/*
* JBoss, Home of Professional Open Source.
*
* Copyright 2012 Red Hat, Inc. and/or its affiliates, and individual
* contributors as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.xnio.streams;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import org.junit.Test;
/**
* Test for {@link LimitedInputStream}.
*
* @author <a href="mailto:flavia.rainone@jboss.com">Flavia Rainone</a>
*/
public class LimitedInputStreamTestCase {
@Test
public void limitSizeIsLessThenAvailable1() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'t', 'e', 's', 't'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 2);
assertEquals(2, stream.available());
assertEquals('t', stream.read());
assertEquals('e', stream.read());
assertEquals(-1, stream.read());
}
@Test
public void limitSizeIsLessThenAvailable2() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'a', 'r', 'r', 'a', 'y'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 4);
final byte[] bytes = new byte[10];
assertEquals(4, stream.available());
assertEquals(4, stream.read(bytes));
assertEquals('a', bytes[0]);
assertEquals('r', bytes[1]);
assertEquals('r', bytes[2]);
assertEquals('a', bytes[3]);
assertEquals(-1, stream.read(bytes));
}
@Test
public void limitSizeIsEqualToAvailable1() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'t', 'e', 's', 't'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 4);
assertEquals(4, stream.available());
assertEquals('t', stream.read());
assertEquals('e', stream.read());
assertEquals('s', stream.read());
assertEquals('t', stream.read());
assertEquals(-1, stream.read());
}
@Test
public void limitSizeIsEqualToAvailable2() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'a', 'b', 'c'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 3);
final byte[] bytes = new byte[5];
assertEquals(3, stream.available());
assertEquals(3, stream.read(bytes));
assertEquals('a', bytes[0]);
assertEquals('b', bytes[1]);
assertEquals('c', bytes[2]);
assertEquals(-1, stream.read(bytes));
}
@Test
public void limitSizeIsMoreThanAvailable1() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'t', 'e', 's', 't'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 10);
assertEquals(4, stream.available());
assertEquals('t', stream.read());
assertEquals('e', stream.read());
assertEquals('s', stream.read());
assertEquals('t', stream.read());
assertEquals(-1, stream.read());
}
@Test
public void limitSizeIsMoreThanAvailable2() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'m', 'o', 'r', 'e'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 5);
final byte[] bytes = new byte[5];
assertEquals(4, stream.available());
assertEquals(4, stream.read(bytes));
assertEquals('m', bytes[0]);
assertEquals('o', bytes[1]);
assertEquals('r', bytes[2]);
assertEquals('e', bytes[3]);
assertEquals(-1, stream.read(bytes));
}
@Test
public void skipWithLimitSizeLessThenAvailable() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'s', 'k', 'i', 'p',
'p', 'i', 'k', 's'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 6);
assertEquals(0, stream.skip(-5));
assertEquals(6, stream.available());
assertEquals(2, stream.skip(2));
assertEquals(4, stream.available());
assertEquals(4, stream.skip(10));
assertEquals(0, stream.available());
assertEquals(0, stream.skip(10));
}
@Test
public void skipWithLimitSizeEqualToAvailable() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'s', 'k', 'i', 'p',
'p', 'i', 'k', 's'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 8);
assertEquals(0, stream.skip(-1));
assertEquals(8, stream.available());
assertEquals(8, stream.skip(8));
assertEquals(0, stream.available());
assertEquals(0, stream.skip(3));
assertEquals(0, stream.available());
}
@Test
public void skipWithLimitSizeMoreThanAvailable() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'s', 'k', 'i', 'p',
'p', 'i', 'k', 's'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 9);
assertEquals(0, stream.skip(0));
assertEquals(8, stream.available());
assertEquals(5, stream.skip(5));
assertEquals(3, stream.available());
assertEquals(3, stream.skip(10));
assertEquals(0, stream.available());
assertEquals(0, stream.skip(10));
}
@Test
public void closeStream() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'c', 'l', 'o', 's', 'e'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 10);
assertEquals(5, stream.available());
stream.close();
assertEquals(0, stream.available());
assertEquals(-1, stream.read());
assertEquals(-1, stream.read(new byte[3]));
}
@Test
public void markAndReset() throws IOException {
final ByteArrayInputStream delegateStream = new ByteArrayInputStream(new byte[] {'m', 'a', 'r', 'k',
'r', 'e', 's', 'e', 't'});
final LimitedInputStream stream = new LimitedInputStream(delegateStream, 8);
IOException expected = null;
try {
stream.reset();
} catch (IOException e) {
expected = e;
}
assertNotNull(expected);
assertTrue(stream.markSupported());
assertEquals('m', stream.read());
assertEquals('a', stream.read());
stream.mark(2);
assertEquals('r', stream.read());
assertEquals('k', stream.read());
stream.reset();
assertEquals('r', stream.read());
assertEquals('k', stream.read());
stream.mark(3);
assertEquals('r', stream.read());
assertEquals('e', stream.read());
assertEquals('s', stream.read());
assertEquals('e', stream.read());
assertEquals(-1, stream.read());
stream.reset();
assertEquals('r', stream.read());
}
}