Fix test error from addition of WorkItemMetrics

src/MigrationTools.Shadows/ServiceCollectionExtensions.cs

@@ -1,4 +1,5 @@
-using Microsoft.Extensions.DependencyInjection;
+using System.Diagnostics.Metrics;
+using Microsoft.Extensions.DependencyInjection;
 using MigrationTools.Clients;
 using MigrationTools.Clients.Shadows;
 using MigrationTools.Services;
@@ -32,6 +33,11 @@ public static void AddMigrationToolServicesForUnitTests(this IServiceCollection
             context.AddSingleton<ITelemetryLogger, TelemetryLoggerFake>();
             context.AddSingleton<IMigrationToolVersion, FakeMigrationToolVersion>();
             context.AddSingleton<IWorkItemQueryBuilderFactory, WorkItemQueryBuilderFactoryFake>();
+
+
+            // Meters
+            context.AddSingleton<IMeterFactory, MeterFactoryFake>();
+            context.AddSingleton<WorkItemMetrics>();
         }
     }
 }

src/MigrationTools.Shadows/Services/MeterFactoryFake.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.Metrics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MigrationTools.Services.Shadows
+{
+    public class MeterFactoryFake : IMeterFactory
+    {
+        public Meter Create(MeterOptions options)
+        {
+            return new Meter(options);
+        }
+
+        public void Dispose()
+        {
+            // do nothing
+        }
+    }
+}

src/MigrationTools/Services/WorkItemMetrics.cs

@@ -17,7 +17,7 @@ public class WorkItemMetrics
 
         public Histogram<double> RevisionsPerWorkItem { get; private set; }
 
-        public WorkItemMetrics(IMeterFactory meterFactory, IConfiguration configuration)
+        public WorkItemMetrics(IMeterFactory meterFactory)
         {
             WorkItemMeter = meterFactory.Create(meterName);
             WorkItemsProcessedCount = WorkItemMeter.CreateCounter<long>("work_items_processed_total");