/** Test reduce output compression ratio configuration utilities. */
 @Test
 public void testOutputCompressionRatioConfiguration() throws Exception {
   Configuration conf = new Configuration();
   float ratio = 0.567F;
   CompressionEmulationUtil.setReduceOutputCompressionEmulationRatio(conf, ratio);
   assertEquals(
       ratio, CompressionEmulationUtil.getReduceOutputCompressionEmulationRatio(conf), 0.0D);
 }