m = new Mutation(new Text("0;foo"));
m.put(TabletsSection.BulkFileColumnFamily.NAME, new Text("/someFile"), new Value("5".getBytes()));
m.put(DataFileColumnFamily.NAME, new Text("/someFile"), new Value("1,1".getBytes()));
m.put(TabletsSection.BulkFileColumnFamily.NAME, new Text("/someFile2"), new Value("7".getBytes()));
m.put(DataFileColumnFamily.NAME, new Text("/someFile2"), new Value("1,1".getBytes()));
violations = mc.check(null, m);
assertNotNull(violations);
assertEquals(1, violations.size());
assertEquals(Short.valueOf((short) 8), violations.get(0));
// two files w/ one active txid