/*

 * 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

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 */

import java.io.IOException;

import java.io.Writer;

import org.testng.annotations.AfterGroups;

import org.testng.annotations.BeforeGroups;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

/*

 * @test

 * @bug 8196298

 * @run testng NullWriter

 * @summary Check for expected behavior of Writer.nullWriter().

 */

public class NullWriter {

    private static Writer openWriter;

    private static Writer closedWriter;

    @BeforeGroups(groups = "open")

    public static void openStream() {

        openWriter = Writer.nullWriter();

    }

    @BeforeGroups(groups = "closed")

    public static void openAndCloseStream() throws IOException {

        closedWriter = Writer.nullWriter();

        closedWriter.close();

    }

    @AfterGroups(groups = "open")

    public static void closeStream() throws IOException {

        openWriter.close();

    }

    @Test(groups = "open")

    public static void testOpen() {

        assertNotNull(openWriter, "Writer.nullWriter() returned null");

    }

    @Test(groups = "open")

    public static void testAppendChar() throws IOException {

        assertSame(openWriter, openWriter.append('x'));

    }

    @Test(groups = "open")

    public static void testAppendCharSequence() throws IOException {

        CharSequence cs = "abc";

        assertSame(openWriter, openWriter.append(cs));

    }

    @Test(groups = "open")

    public static void testAppendCharSequenceNull() throws IOException {

        assertSame(openWriter, openWriter.append(null));

    }

    @Test(groups = "open")

    public static void testAppendCharSequenceII() throws IOException {

        CharSequence cs = "abc";

        assertSame(openWriter, openWriter.append(cs, 0, 1));

    }

    @Test(groups = "open")

    public static void testAppendCharSequenceIINull() throws IOException {

        assertSame(openWriter, openWriter.append(null, 2, 1));

    }

    @Test(groups = "open")

    public static void testFlush() throws IOException {

        openWriter.flush();

    }

    @Test(groups = "open")

    public static void testWrite() throws IOException {

        openWriter.write(62832);

    }

    @Test(groups = "open")

    public static void testWriteString() throws IOException {

        openWriter.write("");

    }

    @Test(groups = "open")

    public static void testWriteStringII() throws IOException {

        openWriter.write("", 0, 0);

    }

    @Test(groups = "open")

    public static void testWriteBII() throws IOException, Exception {

        openWriter.write(new char[]{(char) 6}, 0, 1);

    }

    @Test(groups = "closed", expectedExceptions = IOException.class)

    public static void testAppendCharClosed() throws IOException {

        closedWriter.append('x');

    }

    @Test(groups = "closed", expectedExceptions = IOException.class)

    public static void testAppendCharSequenceClosed() throws IOException {

        CharSequence cs = "abc";

        closedWriter.append(cs);

    }

    @Test(groups = "closed", expectedExceptions = IOException.class)

    public static void testAppendCharSequenceNullClosed() throws IOException {

        closedWriter.append(null);

    }

    @Test(groups = "closed", expectedExceptions = IOException.class)

    public static void testAppendCharSequenceIIClosed() throws IOException {

        CharSequence cs = "abc";

        closedWriter.append(cs, 0, 1);

    }

    @Test(groups = "closed", expectedExceptions = IOException.class)

    public static void testAppendCharSequenceIINullClosed() throws IOException {

        closedWriter.append(null, 2, 1);

    }

    @Test(groups = "closed", expectedExceptions = IOException.class)

    public static void testFlushClosed() throws IOException {

        closedWriter.flush();

    }

    @Test(groups = "closed", expectedExceptions = IOException.class)

    public static void testWriteClosed() throws IOException {

        closedWriter.write(62832);

    }

    @Test(groups = "closed", expectedExceptions = IOException.class)

    public static void testWriteStringClosed() throws IOException {

        closedWriter.write("");

    }

    @Test(groups = "closed", expectedExceptions = IOException.class)

    public static void testWriteStringIIClosed() throws IOException {

        closedWriter.write("", 0, 0);

    }

    @Test(groups = "closed", expectedExceptions = IOException.class)

    public static void testWriteBIIClosed() throws IOException {

        closedWriter.write(new char[]{(char) 6}, 0, 1);

    }

}