Add test cases

Source/ProofOfConcept/Services/MessageProcessor.cs

@@ -7,12 +7,7 @@ using SzakatsA.Result;
 
 namespace ProofOfConcept.Services;
 
-public interface IMessageProcessor
-{
-    Task ProcessMessage(string vin, string field, string value);
-}
-
-public class MessageProcessor : IMessageProcessor
+public class MessageProcessor
 {
     private readonly ILogger<MessageProcessor> logger;
     private MessageProcessorConfiguration configuration;
@@ -89,7 +84,7 @@ public class MessageProcessor : IMessageProcessor
             await StopParkingAsync(vin);
     }
     
-    private async Task StartParkingAsync(string vin)
+    public async Task StartParkingAsync(string vin)
     {
         this.logger.LogTrace("Start parking for {vin}...", vin);
         
@@ -130,7 +125,7 @@ public class MessageProcessor : IMessageProcessor
             this.logger.LogError(zoneLookupResult.Exception, "Can't start parking: error while determining parking zone");
     }
 
-    private async Task StopParkingAsync(string vin)
+    public async Task StopParkingAsync(string vin)
     {
         this.logger.LogTrace("Stopping parking for {vin}...", vin);