fe/src/test/java/org/apache/impala/util/CompressionUtilTest.java

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// to you under the Apache License, Version 2.0 (the
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//   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.impala.util;

import com.google.common.base.Strings;
import org.apache.impala.common.JniUtil;
import org.apache.impala.thrift.TCacheJarParams;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.junit.Assert;
import org.junit.Test;

public class CompressionUtilTest {
  private static TBinaryProtocol.Factory protocolFactory_ = new TBinaryProtocol.Factory();

  @Test
  public void testCompressionUtil() throws Exception {
    // Compress and decompress simple strings.
    String[] stringsToTest ={"", "TestString", Strings.repeat("x", 100 * 1024 * 1024)};
    for (String test: stringsToTest) {
      byte[] compressed = CompressionUtil.deflateCompress(test.getBytes());
      byte[] decompressed = CompressionUtil.deflateDecompress(compressed);
      Assert.assertEquals(new String(decompressed), test);
    }

    // Compress and decompress a thrift struct.
    TCacheJarParams testObject = new TCacheJarParams("test string");
    byte[] testObjBytes = JniUtil.serializeToThrift(testObject, protocolFactory_);

    byte[] compressed = CompressionUtil.deflateCompress(testObjBytes);
    byte[] decompressed = CompressionUtil.deflateDecompress(compressed);

    TCacheJarParams deserializedTestObj = new TCacheJarParams();
    JniUtil.deserializeThrift(protocolFactory_, deserializedTestObj, decompressed);
    Assert.assertEquals(deserializedTestObj.hdfs_location, "test string");
  }

}