@Before
  public void openFileSystem () throws Exception {
    conf = new Configuration();
    if(zeroCopy) {
      conf.setBoolean(OrcConf.USE_ZEROCOPY.getHiveConfName(), zeroCopy);
    }
    fs = FileSystem.getLocal(conf);
    testFilePath = new Path(workDir, "TestOrcFile." +
        testCaseName.getMethodName() + ".orc");
    fs.delete(testFilePath, false);
  }
Tests for the top level reader/streamFactory of ORC files.
ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestOrcFile.java