/*
* 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.codec.binary;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.nio.charset.UnsupportedCharsetException;
import java.util.Arrays;
import java.util.Random;
import org.junit.Assert;
import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.EncoderException;
import org.junit.Test;
/**
* Tests {@link org.apache.commons.codec.binary.Hex}.
*
* @version $Id: HexTest.java 1437501 2013-01-23 15:51:21Z ggregory $
*/
public class HexTest {
private static final String BAD_ENCODING_NAME = "UNKNOWN";
private final static boolean LOG = false;
private boolean charsetSanityCheck(final String name) {
final String source = "the quick brown dog jumped over the lazy fox";
try {
final byte[] bytes = source.getBytes(name);
final String str = new String(bytes, name);
final boolean equals = source.equals(str);
if (equals == false) {
// Here with:
//
// Java Sun 1.4.2_19 x86 32-bits on Windows XP
// JIS_X0212-1990
// x-JIS0208
//
// Java Sun 1.5.0_17 x86 32-bits on Windows XP
// JIS_X0212-1990
// x-IBM834
// x-JIS0208
// x-MacDingbat
// x-MacSymbol
//
// Java Sun 1.6.0_14 x86 32-bits
// JIS_X0212-1990
// x-IBM834
// x-JIS0208
// x-MacDingbat
// x-MacSymbol
//
log("FAILED charsetSanityCheck=Interesting Java charset oddity: Roundtrip failed for " + name);
}
return equals;
} catch (final UnsupportedEncodingException e) {
// Should NEVER happen since we are getting the name from the Charset class.
if (LOG) {
log("FAILED charsetSanityCheck=" + name + ", e=" + e);
log(e);
}
return false;
} catch (final UnsupportedOperationException e) {
// Caught here with:
// x-JISAutoDetect on Windows XP and Java Sun 1.4.2_19 x86 32-bits
// x-JISAutoDetect on Windows XP and Java Sun 1.5.0_17 x86 32-bits
// x-JISAutoDetect on Windows XP and Java Sun 1.6.0_14 x86 32-bits
if (LOG) {
log("FAILED charsetSanityCheck=" + name + ", e=" + e);
log(e);
}
return false;
}
}
/**
* @param data
*/
private void checkDecodeHexOddCharacters(final char[] data) {
try {
Hex.decodeHex(data);
fail("An exception wasn't thrown when trying to decode an odd number of characters");
} catch (final DecoderException e) {
// Expected exception
}
}
private void log(final String s) {
if (LOG) {
System.out.println(s);
System.out.flush();
}
}
private void log(final Throwable t) {
if (LOG) {
t.printStackTrace(System.out);
System.out.flush();
}
}
@Test
public void testCustomCharset() throws UnsupportedEncodingException, DecoderException {
for (final String name : Charset.availableCharsets().keySet()) {
testCustomCharset(name, "testCustomCharset");
}
}
/**
* @param name
* @param parent
* TODO
* @throws UnsupportedEncodingException
* @throws DecoderException
*/
private void testCustomCharset(final String name, final String parent) throws UnsupportedEncodingException, DecoderException {
if (charsetSanityCheck(name) == false) {
return;
}
log(parent + "=" + name);
final Hex customCodec = new Hex(name);
// source data
final String sourceString = "Hello World";
final byte[] sourceBytes = sourceString.getBytes(name);
// test 1
// encode source to hex string to bytes with charset
final byte[] actualEncodedBytes = customCodec.encode(sourceBytes);
// encode source to hex string...
String expectedHexString = Hex.encodeHexString(sourceBytes);
// ... and get the bytes in the expected charset
final byte[] expectedHexStringBytes = expectedHexString.getBytes(name);
Assert.assertTrue(Arrays.equals(expectedHexStringBytes, actualEncodedBytes));
// test 2
String actualStringFromBytes = new String(actualEncodedBytes, name);
assertEquals(name + ", expectedHexString=" + expectedHexString + ", actualStringFromBytes=" + actualStringFromBytes,
expectedHexString, actualStringFromBytes);
// second test:
final Hex utf8Codec = new Hex();
expectedHexString = "48656c6c6f20576f726c64";
final byte[] decodedUtf8Bytes = (byte[]) utf8Codec.decode(expectedHexString);
actualStringFromBytes = new String(decodedUtf8Bytes, utf8Codec.getCharset());
// sanity check:
assertEquals(name, sourceString, actualStringFromBytes);
// actual check:
final byte[] decodedCustomBytes = customCodec.decode(actualEncodedBytes);
actualStringFromBytes = new String(decodedCustomBytes, name);
assertEquals(name, sourceString, actualStringFromBytes);
}
@Test(expected=UnsupportedCharsetException.class)
public void testCustomCharsetBadName() {
new Hex(BAD_ENCODING_NAME);
}
@Test
public void testCustomCharsetToString() {
assertTrue(new Hex().toString().indexOf(Hex.DEFAULT_CHARSET_NAME) >= 0);
}
@Test
public void testDecodeArrayOddCharacters() {
try {
new Hex().decode(new byte[]{65});
fail("An exception wasn't thrown when trying to decode an odd number of characters");
