Added testing before sending

FitConnect/Sender.cs

@@ -74,7 +74,7 @@ public class Sender : FitConnectClient, ISender, ISenderWithDestination,
         Submission!.Data = data;
         return this;
     }
-    
+
     public Submission? Submission { get; set; }
 
     Submission ISenderReady.Submit() {
@@ -85,6 +85,13 @@ public class Sender : FitConnectClient, ISender, ISenderWithDestination,
 
         var metadata = CreateMetadata(Submission);
         Logger?.LogTrace("MetaData: {metadata}", metadata);
+        var validationErrors = Subscriber.VerifyMetadata(metadata);
+        if (validationErrors.Count != 0) {
+            validationErrors.ToList().ForEach(v => Logger?.LogError("Validation error: {error}", v));
+            Logger?.LogError("Sending submission aborted due to validation errors");
+            throw new InvalidOperationException("Submission is not ready");
+        }
+
         Logger?.LogInformation("Sending submission");
         var encryptedMeta = Encryption.Encrypt(metadata);
         Logger?.LogTrace("Encrypted metadata: {encryptedMeta}", encryptedMeta);
@@ -121,8 +128,8 @@ public class Sender : FitConnectClient, ISender, ISenderWithDestination,
     /// <returns></returns>
     public ISenderWithAttachments WithAttachments(params Attachment[] attachments) =>
         WithAttachments(attachments.ToList());
-    
-    
+
+
     /// <summary>
     /// </summary>
     /// <param name="attachments"></param>