1 /*
   2  * Copyright (c) 2017, 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.FileWriter;
  27 import java.io.IOException;
  28 import java.nio.charset.Charset;
  29 import java.nio.charset.StandardCharsets;
  30 import java.nio.file.Paths;
  31 import java.util.Scanner;
  32 import org.testng.Assert;
  33 import org.testng.annotations.DataProvider;
  34 import org.testng.annotations.Test;
  35 
  36 /**
  37  * @test
  38  * @bug 8183743
  39  * @summary Test to verify the new overload method with Charset functions the
  40  * same as the existing method that takes a charset name.
  41  * @run testng EncodingTest
  42  */
  43 public class EncodingTest {
  44     static String USER_DIR = System.getProperty("user.dir", ".");
  45 
  46     public static enum ConstructorType {
  47         FILE,
  48         PATH,
  49         INPUTSTREAM,
  50         READABLEBYTECHANNEL
  51     }
  52 
  53     static final String TEST_STRING = "abc \u0100 \u0101 \u0555 \u07FD \u07FF";
  54 
  55     @DataProvider(name = "parameters")
  56     public Object[][] getParameters() throws IOException {
  57         String csn = StandardCharsets.UTF_8.name();
  58         Charset charset = StandardCharsets.UTF_8;
  59         File file1 = new File(USER_DIR, "ScannerCharsetTest1.txt");
  60         File file2 = new File(USER_DIR, "ScannerCharsetTest2.txt");
  61 
  62         return new Object[][]{
  63             {ConstructorType.FILE, file1, file2, csn, charset},
  64             {ConstructorType.PATH, file1, file2, csn, charset},
  65             {ConstructorType.INPUTSTREAM, file1, file2, csn, charset},
  66             {ConstructorType.READABLEBYTECHANNEL, file1, file2, csn, charset},};
  67     }
  68 
  69     /**
  70      * Verifies that the overloading constructor behaves the same as the
  71      * existing one.
  72      *
  73      * @param type the type of the constructor
  74      * @param file1 file1 written with the name of a charset
  75      * @param file2 file2 written with a charset
  76      * @param csn the charset name
  77      * @param charset the charset
  78      * @throws IOException
  79      */
  80     @Test(dataProvider = "parameters")
  81     void test(ConstructorType type, File file1, File file2, String csn, Charset charset)
  82             throws Exception {
  83         prepareFile(file1, TEST_STRING);
  84         prepareFile(file2, TEST_STRING);
  85 
  86         try (Scanner s1 = getScanner(type, file1.getPath(), csn, null);
  87                 Scanner s2 = getScanner(type, file2.getPath(), null, charset);) {
  88             String result1 = s1.findInLine(TEST_STRING);
  89             String result2 = s2.findInLine(TEST_STRING);
  90             Assert.assertEquals(result1, result2);
  91         }
  92     }
  93 
  94     /*
  95      * Creates a Scanner over the given input file.
  96      */
  97     Scanner getScanner(ConstructorType type, String file, String csn, Charset charset)
  98             throws Exception {
  99         if (csn != null) {
 100             switch (type) {
 101                 case FILE:
 102                     return new Scanner(new File(file), csn);
 103                 case PATH:
 104                     return new Scanner(Paths.get(file), csn);
 105                 case INPUTSTREAM:
 106                     FileInputStream fis = new FileInputStream(file);
 107                     return new Scanner(fis, csn);
 108                 case READABLEBYTECHANNEL:
 109                     FileInputStream fis1 = new FileInputStream(file);
 110                     return new Scanner(fis1.getChannel(), csn);
 111             }
 112         } else {
 113             switch (type) {
 114                 case FILE:
 115                     return new Scanner(new File(file), charset);
 116                 case PATH:
 117                     return new Scanner(Paths.get(file), charset);
 118                 case INPUTSTREAM:
 119                     FileInputStream fis = new FileInputStream(file);
 120                     return new Scanner(fis, charset);
 121                 case READABLEBYTECHANNEL:
 122                     FileInputStream fis1 = new FileInputStream(file);
 123                     return new Scanner(fis1.getChannel(), charset);
 124             }
 125         }
 126 
 127         return null;
 128     }
 129 
 130     void prepareFile(File file, String content) throws IOException {
 131         try (FileWriter writer = new FileWriter(file);) {
 132             writer.write(content);
 133         }
 134     }
 135 }