Quelle ConstructorTest.java Sprache: JAVA

/*
* 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.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
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,
        STRING_APPEND,
        FILE_APPEND
    }

    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, "FileWriterTest1.txt");
        File file2 = new File(USER_DIR, "FileWriterTest2.txt");

        return new Object[][]{
            {ConstructorType.STRING, file1, file2, StandardCharsets.UTF_8},
            {ConstructorType.FILE, file1, file2, StandardCharsets.UTF_8},
            {ConstructorType.STRING_APPEND, file1, file2, StandardCharsets.UTF_8},
            {ConstructorType.FILE_APPEND, file1, file2, StandardCharsets.UTF_8},
            {ConstructorType.STRING, file1, file2, StandardCharsets.ISO_8859_1},
            {ConstructorType.FILE, file1, file2, StandardCharsets.ISO_8859_1},
            {ConstructorType.STRING_APPEND, file1, file2, StandardCharsets.ISO_8859_1},
            {ConstructorType.FILE_APPEND, file1, file2, StandardCharsets.ISO_8859_1},
        };
    }

    /**
     * Verifies that the new constructors that take a Charset function the same
     * as an OutputStreamWriter on a FileOutputStream as was recommended before
     * this change.
     *
     * @param type the type of the constructor
     * @param file1 file1 to be written with a FileWriter
     * @param file2 file2 to be written  with an OutputStreamWriter
     * @param charset the charset
     * @throws IOException
     */
    @Test(dataProvider = "parameters")
    void test(ConstructorType type, File file1, File file2, Charset charset)
            throws Exception {
        writeWithFileWriter(type, file1, TEST_STRING, charset);
        writeWithOutputStreamWriter(type, file2, TEST_STRING, charset);

        try (
                FileReader r1 = getFileReader(type, file1, charset);
                FileReader r2 = getFileReader(type, file2, charset);
            ) {
            String result1 = readAll(r1, BUFFER_SIZE);
            String result2 = readAll(r2, 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:
            case STRING_APPEND:
                return new FileReader(file.getPath(), charset);
            case FILE:
            case FILE_APPEND:
                return new FileReader(file, charset);
        }

        return null;
    }

    /*
     * Creates a FileWriter using the constructor as specified.
     */
    FileWriter getFileWriter(ConstructorType type, File file, Charset charset)
            throws IOException {
        switch (type) {
            case STRING:
                return new FileWriter(file.getPath(), charset);
            case FILE:
                return new FileWriter(file, charset);
            case STRING_APPEND:
                return new FileWriter(file.getPath(), charset, true);
            case FILE_APPEND:
                return new FileWriter(file, charset, true);
        }

        return null;
    }

    void writeWithFileWriter(ConstructorType type, File file, String content, Charset charset)
            throws IOException {
        if (type == ConstructorType.STRING_APPEND || type == ConstructorType.FILE_APPEND) {
            try (FileWriter writer = getFileWriter(ConstructorType.FILE, file, charset);) {
                writer.write(content);
            }
        }
        try (FileWriter writer = getFileWriter(type, file, charset);) {
            writer.write(content);
        }
    }

    void writeWithOutputStreamWriter(ConstructorType type, File file, String content, Charset charset)
            throws IOException {
        try (OutputStreamWriter writer = new OutputStreamWriter(new FileOutputStream(file), charset)) {
            writer.write(content);
            if (type == ConstructorType.STRING_APPEND || type == ConstructorType.FILE_APPEND) {
                writer.write(content);
            }
        }
    }
}

quality88%

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.