From ce9a6bc932cad8f3a38939b93f0179ea58de6f77 Mon Sep 17 00:00:00 2001
From: Markus Ewald <cygon@nuclex.org>
Date: Mon, 22 Jun 2009 18:54:12 +0000
Subject: [PATCH] Added a unit tests that reproduces the bug fixed in the
 previous commit

git-svn-id: file:///srv/devel/repo-conversion/nusu@153 d2e56fa2-650e-0410-a79f-9358c0239efd
---
 Source/Scheduling/Scheduler.Test.cs | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/Source/Scheduling/Scheduler.Test.cs b/Source/Scheduling/Scheduler.Test.cs
index e84c967..3d58533 100644
--- a/Source/Scheduling/Scheduler.Test.cs
+++ b/Source/Scheduling/Scheduler.Test.cs
@@ -207,8 +207,7 @@ namespace Nuclex.Support.Scheduling {
       ITimeSource timeSource = Scheduler.CreateTimeSource(true);
       try {
         Assert.That(timeSource is WindowsTimeSource);
-      }
-      finally {
+      } finally {
         IDisposable disposableTimeSource = timeSource as IDisposable;
         if(disposableTimeSource != null) {
           disposableTimeSource.Dispose();
@@ -224,8 +223,7 @@ namespace Nuclex.Support.Scheduling {
       ITimeSource timeSource = Scheduler.CreateTimeSource(false);
       try {
         Assert.That(timeSource is GenericTimeSource);
-      }
-      finally {
+      } finally {
         IDisposable disposableTimeSource = timeSource as IDisposable;
         if(disposableTimeSource != null) {
           disposableTimeSource.Dispose();
@@ -241,8 +239,7 @@ namespace Nuclex.Support.Scheduling {
       ITimeSource timeSource = Scheduler.CreateDefaultTimeSource();
       try {
         Assert.IsNotNull(timeSource);
-      }
-      finally {
+      } finally {
         IDisposable disposableTimeSource = timeSource as IDisposable;
         if(disposableTimeSource != null) {
           disposableTimeSource.Dispose();
@@ -439,6 +436,25 @@ namespace Nuclex.Support.Scheduling {
       }
     }
 
+    /// <summary>
+    ///   Reproduction case for a bug that occurred when the final notification in
+    ///   the scheduler was cancelled (call to PriorityQueue.Peek() on empty queue)
+    /// </summary>
+    [Test]
+    public void TestCancelFinalNotification() {
+      MockTimeSource mockTimeSource = new MockTimeSource(new DateTime(2010, 1, 1));
+      using(TestSubscriber subscriber = new TestSubscriber()) {
+        using(Scheduler scheduler = new Scheduler(mockTimeSource)) {
+          scheduler.Cancel(
+            scheduler.NotifyIn(TimeSpan.FromHours(12), subscriber.Callback)
+          );
+
+          mockTimeSource.AdvanceTime(TimeSpan.FromHours(14));
+          Thread.Sleep(1);
+        }
+      }
+    }
+
     /// <summary>Returns the provided date/time value as a utc time value</summary>
     /// <param name="dateTime">Date/time value that will be returned as UTC</param>
     /// <returns>The provided date/time value as UTC</returns>