src/test/java/org/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStreamTest.java

/*
 * 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
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 */
package org.apache.commons.compress.compressors.lz4;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;

import org.apache.commons.compress.AbstractTest;
import org.apache.commons.compress.utils.IOUtils;
import org.junit.jupiter.api.Test;

public class BlockLZ4CompressorInputStreamTest extends AbstractTest {

    @Test
    public void testMultiByteReadConsistentlyReturnsMinusOneAtEof() throws IOException {
        final File input = getFile("bla.tar.block_lz4");
        final byte[] buf = new byte[2];
        try (InputStream is = Files.newInputStream(input.toPath());
                BlockLZ4CompressorInputStream in = new BlockLZ4CompressorInputStream(is)) {
            IOUtils.toByteArray(in);
            assertEquals(-1, in.read(buf));
            assertEquals(-1, in.read(buf));
        }
    }

    @Test
    public void testReadBlaLz4() throws IOException {
        try (InputStream a = new BlockLZ4CompressorInputStream(newInputStream("bla.tar.block_lz4"));
                InputStream e = newInputStream("bla.tar")) {
            final byte[] expected = IOUtils.toByteArray(e);
            final byte[] actual = IOUtils.toByteArray(a);
            assertArrayEquals(expected, actual);
        }
    }

    @Test
    public void testSingleByteReadConsistentlyReturnsMinusOneAtEof() throws IOException {
        final File input = getFile("bla.tar.block_lz4");
        try (InputStream is = Files.newInputStream(input.toPath());
                BlockLZ4CompressorInputStream in = new BlockLZ4CompressorInputStream(is)) {
            IOUtils.toByteArray(in);
            assertEquals(-1, in.read());
            assertEquals(-1, in.read());
        }
    }
}