} catch (final DecoderException e) {
// Expected exception
}
}
@Test
public void testDecodeBadCharacterPos0() {
try {
new Hex().decode("q0");
fail("An exception wasn't thrown when trying to decode an illegal character");
} catch (final DecoderException e) {
// Expected exception
}
}
@Test
public void testDecodeBadCharacterPos1() {
try {
new Hex().decode("0q");
fail("An exception wasn't thrown when trying to decode an illegal character");
} catch (final DecoderException e) {
// Expected exception
}
}
@Test
public void testDecodeClassCastException() {
try {
new Hex().decode(new int[]{65});
fail("An exception wasn't thrown when trying to decode.");
} catch (final DecoderException e) {
// Expected exception
}
}
@Test
public void testDecodeHexOddCharacters1() {
checkDecodeHexOddCharacters(new char[]{'A'});
}
@Test
public void testDecodeHexOddCharacters3() {
checkDecodeHexOddCharacters(new char[]{'A', 'B', 'C'});
}
@Test
public void testDecodeHexOddCharacters5() {
checkDecodeHexOddCharacters(new char[]{'A', 'B', 'C', 'D', 'E'});
}
@Test
public void testDecodeStringOddCharacters() {
try {
new Hex().decode("6");
fail("An exception wasn't thrown when trying to decode an odd number of characters");
} catch (final DecoderException e) {
// Expected exception
}
}
@Test
public void testDencodeEmpty() throws DecoderException {
assertTrue(Arrays.equals(new byte[0], Hex.decodeHex(new char[0])));
assertTrue(Arrays.equals(new byte[0], new Hex().decode(new byte[0])));
assertTrue(Arrays.equals(new byte[0], (byte[]) new Hex().decode("")));
}
@Test
public void testEncodeClassCastException() {
try {
new Hex().encode(new int[]{65});
fail("An exception wasn't thrown when trying to encode.");
} catch (final EncoderException e) {
// Expected exception
}
}
@Test
public void testEncodeDecodeRandom() throws DecoderException, EncoderException {
final Random random = new Random();
final Hex hex = new Hex();
for (int i = 5; i > 0; i--) {
final byte[] data = new byte[random.nextInt(10000) + 1];
random.nextBytes(data);
// static API
final char[] encodedChars = Hex.encodeHex(data);
byte[] decodedBytes = Hex.decodeHex(encodedChars);
assertTrue(Arrays.equals(data, decodedBytes));
// instance API with array parameter
final byte[] encodedStringBytes = hex.encode(data);
decodedBytes = hex.decode(encodedStringBytes);
assertTrue(Arrays.equals(data, decodedBytes));
// instance API with char[] (Object) parameter
String dataString = new String(encodedChars);
char[] encodedStringChars = (char[]) hex.encode(dataString);
decodedBytes = (byte[]) hex.decode(encodedStringChars);
assertTrue(Arrays.equals(StringUtils.getBytesUtf8(dataString), decodedBytes));
// instance API with String (Object) parameter
dataString = new String(encodedChars);
encodedStringChars = (char[]) hex.encode(dataString);
decodedBytes = (byte[]) hex.decode(new String(encodedStringChars));
assertTrue(Arrays.equals(StringUtils.getBytesUtf8(dataString), decodedBytes));
}
}
@Test
public void testEncodeEmpty() throws EncoderException {
assertTrue(Arrays.equals(new char[0], Hex.encodeHex(new byte[0])));
assertTrue(Arrays.equals(new byte[0], new Hex().encode(new byte[0])));
assertTrue(Arrays.equals(new char[0], (char[]) new Hex().encode("")));
}
@Test
public void testEncodeZeroes() {
final char[] c = Hex.encodeHex(new byte[36]);
assertEquals("000000000000000000000000000000000000000000000000000000000000000000000000", new String(c));
}
@Test
public void testHelloWorldLowerCaseHex() {
final byte[] b = StringUtils.getBytesUtf8("Hello World");
final String expected = "48656c6c6f20576f726c64";
char[] actual;
actual = Hex.encodeHex(b);
assertEquals(expected, new String(actual));
actual = Hex.encodeHex(b, true);
assertEquals(expected, new String(actual));
actual = Hex.encodeHex(b, false);
assertFalse(expected.equals(new String(actual)));
}
@Test
public void testHelloWorldUpperCaseHex() {
final byte[] b = StringUtils.getBytesUtf8("Hello World");
final String expected = "48656C6C6F20576F726C64";
char[] actual;
actual = Hex.encodeHex(b);
assertFalse(expected.equals(new String(actual)));
actual = Hex.encodeHex(b, true);
assertFalse(expected.equals(new String(actual)));
actual = Hex.encodeHex(b, false);
assertTrue(expected.equals(new String(actual)));
}
@Test
public void testRequiredCharset() throws UnsupportedEncodingException, DecoderException {
testCustomCharset("UTF-8", "testRequiredCharset");
testCustomCharset("UTF-16", "testRequiredCharset");
testCustomCharset("UTF-16BE", "testRequiredCharset");
testCustomCharset("UTF-16LE", "testRequiredCharset");
testCustomCharset("US-ASCII", "testRequiredCharset");
testCustomCharset("ISO8859_1", "testRequiredCharset");
}
}