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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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 libcore.util;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import junit.framework.TestCase;
import static libcore.util.HexEncoding.decode;
import static libcore.util.HexEncoding.encode;
public class HexEncodingTest extends TestCase {
public void testEncode() {
final byte[] avocados = "avocados".getBytes(StandardCharsets.UTF_8);
assertArraysEqual("61766F6361646F73".toCharArray(), encode(avocados));
assertArraysEqual(avocados, decode(encode(avocados), false));
// Make sure we can handle lower case hex encodings as well.
assertArraysEqual(avocados, decode("61766f6361646f73".toCharArray(), false));
}
public void testDecode_allow4Bit() {
assertArraysEqual(new byte[] { 6 }, decode("6".toCharArray(), true));
assertArraysEqual(new byte[] { 6, 'v' }, decode("676".toCharArray(), true));
}
public void testDecode_disallow4Bit() {
try {
decode("676".toCharArray(), false);
fail();
} catch (IllegalArgumentException expected) {
}
}
public void testDecode_invalid() {
try {
decode("DEADBARD".toCharArray(), false);
fail();
} catch (IllegalArgumentException expected) {
}
// This demonstrates a difference in behaviour from apache commons : apache
// commons uses Character.isDigit and would successfully decode a string with
// arabic and devanagari characters.
try {
decode("६१٧٥٥F6361646F73".toCharArray(), false);
fail();
} catch (IllegalArgumentException expected) {
}
try {
decode("#%6361646F73".toCharArray(), false);
fail();
} catch (IllegalArgumentException expected) {
}
}
private static void assertArraysEqual(char[] lhs, char[] rhs) {
assertEquals(new String(lhs), new String(rhs));
}
private static void assertArraysEqual(byte[] lhs, byte[] rhs) {
assertEquals(Arrays.toString(lhs), Arrays.toString(rhs));
}
}
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