@BeforeClass
  public static void setUpBeforeClass() throws Exception {
    Configuration conf = AbstractTestWALReplay.TEST_UTIL.getConfiguration();
    conf.setBoolean(HConstants.ENABLE_WAL_COMPRESSION, true);
    conf.setBoolean(CompressionContext.ENABLE_WAL_VALUE_COMPRESSION, true);
    TestWALReplay.setUpBeforeClass();
  }
Enables compression and runs the TestWALReplay tests.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALReplayValueCompression.java