Bind restore to committed remote snapshots

internal/adapters/storage/fake.go

@@ -23,11 +23,12 @@ type FakeBackend struct {
 	Uploads   []FakeUploadCall
 	Downloads []FakeDownloadCall
 
-	ListErr     error
-	DownloadErr error
-	UploadErr   error
-	ExistsErr   error
-	UploadHook  func(FakeUploadCall) error
+	ListErr      error
+	DownloadErr  error
+	UploadErr    error
+	ExistsErr    error
+	UploadHook   func(FakeUploadCall) error
+	DownloadHook func(FakeDownloadCall) error
 }
 
 // FakeUploadCall captures one upload invocation in call order.
@@ -139,6 +140,11 @@ func (f *FakeBackend) DownloadTo(ctx context.Context, key string, destination io
 	if destination == nil {
 		return fmt.Errorf("download object: destination writer is required")
 	}
+	if f.DownloadHook != nil {
+		if err := f.DownloadHook(FakeDownloadCall{Key: normalizeObjectKey(key)}); err != nil {
+			return err
+		}
+	}
 
 	_, source, err := f.Read(ctx, key)
 	if err != nil {