Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/Sources/formale Sprachen/Java/Openjdk/test/jdk/java/io/InputStream/ (Sun/Oracle ^©) Datei vom 13.11.2022 mit Größe 9 kB

Quelle OpsAfterClose.java Sprache: JAVA

/*
* Copyright (c) 2006, 2010, 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.
*/

/**
*  @test
*  @bug  4181483
*  @summary Test if InputStream methods will check if the stream
*          has been closed.
*/

import java.io.*;

public enum OpsAfterClose {

        READ { boolean check(InputStream is) {
                    try {
                        int read = is.read();
                        System.out.println("read returns: " + read);
                    } catch (IOException io) {
                        System.out.print("Excep Msg: "+ io.getMessage() + ", ");
                        return true;
                    }
                    return false;
             } },

        READ_BUF { boolean check(InputStream is) {
                    try {
                        byte buf[] = new byte[2];
                        int read = is.read(buf);
                        System.out.println("read(buf) returns: " + read);
                    } catch (IOException io) {
                        System.out.print("Excep Msg: "+ io.getMessage() + ", ");
                        return true;
                    }
                    return false;
            } },
        READ_BUF_OFF { boolean check(InputStream is) {
                    try {
                        byte buf[] = new byte[2];
                        int len = 1;
                        int read = is.read(buf, 0, len);
                        System.out.println("read(buf, 0, len) returns: " + read);
                    } catch (IOException io) {
                        System.out.print("Excep Msg: "+ io.getMessage() + ", ");
                        return true;
                    }
                    return false;
             } },
        AVAILABLE { boolean check(InputStream is) {
                    try {
                        int avail = is.available();
                        System.out.println("available() returns: " + avail);
                        return false;
                    } catch (IOException io) {
                        System.out.print("Excep Msg: "+ io.getMessage() + ", ");
                        return true;
                    }
             } },
        SKIP { boolean check(InputStream is) {
                    try {
                        long skipped = is.skip(1);
                        System.out.println("skip() returns: " + skipped);
                    } catch (IOException io) {
                        System.out.print("Excep Msg: "+ io.getMessage() + ", ");
                        return true;
                    }
                    return false;
             } },
        MARK { boolean check(InputStream is) {
                    is.mark(20);
                    return true;
             } },
        RESET { boolean check(InputStream is) {
                    try {
                        is.reset();
                    } catch (IOException io) {
                        System.out.print("Excep Msg: "+ io.getMessage() + ", ");
                        return true;
                    }
                    return false;
             } },
        MARK_SUPPORTED { boolean check(InputStream is) {
                    is.markSupported();
                    return true;
             } },
        CLOSE { boolean check(InputStream is) {
                try {
                    is.close();
                    return true; // No Exception thrown on windows for FileInputStream
                } catch (IOException io) {
                    System.out.print("Excep Msg: "+ io.getMessage() + ", ");
                    return true; // Exception thrown on solaris and linux for FileInputStream
                }
             } };

    abstract boolean check(InputStream is);

    public static void main(String args[]) throws Exception {

        boolean failed = false;

        File f = new File(System.getProperty("test.dir", "."),
                          "f.txt");
        f.createNewFile();
        f.deleteOnExit();

        FileInputStream fis = new FileInputStream(f);
        try {
            if (testInputStream(fis)) {
                failed = true;
            }
            if (testFileInputStream(fis)) {
                failed = true;
            }
        } finally {
            fis.close();
        }

        BufferedInputStream bs =  new BufferedInputStream(
                                        new FileInputStream(f));
        try {
            if (testInputStream(bs)) {
                failed = true;
            }
        } finally {
            bs.close();
        }

        DataInputStream dis = new DataInputStream(
                                new FileInputStream(f));
        try {
            if (testInputStream(dis)) {
                failed = true;
            }
        } finally {
            dis.close();
        }

        PushbackInputStream pbis = new PushbackInputStream(
                                new ByteArrayInputStream(new byte[20]));
        if (testInputStream(pbis)) {
            failed = true;
        }

        if (testPushbackInputStream(pbis)) {
            failed = true;
        }

        PipedInputStream pis = new PipedInputStream(new PipedOutputStream());
        if (testInputStream(pis)) {
            failed = true;
        }

        /**
         * The SequenceInputStream and  ObjectInputStream does not throw IOException

        SequenceInputStream sqis = new SequenceInputStream(
                                        new FileInputStream(f),
                                        new PipedInputStream(new PipedOutputStream())
                                    );
        if (testInputStream(sqis)) {
            failed = true;
        }

        String serStr = "abc";
        ObjectOutputStream oos = new ObjectOutputStream(
                                    new FileOutputStream(f));
        oos.writeObject(serStr);
        oos.close();

        ObjectInputStream ois = new ObjectInputStream(
                                    new FileInputStream(f));
        if (testInputStream(ois)) {
            failed = true;
        }

        */

        if (failed) {
            throw new Exception(
                "Some Op for some Stream failed, check the failed status above");
        }
    }

    private static boolean testInputStream(InputStream is)
            throws Exception {
        is.close();
        boolean failed = false;
        boolean result;
        System.out.println("Testing :" + is);
        for (OpsAfterClose op : OpsAfterClose.values()) {

            if (op.equals(AVAILABLE) && (is instanceof PipedInputStream)) {
                // skip the test as available() returns 0
                continue;
            }

            result = op.check(is);
            if (!result) {
                failed = true;
            }
           System.out.println(op + ":" + result);
        }
        if (failed) {
            System.out.println("Test failed for the failed operation{s}" +
                        " above for :" + is);
        }
        return failed;
    }

    private static boolean testPushbackInputStream(PushbackInputStream pis)
                throws Exception {
        boolean failed = false;
        try {
            pis.unread(1);
            System.out.println("Test failed for unread(int):" + pis);
            failed = true;
        } catch (IOException io) {
           System.out.println("UNREAD(int):true");
        }

        byte buf[] = new byte[2];
        try {
            pis.unread(buf, 0, 2);
            System.out.println("Test failed for unread(buf, offset, len):" +
                                pis);
            failed = true;
        } catch (IOException io) {
           System.out.println("UNREAD(buf, offset, len):true");
        }
        try {
            pis.unread(buf);
            System.out.println("Test failed for unread(char[] buf):" + pis);
            failed = true;
        } catch (IOException io) {
           System.out.println("UNREAD(buf):true");
        }
        return failed;
    }

    private static boolean testFileInputStream(FileInputStream fis)
                throws Exception {
        boolean failed = false;
        try {
            fis.getFD();
            System.out.println("GetFD: true");
        } catch (IOException io) {
           System.out.println("GetFD: false");
           failed = true;
        }
        fis.getChannel();
        System.out.println("GetChannel: true");
        return failed;
    }
}

quality91%

¤ Dauer der Verarbeitung: 0.2 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.