unit tests for API (99% coverage)

MalwareMultiScan.Api/Services/Implementations/ReceiverHostedService.cs

@@ -0,0 +1,58 @@
+using System.Threading;
+using System.Threading.Tasks;
+using EasyNetQ;
+using MalwareMultiScan.Api.Services.Interfaces;
+using MalwareMultiScan.Backends.Messages;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+
+namespace MalwareMultiScan.Api.Services.Implementations
+{
+    public class ReceiverHostedService : IReceiverHostedService
+    {
+        private readonly IBus _bus;
+        private readonly IConfiguration _configuration;
+        private readonly ILogger<ReceiverHostedService> _logger;
+        private readonly IScanResultService _scanResultService;
+        
+        public ReceiverHostedService(IBus bus, IConfiguration configuration, IScanResultService scanResultService,
+            ILogger<ReceiverHostedService> logger)
+        {
+            _bus = bus;
+            _configuration = configuration;
+            _scanResultService = scanResultService;
+            _logger = logger;
+        }
+        
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            _bus.Receive<ScanResultMessage>(_configuration.GetValue<string>("ResultsSubscriptionId"), async message =>
+            {
+                message.Threats ??= new string[] { };
+                
+                _logger.LogInformation(
+                    $"Received a result from {message.Backend} for {message.Id} " +
+                    $"with threats {string.Join(",", message.Threats)}");
+
+                await _scanResultService.UpdateScanResultForBackend(
+                    message.Id, message.Backend, message.Duration, true,
+                    message.Succeeded, message.Threats);
+            });
+
+            _logger.LogInformation(
+                "Started hosted service for receiving scan results");
+
+            return Task.CompletedTask;
+        }
+        
+        public Task StopAsync(CancellationToken cancellationToken)
+        {
+            _bus?.Dispose();
+
+            _logger.LogInformation(
+                "Stopped hosted service for receiving scan results");
+
+            return Task.CompletedTask;
+        }
+    }
+}