TestFastDecompressionMode.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
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package org.apache.lucene.codecs.compressing;


import java.io.IOException;

public class TestFastDecompressionMode extends AbstractTestLZ4CompressionMode {

  @Override
  public void setUp() throws Exception {
    super.setUp();
    mode = CompressionMode.FAST_DECOMPRESSION;
  }

  @Override
  public byte[] test(byte[] decompressed, int off, int len) throws IOException {
    final byte[] compressed = super.test(decompressed, off, len);
    final byte[] compressed2 = compress(CompressionMode.FAST.newCompressor(), decompressed, off, len);
    // because of the way this compression mode works, its output is necessarily
    // smaller than the output of CompressionMode.FAST
    assertTrue(compressed.length <= compressed2.length);
    return compressed;
  }

}