Add a test that puts all components on an entity and checks for no exceptions (#1815)

* Add test that puts all components on an entity and checks for no exceptions

Also fix all the exceptions that happened because of this

* Add comments to the test

* Fix nullable errors

* Fix more nullable errors

* More nullable error fixes

* Unignore basic actor component

* Fix more nullable errors

* NULLABLE ERROR

* Add string interpolation

* Merge if checks

* Remove redundant pragma warning disable 649

* Address reviews

* Remove null wrappers around TryGetComponent

* Merge conflict fixes

* APC battery component error fix

* Fix power test

* Fix atmos mapgrid usages

Content.Server/GameObjects/EntitySystems/AI/AiSystem.cs

@@ -24,17 +24,17 @@ namespace Content.Server.GameObjects.EntitySystems.AI
         [Dependency] private readonly IReflectionManager _reflectionManager = default!;
 
         private readonly Dictionary<string, Type> _processorTypes = new Dictionary<string, Type>();
-        
+
         /// <summary>
         ///     To avoid iterating over dead AI continuously they can wake and sleep themselves when necessary.
         /// </summary>
         private readonly HashSet<AiLogicProcessor> _awakeAi = new HashSet<AiLogicProcessor>();
-        
+
         // To avoid modifying awakeAi while iterating over it.
         private readonly List<SleepAiMessage> _queuedSleepMessages = new List<SleepAiMessage>();
 
         public bool IsAwake(AiLogicProcessor processor) => _awakeAi.Contains(processor);
-        
+
         /// <inheritdoc />
         public override void Initialize()
         {
@@ -66,9 +66,9 @@ namespace Content.Server.GameObjects.EntitySystems.AI
                         break;
                 }
             }
-            
+
             _queuedSleepMessages.Clear();
-            
+
             foreach (var processor in _awakeAi)
             {
                 processor.Update(frameTime);
@@ -87,7 +87,7 @@ namespace Content.Server.GameObjects.EntitySystems.AI
         /// <param name="controller"></param>
         public void ProcessorInitialize(AiControllerComponent controller)
         {
-            if (controller.Processor != null) return;
+            if (controller.Processor != null || controller.LogicName == null) return;
             controller.Processor = CreateProcessor(controller.LogicName);
             controller.Processor.SelfEntity = controller.Owner;
             controller.Processor.Setup();

Content.Server/GameObjects/EntitySystems/Atmos/GasTileOverlaySystem.cs

@@ -153,13 +153,20 @@ namespace Content.Server.GameObjects.EntitySystems.Atmos
         private bool TryRefreshTile(GridAtmosphereComponent gam, GasOverlayData oldTile, MapIndices indices, out GasOverlayData overlayData)
         {
             var tile = gam.GetTile(indices);
+
+            if (tile == null)
+            {
+                overlayData = default;
+                return false;
+            }
+
             var tileData = new List<GasData>();
 
             for (byte i = 0; i < Atmospherics.TotalNumberOfGases; i++)
             {
                 var gas = Atmospherics.GetGas(i);
                 var overlay = Atmospherics.GetOverlay(i);
-                if (overlay == null || tile.Air == null) continue;
+                if (overlay == null || tile?.Air == null) continue;
 
                 var moles = tile.Air.Gases[i];
 
@@ -169,7 +176,7 @@ namespace Content.Server.GameObjects.EntitySystems.Atmos
                 tileData.Add(data);
             }
 
-            overlayData = new GasOverlayData(tile.Hotspot.State, tile.Hotspot.Temperature, tileData.Count == 0 ? null : tileData.ToArray());
+            overlayData = new GasOverlayData(tile!.Hotspot.State, tile.Hotspot.Temperature, tileData.Count == 0 ? null : tileData.ToArray());
 
             if (overlayData.Equals(oldTile))
             {

Content.Server/GameObjects/EntitySystems/MoverSystem.cs

@@ -30,13 +30,11 @@ namespace Content.Server.GameObjects.EntitySystems
     [UsedImplicitly]
     internal class MoverSystem : SharedMoverSystem
     {
-#pragma warning disable 649
         [Dependency] private readonly IPauseManager _pauseManager = default!;
         [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
         [Dependency] private readonly ITileDefinitionManager _tileDefinitionManager = default!;
         [Dependency] private readonly IMapManager _mapManager = default!;
         [Dependency] private readonly IRobustRandom _robustRandom = default!;
-#pragma warning restore 649
 
         private AudioSystem _audioSystem = default!;