VASSAL.tools.io.RereadableInputStreamTest.java Source code

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Here is the source code for VASSAL.tools.io.RereadableInputStreamTest.java

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/*
 * $Id$
 *
 * Copyright (c) 2010 by Joel Uckelman
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License (LGPL) as published by the Free Software Foundation.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, copies are available
 * at http://www.opensource.org.
 */

package VASSAL.tools.io;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.IOException;

import org.apache.commons.io.input.NullInputStream;

import org.jmock.Expectations;
import org.jmock.Mockery;
import org.jmock.integration.junit4.JMock;
import org.jmock.lib.legacy.ClassImposteriser;

import org.junit.Test;
import org.junit.runner.RunWith;

import static org.junit.Assert.*;

@RunWith(JMock.class)
public class RereadableInputStreamTest {
    protected final Mockery context = new Mockery() {
        {
            setImposteriser(ClassImposteriser.INSTANCE);
        }
    };

    @Test
    public void testMarkSupported() {
        final InputStream in = new RereadableInputStream(new NullInputStream(10));
        assertTrue(in.markSupported());
    }

    @Test
    public void testReadInt() throws IOException {
        final byte[] expected = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7 };
        final InputStream in = new RereadableInputStream(new ByteArrayInputStream(expected));

        for (int i = 0; i < expected.length; ++i) {
            assertEquals(expected[i], in.read());
        }

        assertEquals(-1, in.read());
    }

    @Test
    public void testReadBytes() throws IOException {
        final byte[] expected = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7 };
        final InputStream in = new RereadableInputStream(new ByteArrayInputStream(expected));

        final byte[] actual = new byte[expected.length];
        final int count = in.read(actual);

        assertEquals(-1, in.read());
        assertArrayEquals(expected, actual);
    }

    @Test(expected = IOException.class)
    public void testResetBad() throws IOException {
        final InputStream in = new RereadableInputStream(new NullInputStream(10));
        in.reset();
    }

    @Test
    public void testMarkAndReset() throws IOException {
        final byte[] expected = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7 };
        final InputStream in = new RereadableInputStream(new ByteArrayInputStream(expected));

        in.mark(4);

        int count;

        final byte[] buf = new byte[4];
        count = in.read(buf, 0, 4);

        assertEquals(4, count);

        in.reset();

        final byte[] actual = new byte[expected.length];
        count = IOUtils.read(in, actual);

        assertEquals(expected.length, count);
        assertEquals(-1, in.read());
        assertArrayEquals(expected, actual);
    }

    @Test
    public void testClose() throws IOException {
        final InputStream child = context.mock(InputStream.class);

        context.checking(new Expectations() {
            {
                oneOf(child).close();
            }
        });

        final InputStream in = new RereadableInputStream(child);
        in.close();
    }
}