// app should create a single SequenceFile named "chunk-0" in the output dir
FileStatus[] fileStatuses = fs.listStatus(mrOutputDir.suffix("/part-m-00000"));
assertEquals(1, fileStatuses.length); // only one
assertEquals("part-m-00000", fileStatuses[0].getPath().getName());
SequenceFileIterator<Text, Text> iterator =
new SequenceFileIterator<Text, Text>(mrOutputDir.suffix("/part-m-00000"), true, configuration);
Assert.assertTrue("First key/value pair not found!", iterator.hasNext());
Pair<Text, Text> record = iterator.next();
File parentFileSubSubDir = new File(new File(new File(new File("TEST"), "subdir"), "subsubdir"), "mail-messages-2.gz");