Capture LoggedTest.Initialize exception and re-trow in Dispose (#770)

src/Testing/src/LoggedTest/LoggedTestBase.cs

@@ -5,6 +5,7 @@ using System;
 using System.Linq;
 using System.Reflection;
 using System.Runtime.CompilerServices;
+using System.Runtime.ExceptionServices;
 using Microsoft.Extensions.DependencyInjection;
 using Xunit.Abstractions;
 
@@ -12,6 +13,8 @@ namespace Microsoft.Extensions.Logging.Testing
 {
     public class LoggedTestBase : ILoggedTest
     {
+        private ExceptionDispatchInfo _initializationException;
+
         private IDisposable _testLog;
 
         // Obsolete but keeping for back compat
@@ -47,6 +50,8 @@ namespace Microsoft.Extensions.Logging.Testing
         }
 
         public virtual void Initialize(MethodInfo methodInfo, object[] testMethodArguments, ITestOutputHelper testOutputHelper)
+        {
+            try
             {
                 TestOutputHelper = testOutputHelper;
 
@@ -78,7 +83,16 @@ namespace Microsoft.Extensions.Logging.Testing
                 LoggerFactory = loggerFactory;
                 Logger = loggerFactory.CreateLogger(classType);
             }
+            catch (Exception e)
+            {
+                _initializationException = ExceptionDispatchInfo.Capture(e);
+            }
+        }
 
-        public virtual void Dispose() => _testLog.Dispose();
+        public virtual void Dispose()
+        {
+            _initializationException?.Throw();
+            _testLog.Dispose();
+        }
     }
 }