Expose the ProcessingDelay property, we'll need it

Author: shana

src/GitHub.Exports.Reactive/Collections/ITrackingCollection.cs

@@ -39,6 +39,10 @@ public interface ITrackingCollection<T> : IDisposable, IList<T> where T : ICopya
         void SetFilter(Func<T, int, IList<T>, bool> filter);
         void AddItem(T item);
         void RemoveItem(T item);
+        /// <summary>
+        /// How long to delay between processing incoming items
+        /// </summary>
+        TimeSpan ProcessingDelay { get; set; }
         event NotifyCollectionChangedEventHandler CollectionChanged;
     }
 }

src/UnitTests/GitHub.App/Models/ModelServiceTests.cs

@@ -437,6 +437,7 @@ public async Task NonExpiredIndexReturnsCache()
 
             await modelService.InsertUser(new AccountCacheItem(user));
             var col = modelService.GetPullRequests(repo);
+            col.ProcessingDelay = TimeSpan.Zero;
 
             var count = 0;
             var evt = new ManualResetEvent(false);
@@ -498,6 +499,7 @@ public async Task ExpiredIndexReturnsLive()
 
             await modelService.InsertUser(new AccountCacheItem(user));
             var col = modelService.GetPullRequests(repo);
+            col.ProcessingDelay = TimeSpan.Zero;
 
             var count = 0;
             var evt = new ManualResetEvent(false);
@@ -559,6 +561,7 @@ public async Task ExpiredIndexClearsItems()
 
             await modelService.InsertUser(new AccountCacheItem(user));
             var col = modelService.GetPullRequests(repo);
+            col.ProcessingDelay = TimeSpan.Zero;
 
             var count = 0;
             var evt = new ManualResetEvent(false);