1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.io.File; 25 import java.io.FileInputStream; 26 import java.io.FileReader; 27 import java.io.FileWriter; 28 import java.io.IOException; 29 import java.io.InputStreamReader; 30 import java.io.Reader; 31 import java.nio.charset.Charset; 32 import java.nio.charset.StandardCharsets; 33 import org.testng.Assert; 34 import org.testng.annotations.DataProvider; 35 import org.testng.annotations.Test; 36 37 /** 38 * @test 39 * @bug 8183554 40 * @summary Test to verify the new Constructors that take a Charset. 41 * @run testng ConstructorTest 42 */ 43 public class ConstructorTest { 44 static String USER_DIR = System.getProperty("user.dir", "."); 45 46 public static enum ConstructorType { 47 STRING, 48 FILE 49 } 50 51 static final String TEST_STRING = "abc \u0100 \u0101 \u0555 \u07FD \u07FF"; 52 static final int BUFFER_SIZE = 8192; 53 54 @DataProvider(name = "parameters") 55 public Object[][] getParameters() throws IOException { 56 File file1 = new File(USER_DIR, "FileReaderTest1.txt"); 57 File file2 = new File(USER_DIR, "FileReaderTest2.txt"); 58 59 return new Object[][]{ 60 {ConstructorType.STRING, file1, file2, StandardCharsets.UTF_8}, 61 {ConstructorType.FILE, file1, file2, StandardCharsets.UTF_8}, 62 {ConstructorType.STRING, file1, file2, StandardCharsets.ISO_8859_1}, 63 {ConstructorType.FILE, file1, file2, StandardCharsets.ISO_8859_1}, 64 }; 65 } 66 67 /** 68 * Verifies that the new constructors that take a Charset function the same 69 * as an InputStreamReader on a FileInputStream as was recommended before 70 * this change. 71 * 72 * @param type the type of the constructor 73 * @param file1 file1 to be read with a FileReader 74 * @param file2 file2 to be read with an InputStreamReader 75 * @param charset the charset 76 * @throws IOException 77 */ 78 @Test(dataProvider = "parameters") 79 void test(ConstructorType type, File file1, File file2, Charset charset) 80 throws Exception { 81 prepareFile(file1, TEST_STRING, charset); 82 prepareFile(file2, TEST_STRING, charset); 83 84 try (FileReader fr = getFileReader(type, file1, charset); 85 FileInputStream is = new FileInputStream(file2); 86 InputStreamReader isr = new InputStreamReader(is, charset);) { 87 String result1 = readAll(fr, BUFFER_SIZE); 88 String result2 = readAll(isr, BUFFER_SIZE); 89 Assert.assertEquals(result1, result2); 90 } 91 } 92 93 public String readAll(Reader reader, int bufferSize) throws IOException { 94 StringBuilder sb = new StringBuilder(); 95 char[] buf = new char[bufferSize]; 96 int numRead; 97 while ((numRead = reader.read(buf)) != -1) { 98 if (numRead == buf.length) { 99 sb.append(buf); 100 } else { 101 sb.append(String.valueOf(buf, 0, numRead)); 102 } 103 } 104 return sb.toString(); 105 } 106 107 /* 108 * Creates a FileReader over the given input file. 109 */ 110 FileReader getFileReader(ConstructorType type, File file, Charset charset) 111 throws IOException { 112 switch (type) { 113 case STRING: 114 return new FileReader(file.getPath(), charset); 115 case FILE: 116 return new FileReader(file, charset); 117 } 118 119 return null; 120 } 121 122 void prepareFile(File file, String content, Charset charset) throws IOException { 123 try (FileWriter writer = new FileWriter(file, charset);) { 124 writer.write(content); 125 } 126 } 127 }