/* * 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)); } }