TestZstdWrapper.java

package com.xiaomi.infra.pegasus.tools;

import com.xiaomi.infra.pegasus.client.PException;
import com.xiaomi.infra.pegasus.client.PegasusClientFactory;
import com.xiaomi.infra.pegasus.client.PegasusClientInterface;
import com.xiaomi.infra.pegasus.client.PegasusTableInterface;
import org.junit.Assert;
import org.junit.Test;

public class TestZstdWrapper {
  @Test
  public void testCompression() throws Exception {
    PegasusClientInterface client = PegasusClientFactory.getSingletonClient();
    PegasusTableInterface table = client.openTable("temp");

    for (int t = 0; t < 4; t++) {
      // generate a 10KB value
      StringBuilder builder = new StringBuilder();
      for (int i = 0; i < 10000; i++) {
        builder.append('a' + t);
      }
      byte[] value = builder.toString().getBytes();

      // write the record into pegasus
      table.set("h".getBytes(), "s".getBytes(), ZstdWrapper.compress(value), 1000);

      // read the record from pegasus
      byte[] compressedBuf = table.get("h".getBytes(), "s".getBytes(), 1000);

      // decompress the value
      Assert.assertArrayEquals(ZstdWrapper.decompress(compressedBuf), value);
    }

    // ensure empty value won't break the program
    {
      try {
        ZstdWrapper.decompress("".getBytes());
        Assert.fail("expecting a IllegalArgumentException");
      } catch (Exception e) {
        Assert.assertTrue(e instanceof IllegalArgumentException);
      }
      try {
        ZstdWrapper.decompress(null);
        Assert.fail("expecting a IllegalArgumentException");
      } catch (Exception e) {
        Assert.assertTrue(e instanceof IllegalArgumentException);
      }
    }

    { // decompress invalid data
      try {
        ZstdWrapper.decompress("abc123".getBytes());
        Assert.fail("expecting a PException");
      } catch (Exception e) {
        Assert.assertTrue(e instanceof PException);
      }
    }
  }
}