| /* |
| * Copyright (C) 2008 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.java.io; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.StringReader; |
| import junit.framework.Assert; |
| import junit.framework.TestCase; |
| |
| public class OldAndroidStringReaderTest extends TestCase { |
| |
| public void testStringReader() throws Exception { |
| String str = "AbCdEfGhIjKlMnOpQrStUvWxYz"; |
| |
| StringReader a = new StringReader(str); |
| StringReader b = new StringReader(str); |
| StringReader c = new StringReader(str); |
| StringReader d = new StringReader(str); |
| |
| Assert.assertEquals(str, read(a)); |
| Assert.assertEquals("AbCdEfGhIj", read(b, 10)); |
| Assert.assertEquals("bdfhjlnprtvxz", skipRead(c)); |
| Assert.assertEquals("AbCdEfGdEfGhIjKlMnOpQrStUvWxYz", markRead(d, 3, 4)); |
| } |
| |
| public static String read(Reader a) throws IOException { |
| int r; |
| StringBuilder builder = new StringBuilder(); |
| do { |
| r = a.read(); |
| if (r != -1) |
| builder.append((char) r); |
| } while (r != -1); |
| return builder.toString(); |
| } |
| |
| public static String read(Reader a, int x) throws IOException { |
| char[] b = new char[x]; |
| int len = a.read(b, 0, x); |
| if (len < 0) { |
| return ""; |
| } |
| return new String(b, 0, len); |
| } |
| |
| public static String skipRead(Reader a) throws IOException { |
| int r; |
| StringBuilder builder = new StringBuilder(); |
| do { |
| a.skip(1); |
| r = a.read(); |
| if (r != -1) |
| builder.append((char) r); |
| } while (r != -1); |
| return builder.toString(); |
| } |
| |
| public static String markRead(Reader a, int x, int y) throws IOException { |
| int m = 0; |
| int r; |
| StringBuilder builder = new StringBuilder(); |
| do { |
| m++; |
| r = a.read(); |
| if (m == x) |
| a.mark((x + y)); |
| if (m == (x + y)) |
| a.reset(); |
| |
| if (r != -1) |
| builder.append((char) r); |
| } while (r != -1); |
| return builder.toString(); |
| } |
| } |