public void DeleteAllSnapshots()
{
var snapshot1 = new Snapshot(Guid.NewGuid(), 1, new Object());
var snapshot2 = new Snapshot(Guid.NewGuid(), 1, new Object());
SnapshotStore.Save(snapshot1);
SnapshotStore.Save(snapshot2);
SnapshotStore.Purge();
Assert.Equal(0, CountSnapshots());
}