fix: mark more parts of code .net 6 only

Author: egil

src/TimeScheduler/PeriodicTimer.cs

@@ -1,3 +1,4 @@
+#if NET6_0_OR_GREATER
 namespace TimeScheduler;
 
 /// <summary>Provides a periodic timer that enables waiting asynchronously for timer ticks.</summary>
@@ -44,3 +45,4 @@ protected virtual void Dispose(bool disposing)
     {
     }
 }
+#endif

src/TimeScheduler/System/Threading/Tasks/TimeProviderTaskExtensions.cs

@@ -25,6 +25,7 @@ public DelayState() : base() { }
         public CancellationTokenRegistration Registration { get; set; }
     }
 
+#if NET6_0_OR_GREATER
     private sealed class WaitAsyncState : TaskCompletionSource<bool>
     {
         // The original code passed TaskCreationOptions.RunContinuationsAsynchronously to the base constructor,
@@ -36,6 +37,7 @@ public WaitAsyncState() : base() { }
         public CancellationTokenRegistration Registration;
         public ITimer? Timer;
     }
+#endif
 
     /// <summary>Creates a task that completes after a specified time interval.</summary>
     /// <param name="timeProvider">The <see cref="TimeProvider"/> with which to interpret <paramref name="delay"/>.</param>
@@ -106,6 +108,8 @@ public static Task Delay(this TimeProvider timeProvider, TimeSpan delay, Cancell
         return state.Task;
     }
 
+#if NET6_0_OR_GREATER
+
     /// <summary>
     /// Gets a <see cref="Task"/> that will complete when this <see cref="Task"/> completes, when the specified timeout expires, or when the specified <see cref="CancellationToken"/> has cancellation requested.
     /// </summary>
@@ -223,6 +227,8 @@ public static async Task<TResult> WaitAsync<TResult>(this Task<TResult> task, Ti
         return task.Result;
 #pragma warning restore CA1849 // Call async methods when in an async method
     }
+
+#endif
 }
 #pragma warning restore CS8602 // Dereference of a possibly null reference.
 #pragma warning restore CS8600 // Converting null literal or possible null value to non-nullable type.

src/TimeScheduler/Testing/TestScheduler.Timer.cs

@@ -77,15 +77,13 @@ public void Dispose()
             stopTimerCts.Dispose();
         }
 
+#if NET6_0_OR_GREATER
         public ValueTask DisposeAsync()
         {
             Dispose();
-#if NET6_0_OR_GREATER
             return ValueTask.CompletedTask;
-#else
-            return new ValueTask(Task.CompletedTask);
-#endif
         }
+#endif
 
         private void TimerElapsed()
         {

src/TimeScheduler/TimeScheduler.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <TargetFrameworks>net6.0;netstandard2.0</TargetFrameworks>
     <Title>Scheduler</Title>
-    <Version>0.7.0</Version>
+    <Version>0.7.1</Version>
     <Company>Egil Hansen</Company>
     <Authors>Egil Hansen</Authors>
     <Description>

test/TimeScheduler.Tests/System/Testing/ManualTimeProviderTests.cs

@@ -23,4 +23,25 @@ public void SetUtcNow_updates_UtcNow()
 
         sut.GetUtcNow().Should().Be(startTime + TimeSpan.FromTicks(1));
     }
+
+    [Fact]
+    public void Callbacks_runs_synchronously()
+    {
+        // arrange
+        var sut = new ManualTimeProvider();
+        var callbackCount = 0;
+        _ = Continuation(sut, () => callbackCount++);
+
+        // act
+        sut.ForwardTime(TimeSpan.FromSeconds(10));
+
+        // assert
+        callbackCount.Should().Be(1);
+
+        static async Task Continuation(TimeProvider timeProvider, Action callback)
+        {
+            await timeProvider.Delay(TimeSpan.FromSeconds(10));
+            callback();
+        }
+    }
 }

test/TimeScheduler.Tests/System/Testing/ManualTimeProviderWaitAsyncTests.cs

@@ -1,3 +1,4 @@
+#if NET6_0_OR_GREATER
 namespace System.Testing;
 
 public class ManualTimeProviderWaitAsyncTests
@@ -203,3 +204,4 @@ await task.Awaiting(x => x)
             .ThrowExactlyAsync<TaskCanceledException>();
     }
 }
+#endif

test/TimeScheduler.Tests/TimeScheduler.Tests.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net6.0;netcoreapp3.1</TargetFrameworks>
-    <LangVersion>11.0</LangVersion>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>