/*

 * 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.ByteArrayOutputStream;

import java.io.InputStream;

import java.io.IOException;

import org.testng.annotations.AfterGroups;

import org.testng.annotations.BeforeGroups;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

/*

 * @test

 * @run testng NullInputStream

 * @summary Check for expected behavior of InputStream.nullInputStream().

 */

public class NullInputStream {

    private static InputStream openStream;

    private static InputStream closedStream;

    @BeforeGroups(groups="open")

    public static void openStream() {

        openStream = InputStream.nullInputStream();

    }

    @BeforeGroups(groups="closed")

    public static void openAndCloseStream() {

        closedStream = InputStream.nullInputStream();

        try {

           closedStream.close();

        } catch (IOException e) {

            fail("Unexpected IOException");

        }

    }

    @AfterGroups(groups="open")

    public static void closeStream() {

        try {

            openStream.close();

        } catch (IOException e) {

            fail("Unexpected IOException");

        }

    }

    @Test(groups = "open")

    public static void testOpen() {

        assertNotNull(openStream, "InputStream.nullInputStream() returned null");

    }

    @Test(groups = "open")

    public static void testAvailable() {

        try {

            assertEquals(0, openStream.available(), "available() != 0");

        } catch (IOException ioe) {

            fail("Unexpected IOException");

        }

    }

    @Test(groups = "open")

    public static void testRead() {

        try {

            assertEquals(-1, openStream.read(), "read() != -1");

        } catch (IOException ioe) {

            fail("Unexpected IOException");

        }

    }

    @Test(groups = "open")

    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(groups = "open")

    public static void testReadAllBytes() {

        try {

            assertEquals(0, openStream.readAllBytes().length,

                "readAllBytes().length != 0");

        } catch (IOException ioe) {

            fail("Unexpected IOException");

        }

    }

    @Test(groups = "open")

        try {

            assertEquals(0, openStream.readNBytes(new byte[1], 0, 1),

                "readNBytes(byte[],int,int) != 0");

        } catch (IOException ioe) {

            fail("Unexpected IOException");

        }

    }

    @Test(groups = "open")

    public static void testSkip() {

        try {

            assertEquals(0, openStream.skip(1), "skip() != 0");

        } catch (IOException ioe) {

            fail("Unexpected IOException");

        }

    }

    @Test(groups = "open")

    public static void testTransferTo() {

        try {

            assertEquals(0, openStream.transferTo(new ByteArrayOutputStream(7)),

                "transferTo() != 0");

        } catch (IOException ioe) {

            fail("Unexpected IOException");

        }

    }

    @Test(groups = "closed")

    public static void testAvailableClosed() {

        try {

            closedStream.available();

            fail("Expected IOException not thrown");

        } catch (IOException e) {

        }

    }

    @Test(groups = "closed")

    public static void testReadClosed() {

        try {

            closedStream.read();

            fail("Expected IOException not thrown");

        } catch (IOException e) {

        }

    }

    @Test(groups = "closed")

    public static void testReadBIIClosed() {

        try {

            closedStream.read(new byte[1], 0, 1);

            fail("Expected IOException not thrown");

        } catch (IOException e) {

        }

    }

    @Test(groups = "closed")

    public static void testReadAllBytesClosed() {

        try {

            closedStream.readAllBytes();

            fail("Expected IOException not thrown");

        } catch (IOException e) {

        }

    }

    @Test(groups = "closed")

    public static void testReadNBytesClosed() {

        try {

            closedStream.readNBytes(new byte[1], 0, 1);

            fail("Expected IOException not thrown");

        } catch (IOException e) {

        }

    }

    @Test(groups = "closed")

    public static void testSkipClosed() {

        try {

            closedStream.skip(1);

            fail("Expected IOException not thrown");

        } catch (IOException e) {

        }

    }

    @Test(groups = "closed")

    public static void testTransferToClosed() {

        try {

            closedStream.transferTo(new ByteArrayOutputStream(7));

            fail("Expected IOException not thrown");

        } catch (IOException e) {

        }

    }

}