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.BufferedInputStream; 20import java.io.ByteArrayInputStream; 21import java.io.IOException; 22import java.io.InputStream; 23import junit.framework.Assert; 24import junit.framework.TestCase; 25 26/** 27 * Tests to verify that simple functionality works for BufferedInputStreams. 28 */ 29public class OldAndroidBufferedInputStreamTest extends TestCase { 30 31 public void testBufferedInputStream() throws Exception { 32 String str = "AbCdEfGhIjKlM\nOpQrStUvWxYz"; 33 ByteArrayInputStream aa = new ByteArrayInputStream(str.getBytes()); 34 ByteArrayInputStream ba = new ByteArrayInputStream(str.getBytes()); 35 ByteArrayInputStream ca = new ByteArrayInputStream(str.getBytes()); 36 ByteArrayInputStream da = new ByteArrayInputStream(str.getBytes()); 37 ByteArrayInputStream ea = new ByteArrayInputStream(str.getBytes()); 38 39 BufferedInputStream a = new BufferedInputStream(aa, 6); 40 try { 41 Assert.assertEquals(str, read(a)); 42 } finally { 43 a.close(); 44 } 45 46 BufferedInputStream b = new BufferedInputStream(ba, 7); 47 try { 48 Assert.assertEquals("AbCdEfGhIj", read(b, 10)); 49 } finally { 50 b.close(); 51 } 52 53 BufferedInputStream c = new BufferedInputStream(ca, 9); 54 try { 55 assertEquals("bdfhjl\nprtvxz", skipRead(c)); 56 } finally { 57 c.close(); 58 } 59 60 BufferedInputStream d = new BufferedInputStream(da, 9); 61 try { 62 assertEquals('A', d.read()); 63 d.mark(15); 64 assertEquals('b', d.read()); 65 assertEquals('C', d.read()); 66 d.reset(); 67 assertEquals('b', d.read()); 68 } finally { 69 d.close(); 70 } 71 72 BufferedInputStream e = new BufferedInputStream(ea, 11); 73 try { 74 // test that we can ask for more than is present, and that we'll get 75 // back only what is there. 76 assertEquals(str, read(e, 10000)); 77 } finally { 78 e.close(); 79 } 80 } 81 82 public static String read(InputStream a) throws IOException { 83 int r; 84 StringBuilder builder = new StringBuilder(); 85 do { 86 r = a.read(); 87 if (r != -1) 88 builder.append((char) r); 89 } while (r != -1); 90 return builder.toString(); 91 } 92 93 public static String skipRead(InputStream a) throws IOException { 94 int r; 95 StringBuilder builder = new StringBuilder(); 96 do { 97 a.skip(1); 98 r = a.read(); 99 if (r != -1) 100 builder.append((char) r); 101 } while (r != -1); 102 return builder.toString(); 103 } 104 105 public static String read(InputStream a, int x) throws IOException { 106 byte[] b = new byte[x]; 107 int len = a.read(b, 0, x); 108 if (len < 0) { 109 return ""; 110 } 111 return new String(b, 0, len); 112 } 113} 114