| /* |
| * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileReader; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.Reader; |
| import java.nio.charset.Charset; |
| import java.nio.charset.StandardCharsets; |
| import org.testng.Assert; |
| import org.testng.annotations.DataProvider; |
| import org.testng.annotations.Test; |
| |
| /** |
| * @test |
| * @bug 8183554 |
| * @summary Test to verify the new Constructors that take a Charset. |
| * @run testng ConstructorTest |
| */ |
| public class ConstructorTest { |
| static String USER_DIR = System.getProperty("user.dir", "."); |
| |
| public static enum ConstructorType { |
| STRING, |
| FILE |
| } |
| |
| static final String TEST_STRING = "abc \u0100 \u0101 \u0555 \u07FD \u07FF"; |
| static final int BUFFER_SIZE = 8192; |
| |
| @DataProvider(name = "parameters") |
| public Object[][] getParameters() throws IOException { |
| File file1 = new File(USER_DIR, "FileReaderTest1.txt"); |
| File file2 = new File(USER_DIR, "FileReaderTest2.txt"); |
| |
| return new Object[][]{ |
| {ConstructorType.STRING, file1, file2, StandardCharsets.UTF_8}, |
| {ConstructorType.FILE, file1, file2, StandardCharsets.UTF_8}, |
| {ConstructorType.STRING, file1, file2, StandardCharsets.ISO_8859_1}, |
| {ConstructorType.FILE, file1, file2, StandardCharsets.ISO_8859_1}, |
| }; |
| } |
| |
| /** |
| * Verifies that the new constructors that take a Charset function the same |
| * as an InputStreamReader on a FileInputStream as was recommended before |
| * this change. |
| * |
| * @param type the type of the constructor |
| * @param file1 file1 to be read with a FileReader |
| * @param file2 file2 to be read with an InputStreamReader |
| * @param charset the charset |
| * @throws IOException |
| */ |
| @Test(dataProvider = "parameters") |
| void test(ConstructorType type, File file1, File file2, Charset charset) |
| throws Exception { |
| prepareFile(file1, TEST_STRING, charset); |
| prepareFile(file2, TEST_STRING, charset); |
| |
| try (FileReader fr = getFileReader(type, file1, charset); |
| FileInputStream is = new FileInputStream(file2); |
| InputStreamReader isr = new InputStreamReader(is, charset);) { |
| String result1 = readAll(fr, BUFFER_SIZE); |
| String result2 = readAll(isr, BUFFER_SIZE); |
| Assert.assertEquals(result1, result2); |
| } |
| } |
| |
| public String readAll(Reader reader, int bufferSize) throws IOException { |
| StringBuilder sb = new StringBuilder(); |
| char[] buf = new char[bufferSize]; |
| int numRead; |
| while ((numRead = reader.read(buf)) != -1) { |
| if (numRead == buf.length) { |
| sb.append(buf); |
| } else { |
| sb.append(String.valueOf(buf, 0, numRead)); |
| } |
| } |
| return sb.toString(); |
| } |
| |
| /* |
| * Creates a FileReader over the given input file. |
| */ |
| FileReader getFileReader(ConstructorType type, File file, Charset charset) |
| throws IOException { |
| switch (type) { |
| case STRING: |
| return new FileReader(file.getPath(), charset); |
| case FILE: |
| return new FileReader(file, charset); |
| } |
| |
| return null; |
| } |
| |
| void prepareFile(File file, String content, Charset charset) throws IOException { |
| try (FileWriter writer = new FileWriter(file, charset);) { |
| writer.write(content); |
| } |
| } |
| } |