private void checkContains(Pail pail, String file, byte[]... expected) throws Exception {
RecordInputStream is = pail.openRead(file);
List<byte[]> records = new ArrayList<byte[]>();
while(true) {
byte[] arr = is.readRawRecord();
if(arr==null) break;
records.add(arr);
}
assertEquals(expected.length, records.size());
for(int i=0; i < expected.length; i++) {