Use innerException for Task.AsUniTask

src/UniTask.NetCoreTests/TaskExtensionsTest.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Threading.Tasks;
+using Cysharp.Threading.Tasks;
+using Xunit;
+
+namespace NetCoreTests
+{
+    public class TaskExtensionsTest
+    {
+        [Fact]
+        public async Task PropagateException()
+        {
+            await Assert.ThrowsAsync<InvalidOperationException>(async () =>
+            {
+                await ThrowAsync().AsUniTask();
+            });
+            
+            await Assert.ThrowsAsync<InvalidOperationException>(async () =>
+            {
+                await ThrowOrValueAsync().AsUniTask();
+            });
+            
+
+            await Assert.ThrowsAsync<InvalidOperationException>(async () =>
+            {
+                await Task.WhenAll(ThrowAsync(), ThrowAsync(), ThrowAsync());
+            });
+        }
+        
+        async Task ThrowAsync()
+        {
+            throw new InvalidOperationException();
+        }
+
+        async Task<int> ThrowOrValueAsync()
+        {
+            throw new InvalidOperationException();
+        }
+   }
+}