Unable to load test appsettings in integration tests

Is there an existing issue for this?

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Describe the bug

I want to do some condition checks on the Program file (AKA Startup). That condition is dependent on some configuration. I put that configuration in appsettings.josn. In the test project I used different appsettings configurations. But unable to get the value of test configuration.

Expected Behavior

Need to bind the appsettings.json of test project.

Steps To Reproduce

Create a ASP Net Core Web API project selecting .net 6. Uncheck minimal API.

Put this to the program file.

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllers();

var useTests = builder.Configuration.GetValue<bool>("UseTests"); // not binding from test appsettings
if (useTests)
{

}
var app = builder.Build();

app.MapControllers();

app.Run();

public partial class Startup{}

Here is the custom web application factory:

public class CustomWebApplicationFactory<TStartup> : WebApplicationFactory<TStartup> where TStartup : class
    {
        protected override void ConfigureWebHost(IWebHostBuilder builder)
        {
            builder.ConfigureAppConfiguration(config =>
            {
                var projectDir = Directory.GetCurrentDirectory();
                var configPath = Path.Combine(projectDir, "appsettings.json");
                config.AddJsonFile(configPath);
            });
        }
    }

Write a test:

public class UnitTest1 : IClassFixture<CustomWebApplicationFactory<Startup>>
    {
        private readonly CustomWebApplicationFactory<Startup> _factory;
        private readonly HttpClient _client;
        public UnitTest1(CustomWebApplicationFactory<Startup> factory)
        {
            _factory = factory;
        }
        [Fact]
        public void Test1()
        {
            var application = new CustomWebApplicationFactory<Startup>();
            var client = _factory.CreateClient();
            var result = client.GetAsync("WeatherForecast");
            Assert.Equal(true, true);
        }
    }

Exceptions (if any)

No response

.NET Version

6.0.100

Anything else?

No response

[msftbot[bot]]

Thanks for contacting us. We’re moving this issue to the .NET 7 Planning milestone for future evaluation / consideration. Because it’s not immediately obvious that this is a bug in our framework, we would like to keep this around to collect more feedback, which can later help us determine the impact of it. We will re-evaluate this issue, during our next planning meeting(s). If we later determine, that the issue has no community involvement, or it’s very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues. To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

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