fix: Restore threading tests

Author: jeromelaban

build/ci/stage-build-linux-tests.yml

@@ -66,7 +66,6 @@ jobs:
         "$(build.sourcesdirectory)/src/Uno.Wasm.Threads/bin/Release/net9.0/publish/wwwroot" \
         "$(build.sourcesdirectory)/src/Uno.Wasm.Threading.UITests" "http://localhost:8000/"
     displayName: Threading UI Tests 
-    condition: eq( variables['THREAD_TESTING'], 'true' )
     env:
       BUILD_SOURCESDIRECTORY: "$(build.sourcesdirectory)"
 
@@ -82,7 +81,6 @@ jobs:
         "$(build.sourcesdirectory)/src/Uno.Wasm.Threads.Aot/bin/Release/net9.0/publish/wwwroot" \
         "$(build.sourcesdirectory)/src/Uno.Wasm.Threading.UITests" "http://localhost:8000/"
     displayName: Threading AOT UI Tests 
-    condition: eq( variables['THREAD_TESTING'], 'true' )
     env:
       BUILD_SOURCESDIRECTORY: "$(build.sourcesdirectory)"
 

build/ci/stage-build-windows-tests.yml

@@ -241,7 +241,6 @@ jobs:
       "http://localhost:8000/"
 
     displayName: Threading Tests
-    condition: eq( variables['THREAD_TESTING'], 'true' )
     env:
       BUILD_SOURCESDIRECTORY: "$(build.sourcesdirectory)"
 
@@ -258,7 +257,6 @@ jobs:
       "$(build.sourcesdirectory)\src\Uno.Wasm.Threading.UITests" `
       "http://localhost:8000/"
     displayName: Threading AOT Tests
-    condition: eq( variables['THREAD_TESTING'], 'true' )
     env:
       BUILD_SOURCESDIRECTORY: "$(build.sourcesdirectory)"
 

src/Uno.Wasm.Threads.Shared/Program.cs

@@ -34,13 +34,15 @@ public static class Program
 		private static List<string> _messages = new List<string>();
 		private static bool _mainThreadInvoked = false;
 		private static Timer _timer;
+		private static SynchronizationContext _jsContext = SynchronizationContext.Current;
 
 		static void Main()
 		{
 			var runtimeMode = Environment.GetEnvironmentVariable("UNO_BOOTSTRAP_MONO_RUNTIME_MODE");
 			Console.WriteLine($"Runtime Version: " + RuntimeInformation.FrameworkDescription);
 			Console.WriteLine($"Runtime Mode: " + runtimeMode);
 			Console.WriteLine($"TID: {Thread.CurrentThread.ManagedThreadId}");
+			Console.WriteLine($"SynchronizationContext: {_jsContext}");
 
 			Runtime.InvokeJS("Interop.appendResult('Startup')");
 
@@ -92,34 +94,29 @@ void DoWork(string name)
 
 					if ((i % 2000) == 0)
 					{
-						WebAssembly.JSInterop.InternalCalls.InvokeOnMainThread();
+						Console.WriteLine("InvokeOnMainThread1");
+						_jsContext.Post(_ => MainThreadCallback(), null);
 					}
 				}
 			}
 
+#pragma warning disable CA1416 // Validate platform compatibility
 			new Thread(_ =>
 			{
 				Console.WriteLine($"Starting thread [tid:{Thread.CurrentThread.ManagedThreadId}]");
 
-				WebAssembly.JSInterop.InternalCalls.InvokeOnMainThread();
+				_jsContext.Post(_ => MainThreadCallback(), null);
+				Console.WriteLine("InvokeOnMainThread2");
 
 				DoWork("thread1");
 				tcs.TrySetResult(true);
 				Console.WriteLine($"Stopping thread [tid:{Thread.CurrentThread.ManagedThreadId}]");
 			}).Start();
+#pragma warning restore CA1416 // Validate platform compatibility
 
 			await tcs.Task;
 
 			_event.Set();
 		}
 	}
 }
-
-namespace WebAssembly.JSInterop
-{
-	public static class InternalCalls
-	{
-		[MethodImplAttribute(MethodImplOptions.InternalCall)]
-		public static extern void InvokeOnMainThread();
-	}
-}

src/Uno.Wasm.Threads.Shared/WasmScripts/test.js

@@ -9,10 +9,3 @@ var Interop = {
         parent.appendChild(txt, parent.lastChild);
     }
 };
-
-var DotNet = {
-    invokeOnMainThread: function (str) {
-        let getApplyUpdateCapabilitiesMethod = BINDING.bind_static_method("[Uno.Wasm.Threads] Uno.Wasm.Sample.Program:MainThreadCallback");
-        getApplyUpdateCapabilitiesMethod();
-    }
-}