public void When() { // given var tagger = new TransactionFilePositionTagger(0); var positionTracker = new PositionTracker(tagger); var newTag = CheckpointTag.FromPosition(0, 100, 50); positionTracker.UpdateByCheckpointTagInitial(newTag); _tag = positionTracker.LastTag; _tagger = new TransactionFilePositionTagger(0); _positionTracker = new PositionTracker(_tagger); _positionTracker.UpdateByCheckpointTagInitial(_tag); // when _positionTracker.Initialize(); }