/*

 * Copyright (c) 2019, 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.

 *

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 */

/*

 * @test

 * @bug 8216140

 * @summary Test reversed BOM (U+FFFE) in the middle of a byte buffer

 *      passes through during decoding with UnicodeDecoder.

 * @run testng TestUnicodeReversedBOM

 */

import java.nio.charset.*;

import java.nio.*;

import java.util.*;

import org.testng.annotations.DataProvider;

import org.testng.annotations.Test;

@Test

public class TestUnicodeReversedBOM {

    private static byte[] A_REVERSED_BE =

        {(byte)0x0, (byte)'A', (byte)0xff, (byte)0xfe};

    private static byte[] A_REVERSED_LE =

        {(byte)'A', (byte)0x0, (byte)0xfe, (byte)0xff};

    private static byte[] BOM_REVERSED_BE =

        {(byte)0xfe, (byte)0xff, (byte)0xff, (byte)0xfe};

    private static byte[] BOM_REVERSED_LE =

        {(byte)0xff, (byte)0xfe, (byte)0xfe, (byte)0xff};

    @DataProvider

    // [(byte[])byte array, (Charset)cs]

    public static Object[][] ReversedBOM() {

        return new Object[][] {

            {A_REVERSED_BE, StandardCharsets.UTF_16},

            {A_REVERSED_LE, StandardCharsets.UTF_16},

            {A_REVERSED_BE, StandardCharsets.UTF_16BE},

            {A_REVERSED_LE, StandardCharsets.UTF_16BE},

            {A_REVERSED_BE, StandardCharsets.UTF_16LE},

            {A_REVERSED_LE, StandardCharsets.UTF_16LE},

            {BOM_REVERSED_BE, StandardCharsets.UTF_16},

            {BOM_REVERSED_LE, StandardCharsets.UTF_16},

            {BOM_REVERSED_BE, StandardCharsets.UTF_16BE},

            {BOM_REVERSED_LE, StandardCharsets.UTF_16BE},

            {BOM_REVERSED_BE, StandardCharsets.UTF_16LE},

            {BOM_REVERSED_LE, StandardCharsets.UTF_16LE},

        };

    }

    @Test(dataProvider = "ReversedBOM")

    public void testReversedBOM(byte[] ba, Charset cs) throws CharacterCodingException {

        cs.newDecoder()

            .onMalformedInput(CodingErrorAction.REPORT)

            .onUnmappableCharacter(CodingErrorAction.REPORT)

            .decode(ByteBuffer.wrap(ba));

    }

}