| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.commons.compress.utils; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.EOFException; |
| import java.io.FilterInputStream; |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.ReadableByteChannel; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| public class IOUtilsTest { |
| |
| private interface StreamWrapper { |
| InputStream wrap(InputStream toWrap); |
| } |
| |
| @Test |
| public void skipUsingSkip() throws Exception { |
| skip(new StreamWrapper() { |
| @Override |
| public InputStream wrap(final InputStream toWrap) { |
| return toWrap; |
| } |
| }); |
| } |
| |
| @Test |
| public void skipUsingRead() throws Exception { |
| skip(new StreamWrapper() { |
| @Override |
| public InputStream wrap(final InputStream toWrap) { |
| return new FilterInputStream(toWrap) { |
| @Override |
| public long skip(final long s) { |
| return 0; |
| } |
| }; |
| } |
| }); |
| } |
| |
| @Test |
| public void skipUsingSkipAndRead() throws Exception { |
| skip(new StreamWrapper() { |
| @Override |
| public InputStream wrap(final InputStream toWrap) { |
| return new FilterInputStream(toWrap) { |
| boolean skipped; |
| @Override |
| public long skip(final long s) throws IOException { |
| if (!skipped) { |
| toWrap.skip(5); |
| skipped = true; |
| return 5; |
| } |
| return 0; |
| } |
| }; |
| } |
| }); |
| } |
| |
| @Test |
| public void readFullyOnChannelReadsFully() throws IOException { |
| ByteBuffer b = ByteBuffer.allocate(20); |
| final byte[] source = new byte[20]; |
| for (byte i = 0; i < 20; i++) { |
| source[i] = i; |
| } |
| readFully(source, b); |
| Assert.assertArrayEquals(source, b.array()); |
| } |
| |
| @Test(expected = EOFException.class) |
| public void readFullyOnChannelThrowsEof() throws IOException { |
| ByteBuffer b = ByteBuffer.allocate(21); |
| final byte[] source = new byte[20]; |
| for (byte i = 0; i < 20; i++) { |
| source[i] = i; |
| } |
| readFully(source, b); |
| } |
| |
| @Test(expected = IllegalArgumentException.class) |
| public void copyThrowsOnZeroBufferSize() throws IOException { |
| IOUtils.copy(new ByteArrayInputStream(new byte[0]), new ByteArrayOutputStream(), 0); |
| } |
| |
| private static void readFully(final byte[] source, ByteBuffer b) throws IOException { |
| IOUtils.readFully(new ReadableByteChannel() { |
| private int idx; |
| @Override |
| public int read(ByteBuffer buf) { |
| if (idx >= source.length) { |
| return -1; |
| } |
| buf.put(source[idx++]); |
| return 1; |
| } |
| @Override |
| public void close() { } |
| @Override |
| public boolean isOpen() { |
| return true; |
| } |
| }, b); |
| } |
| |
| private void skip(final StreamWrapper wrapper) throws Exception { |
| final ByteArrayInputStream in = new ByteArrayInputStream(new byte[] { |
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 |
| }); |
| final InputStream sut = wrapper.wrap(in); |
| Assert.assertEquals(10, IOUtils.skip(sut, 10)); |
| Assert.assertEquals(11, sut.read()); |
| } |
| } |