Quelle NullInputStream.java Sprache: JAVA

/*
* Copyright (c) 2018, 2021, 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 org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

import java.io.ByteArrayOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;

import static org.testng.Assert.*;

/*
* @test
* @bug 4358774 6516099 8139206
* @run testng NullInputStream
* @summary Check for expected behavior of InputStream.nullInputStream().
*/
public class NullInputStream {
    private static InputStream openStream;
    private static InputStream closedStream;

    @BeforeClass
    public static void setup() {
        openStream = InputStream.nullInputStream();
        closedStream = InputStream.nullInputStream();
        try {
           closedStream.close();
        } catch (IOException e) {
            fail("Unexpected IOException");
        }
    }

    @AfterClass
    public static void closeStream() {
        try {
            openStream.close();
        } catch (IOException e) {
            fail("Unexpected IOException");
        }
    }

    @Test
    public static void testOpen() {
        assertNotNull(openStream, "InputStream.nullInputStream() returned null");
    }

    @Test
    public static void testAvailable() {
        try {
            assertEquals(0, openStream.available(), "available() != 0");
        } catch (IOException ioe) {
            fail("Unexpected IOException");
        }
    }

    @Test
    public static void testRead() {
        try {
            assertEquals(-1, openStream.read(), "read() != -1");
        } catch (IOException ioe) {
            fail("Unexpected IOException");
        }
    }

    @Test
    public static void testReadBII() {
        try {
            assertEquals(-1, openStream.read(new byte[1], 0, 1),
                "read(byte[],int,int) != -1");
        } catch (IOException ioe) {
            fail("Unexpected IOException");
        }
    }

    @Test
    public static void testReadAllBytes() {
        try {
            assertEquals(0, openStream.readAllBytes().length,
                "readAllBytes().length != 0");
        } catch (IOException ioe) {
            fail("Unexpected IOException");
        }
    }

    @Test
    public static void testReadNBytes() {
        try {
            assertEquals(0, openStream.readNBytes(new byte[1], 0, 1),
                "readNBytes(byte[],int,int) != 0");
        } catch (IOException ioe) {
            fail("Unexpected IOException");
        }
    }

    @Test
    public static void testReadNBytesWithLength() {
        try {
            assertEquals(0, openStream.readNBytes(-1).length,
                "readNBytes(-1) != 0");
            fail("Expected IllegalArgumentException not thrown");
        } catch (IllegalArgumentException iae) {
        } catch (IOException ioe) {
            fail("Unexpected IOException");
        }
        try {
            assertEquals(0, openStream.readNBytes(0).length,
                "readNBytes(0, false) != 0");
            assertEquals(0, openStream.readNBytes(1).length,
                "readNBytes(1, false) != 0");
        } catch (IOException ioe) {
            fail("Unexpected IOException");
        }
    }

    @Test
    public static void testSkip() {
        try {
            assertEquals(0, openStream.skip(1), "skip() != 0");
        } catch (IOException ioe) {
            fail("Unexpected IOException");
        }
    }

    @Test
    public static void testSkipNBytes() {
        try {
            openStream.skipNBytes(-1);
            openStream.skipNBytes(0);
        } catch (IOException ioe) {
            fail("Unexpected IOException");
        }
    }

    @Test(expectedExceptions = EOFException.class)
    public static void testSkipNBytesEOF() throws IOException {
        openStream.skipNBytes(1);
    }

    @Test
    public static void testTransferTo() {
        try {
            assertEquals(0, openStream.transferTo(new ByteArrayOutputStream(7)),
                "transferTo() != 0");
        } catch (IOException ioe) {
            fail("Unexpected IOException");
        }
    }

    @Test
    public static void testAvailableClosed() {
        try {
            closedStream.available();
            fail("Expected IOException not thrown");
        } catch (IOException e) {
        }
    }

    @Test
    public static void testReadClosed() {
        try {
            closedStream.read();
            fail("Expected IOException not thrown");
        } catch (IOException e) {
        }
    }

    @Test
    public static void testReadBIIClosed() {
        try {
            closedStream.read(new byte[1], 0, 1);
            fail("Expected IOException not thrown");
        } catch (IOException e) {
        }
    }

    @Test
    public static void testReadAllBytesClosed() {
        try {
            closedStream.readAllBytes();
            fail("Expected IOException not thrown");
        } catch (IOException e) {
        }
    }

    @Test
    public static void testReadNBytesClosed() {
        try {
            closedStream.readNBytes(new byte[1], 0, 1);
            fail("Expected IOException not thrown");
        } catch (IOException e) {
        }
    }

    @Test
    public static void testReadNBytesWithLengthClosed() {
        try {
            closedStream.readNBytes(1);
            fail("Expected IOException not thrown");
        } catch (IOException e) {
        }
    }

    @Test
    public static void testSkipClosed() {
        try {
            closedStream.skip(1);
            fail("Expected IOException not thrown");
        } catch (IOException e) {
        }
    }

    @Test
    public static void testSkipNBytesClosed() {
        try {
            closedStream.skipNBytes(1);
            fail("Expected IOException not thrown");
        } catch (IOException e) {
        }
    }

    @Test
    public static void testTransferToClosed() {
        try {
            closedStream.transferTo(new ByteArrayOutputStream(7));
            fail("Expected IOException not thrown");
        } catch (IOException e) {
        }
    }
}

quality90%

¤ Dauer der Verarbeitung: 0.1 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.