Fix ProcScheduler state poisoning between tests

Content.Tests/DMTests.cs

@@ -5,6 +5,7 @@
 using NUnit.Framework;
 using OpenDreamRuntime;
 using OpenDreamRuntime.Objects;
+using OpenDreamRuntime.Procs;
 using OpenDreamRuntime.Rendering;
 using OpenDreamShared.Rendering;
 using Robust.Shared.Asynchronous;
@@ -28,6 +29,7 @@ public sealed class DMTests : ContentUnitTest {
 
         [Dependency] private readonly DreamManager _dreamMan = default!;
         [Dependency] private readonly DreamObjectTree _objectTree = default!;
+        [Dependency] private readonly ProcScheduler _procScheduler = default!;
         [Dependency] private readonly ITaskManager _taskManager = default!;
 
         [Flags]
@@ -138,7 +140,7 @@ public void TestFiles(string sourceFile, DMTestFlags testFlags) {
             watch.Start();
 
             // Tick until our inner call has finished
-            while (!callTask.IsCompleted) {
+            while (!callTask.IsCompleted || _procScheduler.HasProcsQueued || _procScheduler.HasProcsSleeping) {
                 _dreamMan.Update();
                 _taskManager.ProcessPendingTasks();
 

OpenDreamRuntime/Procs/ProcScheduler.Delays.cs

@@ -14,6 +14,8 @@ public sealed partial class ProcScheduler {
     // This is for deferred tasks that need to fire in the current tick.
     private readonly Queue<TaskCompletionSource> _deferredTasks = new();
 
+    public bool HasProcsSleeping => _tickers.Count > 0;
+
     /// <summary>
     /// Create a task that will delay by an amount of time, following the rules for <c>sleep</c> and <c>spawn</c>.
     /// </summary>

OpenDreamRuntime/Procs/ProcScheduler.cs

@@ -26,7 +26,7 @@ public sealed partial class ProcScheduler {
     private readonly Queue<AsyncNativeProc.State> _scheduled = new();
     private AsyncNativeProc.State? _current;
 
-    bool HasProcsQueued => _scheduled.Count > 0 || _deferredTasks.Count > 0;
+    public bool HasProcsQueued => _scheduled.Count > 0 || _deferredTasks.Count > 0;
 
     public Task Schedule(AsyncNativeProc.State state, Func<AsyncNativeProc.State, Task<DreamValue>> taskFunc) {
         async Task Foo() {