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Show type load exception on the startup error page

This commit is contained in:
Victor Hurdugaci 2015-10-28 12:12:37 -07:00
parent 54451cb6fa
commit 0b14bc135b
3 changed files with 52 additions and 0 deletions
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15
src/Microsoft.AspNet.Hosting/Startup/StartupExceptionPage.cs
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@ -508,6 +508,21 @@ namespace Microsoft.AspNet.Hosting.Startup
private static IEnumerable<Exception> FlattenAndReverseExceptionTree(Exception ex)
{
// ReflectionTypeLoadException is special because the details are in
// a the LoaderExceptions property
var typeLoadException = ex as ReflectionTypeLoadException;
if (typeLoadException != null)
{
var typeLoadExceptions = new List<Exception>();
foreach (Exception loadException in typeLoadException.LoaderExceptions)
{
typeLoadExceptions.AddRange(FlattenAndReverseExceptionTree(loadException));
}
typeLoadExceptions.Add(ex);
return typeLoadExceptions;
}
var list = new List<Exception>();
while (ex != null)
{

25
test/Microsoft.AspNet.Hosting.Tests/Fakes/StartupThrowTypeLoadException.cs Normal file
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@ -0,0 +1,25 @@
// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.IO;
using System.Reflection;
namespace Microsoft.AspNet.Hosting.Fakes
{
public class StartupThrowTypeLoadException
{
public StartupThrowTypeLoadException()
{
// For this exception, the error page should contain details of the LoaderExceptions
throw new ReflectionTypeLoadException(
classes: new Type[] { GetType() },
exceptions: new Exception[] { new FileNotFoundException("Message from the LoaderException") },
message: "This should not be in the output");
}
public void Configure()
{
}
}
}

12
test/Microsoft.AspNet.Hosting.Tests/WebHostBuilderTests.cs
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@ -74,6 +74,18 @@ namespace Microsoft.AspNet.Hosting
}
}
[Fact]
public async Task StartupCtorThrows_TypeLoadException()
{
var builder = CreateWebHostBuilder();
var serverFactory = new TestServerFactory();
var engine = builder.UseServer(serverFactory).UseStartup<StartupThrowTypeLoadException>().Build();
using (engine.Start())
{
await AssertResponseContains(serverFactory.Application, "Message from the LoaderException</span>");
}
}
[Fact]
public async Task IApplicationLifetimeRegisteredEvenWhenStartupCtorThrows_Fallback()
{