toByteArray();
assertEquals("array size mismatch", outputArray.length,
actualOutput.length);
for (int j = 0; j < outputArray.length; j++) {
assertEquals("array[ " + j + "] mismatch", outputArray[j],
actualOutput[j]);
}
// verify proper behavior with negative index
try {
HexDump.dump(testArray, 0x10000000, new ByteArrayOutputStream(),
-1);
fail("should have caught ArrayIndexOutOfBoundsException on negative index");
} catch (ArrayIndexOutOfBoundsException ignored_exception) {
// as expected
}
// verify proper behavior with index that is too large
try {
HexDump.dump(testArray, 0x10000000, new ByteArrayOutputStream(),
testArray.length);
fail("should have caught ArrayIndexOutOfBoundsException on large index");
} catch (ArrayIndexOutOfBoundsException ignored_exception) {
// as expected
}
// verify proper behavior with null stream
try {
HexDump.dump(testArray, 0x10000000, null, 0);
fail("should have caught IllegalArgumentException on negative index");
} catch (IllegalArgumentException ignored_exception) {
// as expected
}
}
private char toAscii(int c) {
char rval = '.';
if ((c >= 32) && (c <= 126)) {
rval = (char) c;
}
return rval;
}
/**
* main method to run the unit tests
*
* @param ignored_args
*/
public static void main(String[] ignored_args) {
System.out.println("Testing io.HexDump functionality");
junit.textui.TestRunner.run(HexDumpTest.class);
}
}