Use UsingSnapshotting property during recovery (#2244)

Author: rogeralsing

src/Proto.Persistence/Persistence.cs

@@ -45,8 +45,8 @@ private Persistence(
     /// </summary>
     public long Index { get; private set; } = -1;
 
-    private bool UsingSnapshotting => _applySnapshot is not null; //TODO: why not used?
-    private bool UsingEventSourcing => _applyEvent is not null;
+    private bool UsingSnapshotting => _applySnapshot is not null;
+    private bool UsingEventSourcing => _applyEvent is not null;
 
     /// <summary>
     ///     Initializes <see cref="Persistence" /> with event storing only.
@@ -216,13 +216,13 @@ Func<object> getSnapshot
     /// <returns></returns>
     public async Task RecoverStateAsync()
     {
-        var (snapshot, lastSnapshotIndex) = await _snapshotStore.GetSnapshotAsync(_actorId).ConfigureAwait(false);
-
-        if (snapshot is not null && _applySnapshot is not null)
-        {
-            Index = lastSnapshotIndex;
-            _applySnapshot(new RecoverSnapshot(snapshot, lastSnapshotIndex));
-        }
+        var (snapshot, lastSnapshotIndex) = await _snapshotStore.GetSnapshotAsync(_actorId).ConfigureAwait(false);
+
+        if (snapshot is not null && UsingSnapshotting)
+        {
+            Index = lastSnapshotIndex;
+            _applySnapshot!(new RecoverSnapshot(snapshot, lastSnapshotIndex));
+        }
 
         var fromEventIndex = Index + 1;