/*

 * Copyright (c) 2017, 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.FileOutputStream;

import java.io.IOException;

import java.io.PrintWriter;

import java.nio.charset.Charset;

import java.nio.charset.StandardCharsets;

import java.nio.file.Files;

import java.nio.file.Paths;

import org.testng.Assert;

import org.testng.annotations.DataProvider;

import org.testng.annotations.Test;

/**

 * @test

 * @bug 8183743

 * @summary Test to verify the new overload method with Charset functions the same

 * as the existing method that takes a charset name.

 * @run testng EncodingTest

 */

public class EncodingTest {

    static String USER_DIR = System.getProperty("user.dir", ".");

    static boolean AUTOFLUSH = true;

    public static enum ConstructorType {

        STRING,

        FILE,

        OUTPUTSTREAM

    }

    /*

     * DataProvider fields:

     * Type of the constructor, a file to be written with a charset name,

     * a file to be written with a charset, charset name, charset.

     */

    @DataProvider(name = "parameters")

    public Object[][] getParameters() throws IOException {

        String csn = StandardCharsets.UTF_8.name();

        Charset charset = StandardCharsets.UTF_8;

        File file1 = new File(USER_DIR, "PWCharsetTest1.txt");

        File file2 = new File(USER_DIR, "PWCharsetTest2.txt");

        return new Object[][]{

            {ConstructorType.STRING, file1, file2, csn, charset},

            {ConstructorType.FILE, file1, file2, csn, charset},

            {ConstructorType.OUTPUTSTREAM, file1, file2, csn, charset}

        };

    }

    /**

     * Verifies that the overloading constructor behaves the same as the existing

     * one.

     *

     * @param type the type of the constructor

     * @param file1 file1 written with the name of a charset

     * @param file2 file2 written with a charset

     * @param csn the charset name

     * @param charset the charset

     * @throws IOException

     */

    @Test(dataProvider = "parameters")

    public void test(ConstructorType type, File file1, File file2, String csn, Charset charset)

            throws Exception {

        createFile(getWriter(type, file1.getPath(), csn, null));

        createFile(getWriter(type, file2.getPath(), null, charset));

        Assert.assertEquals(Files.readAllLines(Paths.get(file1.getPath()), charset),

                Files.readAllLines(Paths.get(file2.getPath()), charset));

    }

    void createFile(PrintWriter out) throws IOException {

        out.println("high surrogate");

        out.println(Character.MIN_HIGH_SURROGATE);

        out.println("low surrogate");

        out.println(Character.MIN_LOW_SURROGATE);

        out.flush();

        out.close();

    }

    PrintWriter getWriter(ConstructorType type, String path, String csn, Charset charset)

            throws IOException {

        PrintWriter out = null;

        if (csn != null) {

            switch (type) {

                case STRING:

                    out = new PrintWriter(path, csn);

                    break;

                case FILE:

                    out = new PrintWriter(new File(path), csn);

                    break;

                case OUTPUTSTREAM:

                    // No corresponding method with charset name

                    // compare with PrintWriter(path, csn) instead

                    out = new PrintWriter(path, csn);

                    break;

            }

        } else {

            switch (type) {

                case STRING:

                    out = new PrintWriter(path, charset);

                    break;

                case FILE:

                    out = new PrintWriter(new File(path), charset);

                    break;

                case OUTPUTSTREAM:

                    FileOutputStream fout = new FileOutputStream(path);

                    out = new PrintWriter(fout, AUTOFLUSH, charset);

                    break;

            }

        }

        return out;

    }

}