WebApplicationFactory<T>.CreateClient() fails when using app.Urls.Add() in minimal api. #39777

drch- · 2022-01-26T14:44:14Z

Is there an existing issue for this?

I have searched the existing issues

Describe the bug

A minimal api that uses app.Urls.Add() throws an exception when under test with a WebApplicationFactory. The following example shows a minimal repro.

Removing the app.Urls.Add() works fine and the test passes.

// Program.cs
var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

var port = Environment.GetEnvironmentVariable("PORT") ?? "8080";
app.Urls.Add($"http://0.0.0.0:{port}");

app.MapGet("/", () => "hello world");
app.Run();

public partial class Program { }

// UnitTest1.cs xunit v2.4.1
[Fact]
public async Task TestAppRunning()
{
    var app = new WebApplicationFactory<Program>();
    var client = app.CreateClient(); // throws InvalidOperationException
    var response = await client.GetAsync("/");
    Assert.Equal(HttpStatusCode.OK, response.StatusCode);
}

Expected Behavior

No response

Steps To Reproduce

No response

Exceptions (if any)

[xUnit.net 00:00:01.02]     test.UnitTest1.TestAppRunning [FAIL]
  Failed test.UnitTest1.TestAppRunning [94 ms]
  Error Message:
   System.InvalidOperationException : IServerAddressesFeature could not be found.
  Stack Trace:
     at Microsoft.AspNetCore.Builder.WebApplication.get_Urls()
   at Program.<Main>$(String[] args) in Program.cs:line 5
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Testing.DeferredHostBuilder.DeferredHost.StartAsync(CancellationToken cancellationToken)
   at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Start(IHost host)
   at Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory`1.CreateHost(IHostBuilder builder)
   at Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory`1.ConfigureHostBuilder(IHostBuilder hostBuilder)
   at Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory`1.EnsureServer()
   at Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory`1.CreateDefaultClient(DelegatingHandler[] handlers)
   at Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory`1.CreateDefaultClient(Uri baseAddress, DelegatingHandler[] handlers)
   at Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory`1.CreateClient(WebApplicationFactoryClientOptions options)
   at Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory`1.CreateClient()
   at test.UnitTest1.TestAppRunning() in UnitTest1.cs:line 23
--- End of stack trace from previous location ---

.NET Version

6.0.101

Anything else?

.NET SDK (reflecting any global.json):
Version: 6.0.101
Commit: ef49f6213a

Runtime Environment:
OS Name: debian
OS Platform: Linux
RID: linux-x64

Host (useful for support):
Version: 6.0.1
Commit: 3a25a7f1cc

.NET SDKs installed:
6.0.101

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.1
Microsoft.NETCore.App 6.0.1

The text was updated successfully, but these errors were encountered:

Dec	JAN	Feb
	26
2021	2022	2023

dotnet / aspnetcore Public

WebApplicationFactory<T>.CreateClient() fails when using app.Urls.Add() in minimal api. #39777

WebApplicationFactory<T>.CreateClient() fails when using app.Urls.Add() in minimal api. #39777

drch- commented Jan 26, 2022

dotnet / aspnetcore Public

WebApplicationFactory<T>.CreateClient() fails when using app.Urls.Add() in minimal api. #39777

WebApplicationFactory<T>.CreateClient() fails when using app.Urls.Add() in minimal api. #39777

Comments

drch- commented Jan 26, 2022

Is there an existing issue for this?

Describe the bug

Expected Behavior

Steps To Reproduce

Exceptions (if any)

.NET Version

Anything else?