core/src/test/java/hivemall/utils/io/Base91OutputStreamTest.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
 * under the License.
 */
package hivemall.utils.io;

import hivemall.factorization.fm.ArrayModelTest;
import hivemall.utils.codec.Base91;

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

import org.junit.Assert;
import org.junit.Test;

public class Base91OutputStreamTest {

    @Test
    public void testSmallEncodeOutDecodeIn() throws IOException {
        byte[] expected = "abcdecf".getBytes();

        FastByteArrayOutputStream bos = new FastByteArrayOutputStream();
        Base91OutputStream base91os = new Base91OutputStream(bos);
        base91os.write(expected);
        base91os.finish();
        byte[] encoded = bos.toByteArray();
        IOUtils.closeQuietly(base91os);
        Assert.assertArrayEquals(Base91.encode(expected), encoded);

        FastByteArrayInputStream bis = new FastByteArrayInputStream(encoded);
        Base91InputStream base91in = new Base91InputStream(bis);

        byte[] actual = IOUtils.toByteArray(base91in);
        Assert.assertArrayEquals(expected, actual);
    }

    @Test
    public void testLargeEncodeOutDecodeIn() throws IOException {
        InputStream in = ArrayModelTest.class.getResourceAsStream("bigdata.tr.txt.gz");
        byte[] expected = IOUtils.toByteArray(in);

        FastByteArrayOutputStream bos = new FastByteArrayOutputStream();
        Base91OutputStream base91os = new Base91OutputStream(bos);
        base91os.write(expected);
        base91os.finish();
        byte[] encoded = bos.toByteArray();
        IOUtils.closeQuietly(base91os);

        Assert.assertArrayEquals(Base91.encode(expected), encoded);
        Assert.assertArrayEquals(Base91.decode(encoded), expected);

        FastByteArrayInputStream bis = new FastByteArrayInputStream(encoded);
        Base91InputStream base91in = new Base91InputStream(bis);

        byte[] actual = IOUtils.toByteArray(base91in);
        Assert.assertArrayEquals(expected, actual);
    }

}