complete infrastructure

Assets/Scenes/SandboxMain.cs

@@ -3,6 +3,7 @@ using System.Collections;
 using System.Collections.Generic;
 using System.IO;
 using System.Threading;
+using System.Threading.Tasks;
 using UniRx.Async;
 using UnityEngine;
 using UnityEngine.Networking;
@@ -12,15 +13,111 @@ public class SandboxMain : MonoBehaviour
 {
     public Button okButton;
     public Button cancelButton;
+    public Text text;
+
     CancellationTokenSource cts;
 
-    async void Start()
+    UniTaskCompletionSource2 ucs;
+
+    void Start()
     {
-        UnityEngine.Debug.Log("DOWNLOAD START:" + Time.frameCount);
+        // Setup unobserverd tskexception handling
+        TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;
 
-        var req = await UnityWebRequest.Get(Path.Combine(Application.streamingAssetsPath, "test.txt")).SendWebRequest();
+        // Optional: disable ExecutionContext if you don't use AsyncLocal.
+        //if (!ExecutionContext.IsFlowSuppressed())
+        //{
+        //    ExecutionContext.SuppressFlow();
+        //}
 
-        UnityEngine.Debug.Log("DOWNLOAD RESULT:" + Time.frameCount + ", " + req.downloadHandler.text);
+        //// Optional: disable SynchronizationContext(to boostup performance) if you completely use UniTask only
+        //SynchronizationContext.SetSynchronizationContext(null);
+
+        // -----
+
+        Application.logMessageReceived += Application_logMessageReceived;
+
+
+        ucs = new UniTaskCompletionSource2();
+
+        okButton.onClick.AddListener(UniTask.VoidUnityAction(async () =>
+        {
+            await OuterAsync(true);
+        }));
+
+        cancelButton.onClick.AddListener(async () =>
+        {
+            text.text = "";
+
+            ucs.SetResult();
+
+            await ucs.Task;
+        });
+    }
+
+    private void Application_logMessageReceived(string condition, string stackTrace, LogType type)
+    {
+        text.text += "\n" + condition;
+    }
+
+    async UniTask2 OuterAsync(bool b)
+    {
+        UnityEngine.Debug.Log("START OUTER");
+
+        await InnerAsync(b);
+        await InnerAsync(b);
+
+        UnityEngine.Debug.Log("END OUTER");
+
+        // throw new InvalidOperationException("NAZO ERROR!?"); // error!?
+    }
+
+    async UniTask2 InnerAsync(bool b)
+    {
+        if (b)
+        {
+            UnityEngine.Debug.Log("Start delay:" + Time.frameCount);
+            await UniTask2.DelayFrame(60);
+            UnityEngine.Debug.Log("End delay:" + Time.frameCount);
+            await UniTask2.DelayFrame(60);
+            UnityEngine.Debug.Log("Onemore end delay:" + Time.frameCount);
+        }
+        else
+        {
+            //UnityEngine.Debug.Log("Empty END");
+        }
+    }
+
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+
+    private void TaskScheduler_UnobservedTaskException(object sender, UnobservedTaskExceptionEventArgs e)
+    {
+        // e.SetObserved();
+        // or other custom write code.
+        UnityEngine.Debug.LogError("Unobserved:" + e.Exception.ToString());
     }
 }