httpclient5/src/test/java/org/apache/hc/client5/http/entity/TestDeflate.java

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 * distributed with this work for additional information
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 * 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
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 *   http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing,
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 * KIND, either express or implied.  See the License for the
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package org.apache.hc.client5.http.entity;

import java.nio.charset.StandardCharsets;
import java.util.zip.Deflater;

import org.apache.hc.core5.http.ContentType;
import org.apache.hc.core5.http.HttpEntity;
import org.apache.hc.core5.http.io.entity.ByteArrayEntity;
import org.apache.hc.core5.http.io.entity.EntityUtils;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

public class TestDeflate {

    @Test
    public void testCompressDecompress() throws Exception {

        final String s = "some kind of text";
        final byte[] input = s.getBytes(StandardCharsets.US_ASCII);

        // Compress the bytes
        final byte[] compressed = new byte[input.length * 2];
        final Deflater compresser = new Deflater();
        compresser.setInput(input);
        compresser.finish();
        final int len = compresser.deflate(compressed);

        final HttpEntity entity = new DeflateDecompressingEntity(new ByteArrayEntity(compressed, 0, len, ContentType.APPLICATION_OCTET_STREAM));
        Assertions.assertEquals(s, EntityUtils.toString(entity));
    }

}