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.FileOutputStream;
27 import java.io.FileReader;
28 import java.io.FileWriter;
29 import java.io.IOException;
30 import java.io.OutputStreamWriter;
31 import java.io.Reader;
32 import java.nio.charset.Charset;
33 import java.nio.charset.StandardCharsets;
34 import org.testng.Assert;
35 import org.testng.annotations.DataProvider;
36 import org.testng.annotations.Test;
37
38 /**
39 * @test
40 * @bug 8183554
41 * @summary Test to verify the new Constructors that take a Charset.
42 * @run testng ConstructorTest
43 */
44 public class ConstructorTest {
45 static String USER_DIR = System.getProperty("user.dir", ".");
46
47 public static enum ConstructorType {
48 STRING,
49 FILE,
50 STRING_APPEND,
51 FILE_APPEND
52 }
53
54 static final String TEST_STRING = "abc \u0100 \u0101 \u0555 \u07FD \u07FF";
55 static final int BUFFER_SIZE = 8192;
56
57 @DataProvider(name = "parameters")
58 public Object[][] getParameters() throws IOException {
59 File file1 = new File(USER_DIR, "FileWriterTest1.txt");
60 File file2 = new File(USER_DIR, "FileWriterTest2.txt");
61
62 return new Object[][]{
63 {ConstructorType.STRING, file1, file2, StandardCharsets.UTF_8},
64 {ConstructorType.FILE, file1, file2, StandardCharsets.UTF_8},
65 {ConstructorType.STRING_APPEND, file1, file2, StandardCharsets.UTF_8},
66 {ConstructorType.FILE_APPEND, file1, file2, StandardCharsets.UTF_8},
67 {ConstructorType.STRING, file1, file2, StandardCharsets.ISO_8859_1},
68 {ConstructorType.FILE, file1, file2, StandardCharsets.ISO_8859_1},
69 {ConstructorType.STRING_APPEND, file1, file2, StandardCharsets.ISO_8859_1},
70 {ConstructorType.FILE_APPEND, file1, file2, StandardCharsets.ISO_8859_1},
71 };
72 }
73
74 /**
75 * Verifies that the new constructors that take a Charset function the same
76 * as an OutputStreamWriter on a FileOutputStream as was recommended before
77 * this change.
78 *
79 * @param type the type of the constructor
80 * @param file1 file1 to be written with a FileWriter
81 * @param file2 file2 to be written with an OutputStreamWriter
82 * @param charset the charset
83 * @throws IOException
84 */
85 @Test(dataProvider = "parameters")
86 void test(ConstructorType type, File file1, File file2, Charset charset)
87 throws Exception {
88 writeWithFileWriter(type, file1, TEST_STRING, charset);
89 writeWithOutputStreamWriter(type, file2, TEST_STRING, charset);
90
91 try (
92 FileReader r1 = getFileReader(type, file1, charset);
93 FileReader r2 = getFileReader(type, file2, charset);
94 ) {
95 String result1 = readAll(r1, BUFFER_SIZE);
96 String result2 = readAll(r2, BUFFER_SIZE);
97 Assert.assertEquals(result1, result2);
98 }
99 }
100
101 public String readAll(Reader reader, int bufferSize) throws IOException {
102 StringBuilder sb = new StringBuilder();
103 char[] buf = new char[bufferSize];
104 int numRead;
105 while ((numRead = reader.read(buf)) != -1) {
106 if (numRead == buf.length) {
107 sb.append(buf);
108 } else {
109 sb.append(String.valueOf(buf, 0, numRead));
110 }
111 }
112 return sb.toString();
113 }
114
115 /*
116 * Creates a FileReader over the given input file.
117 */
118 FileReader getFileReader(ConstructorType type, File file, Charset charset)
119 throws IOException {
120 switch (type) {
121 case STRING:
122 case STRING_APPEND:
123 return new FileReader(file.getPath(), charset);
124 case FILE:
125 case FILE_APPEND:
126 return new FileReader(file, charset);
127 }
128
129 return null;
130 }
131
132 /*
133 * Creates a FileWriter using the constructor as specified.
134 */
135 FileWriter getFileWriter(ConstructorType type, File file, Charset charset)
136 throws IOException {
137 switch (type) {
138 case STRING:
139 return new FileWriter(file.getPath(), charset);
140 case FILE:
141 return new FileWriter(file, charset);
142 case STRING_APPEND:
143 return new FileWriter(file.getPath(), charset, true);
144 case FILE_APPEND:
145 return new FileWriter(file, charset, true);
146 }
147
148 return null;
149 }
150
151 void writeWithFileWriter(ConstructorType type, File file, String content, Charset charset)
152 throws IOException {
153 if (type == ConstructorType.STRING_APPEND || type == ConstructorType.FILE_APPEND) {
154 try (FileWriter writer = getFileWriter(ConstructorType.FILE, file, charset);) {
155 writer.write(content);
156 }
157 }
158 try (FileWriter writer = getFileWriter(type, file, charset);) {
159 writer.write(content);
160 }
161 }
162
163 void writeWithOutputStreamWriter(ConstructorType type, File file, String content, Charset charset)
164 throws IOException {
165 try (OutputStreamWriter writer = new OutputStreamWriter(new FileOutputStream(file), charset)) {
166 writer.write(content);
167 if (type == ConstructorType.STRING_APPEND || type == ConstructorType.FILE_APPEND) {
168 writer.write(content);
169 }
170 }
171 }
172 }