1/* 2 * Copyright (C) 2008 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 libcore.java.io; 18 19import java.io.CharArrayReader; 20import java.io.IOException; 21import java.io.Reader; 22import junit.framework.Assert; 23import junit.framework.TestCase; 24 25/** 26 * Basic tests for CharArrayReader. 27 */ 28public class OldAndroidCharArrayReaderTest extends TestCase { 29 30 public void testCharArrayReader() throws Exception { 31 String str = "AbCdEfGhIjKlMnOpQrStUvWxYz"; 32 CharArrayReader a = new CharArrayReader(str.toCharArray()); 33 CharArrayReader b = new CharArrayReader(str.toCharArray()); 34 CharArrayReader c = new CharArrayReader(str.toCharArray()); 35 CharArrayReader d = new CharArrayReader(str.toCharArray()); 36 37 Assert.assertEquals(str, read(a)); 38 Assert.assertEquals("AbCdEfGhIj", read(b, 10)); 39 Assert.assertEquals("bdfhjlnprtvxz", skipRead(c)); 40 Assert.assertEquals("AbCdEfGdEfGhIjKlMnOpQrStUvWxYz", markRead(d, 3, 4)); 41 } 42 43 public static String read(Reader a) throws IOException { 44 int r; 45 StringBuilder builder = new StringBuilder(); 46 do { 47 r = a.read(); 48 if (r != -1) 49 builder.append((char) r); 50 } while (r != -1); 51 return builder.toString(); 52 } 53 54 public static String read(Reader a, int x) throws IOException { 55 char[] b = new char[x]; 56 int len = a.read(b, 0, x); 57 if (len < 0) { 58 return ""; 59 } 60 return new String(b, 0, len); 61 } 62 63 public static String skipRead(Reader a) throws IOException { 64 int r; 65 StringBuilder builder = new StringBuilder(); 66 do { 67 a.skip(1); 68 r = a.read(); 69 if (r != -1) 70 builder.append((char) r); 71 } while (r != -1); 72 return builder.toString(); 73 } 74 75 public static String markRead(Reader a, int x, int y) throws IOException { 76 int m = 0; 77 int r; 78 StringBuilder builder = new StringBuilder(); 79 do { 80 m++; 81 r = a.read(); 82 if (m == x) 83 a.mark((x + y)); 84 if (m == (x + y)) 85 a.reset(); 86 87 if (r != -1) 88 builder.append((char) r); 89 } while (r != -1); 90 return builder.toString(); 91 } 92} 93