// this due to the way revisions are generated.
public void immutableRevisions() throws IOException, NigoriCryptographyException,
UnauthorisedException {
NigoriDatastore nigori = getStore();
try {
assertTrue("Not registered", nigori.register());
final Index index = new Index("index");
final Revision revision = new Revision("rev");
assertTrue("Not put", nigori.put(index, revision, Util.int2bin(0)));
assertFalse("Could replace revision value", nigori.put(index, revision, Util.int2bin(1)));
nigori.delete(index, NULL_DELETE_TOKEN);