CharsetDecoderTest.java revision 71684d91a50ae210cec2cb8eccdc632bc494c786
1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package java.nio.charset; 18 19import java.nio.ByteBuffer; 20import java.nio.CharBuffer; 21 22import junit.framework.Test; 23import junit.framework.TestSuite; 24 25public class CharsetDecoderTest extends junit.framework.TestCase { 26 private static final String CHARSET = "UTF-16"; 27 28 private static final String SAMPLE_STRING = "Android"; 29 30 // http://code.google.com/p/android/issues/detail?id=4237 31 public void test_ByteArray_decode_no_offset() throws Exception { 32 CharsetDecoder decoder = getCharsetDecoderUnderTest(); 33 byte[] arr = getEncodedByteArrayFixture(); 34 ByteBuffer inBuffer = ByteBuffer.wrap(arr, 0, arr.length).slice(); 35 CharBuffer outBuffer = CharBuffer.allocate(arr.length); 36 decoder.reset(); 37 CoderResult coderResult = decoder.decode(inBuffer, outBuffer, true); 38 assertFalse(coderResult.toString(), coderResult.isError()); 39 decoder.flush(outBuffer); 40 outBuffer.flip(); 41 assertEquals(SAMPLE_STRING, outBuffer.toString().trim()); 42 } 43 44 // http://code.google.com/p/android/issues/detail?id=4237 45 public void test_ByteArray_decode_with_offset() throws Exception { 46 CharsetDecoder decoder = getCharsetDecoderUnderTest(); 47 byte[] arr = getEncodedByteArrayFixture(); 48 arr = prependByteToByteArray(arr, new Integer(1).byteValue()); 49 int offset = 1; 50 ByteBuffer inBuffer = ByteBuffer.wrap(arr, offset, arr.length - offset).slice(); 51 CharBuffer outBuffer = CharBuffer.allocate(arr.length - offset); 52 decoder.reset(); 53 CoderResult coderResult = decoder.decode(inBuffer, outBuffer, true); 54 assertFalse(coderResult.toString(), coderResult.isError()); 55 decoder.flush(outBuffer); 56 outBuffer.flip(); 57 assertEquals(SAMPLE_STRING, outBuffer.toString().trim()); 58 } 59 60 // http://code.google.com/p/android/issues/detail?id=4237 61 public void test_ByteArray_decode_with_offset_using_facade_method() throws Exception { 62 CharsetDecoder decoder = getCharsetDecoderUnderTest(); 63 byte[] arr = getEncodedByteArrayFixture(); 64 arr = prependByteToByteArray(arr, new Integer(1).byteValue()); 65 int offset = 1; 66 CharBuffer outBuffer = decoder.decode(ByteBuffer.wrap(arr, offset, arr.length - offset)); 67 assertEquals(SAMPLE_STRING, outBuffer.toString().trim()); 68 } 69 70 private static byte[] prependByteToByteArray(byte[] arr, byte b) { 71 byte[] result = new byte[arr.length + 1]; 72 result[0] = b; 73 System.arraycopy(arr, 0, result, 1, arr.length); 74 return result; 75 } 76 77 private static CharsetDecoder getCharsetDecoderUnderTest() { 78 return Charset.forName(CHARSET).newDecoder(); 79 } 80 81 private byte[] getEncodedByteArrayFixture() throws CharacterCodingException { 82 CharsetEncoder encoder = Charset.forName(CHARSET).newEncoder(); 83 return encoder.encode(CharBuffer.wrap(SAMPLE_STRING)).array(); 84 } 85} 86