Reusable integration-test helpers for SimpleModule applications.

• TestAuthHandler — header-based test auth handler that turns a semicolon-separated list of type=value claims into an authenticated ClaimsPrincipal.
• TestAuthDefaults — scheme name (TestScheme) and header name (X-Test-Claims) constants.
• services.AddTestAuthentication() — registers the handler as the default authenticate/challenge scheme.
• factory.CreateAuthenticatedClient(params Claim[]) and factory.CreateAuthenticatedClient(string[] permissions, params Claim[]) extensions on WebApplicationFactory<TEntryPoint> that produce HTTP clients with the appropriate X-Test-Claims header.

using SimpleModule.Testing;

public sealed class MyAppFactory : WebApplicationFactory<Program>
{
    protected override void ConfigureWebHost(IWebHostBuilder builder)
    {
        builder.ConfigureServices(services =>
        {
            services.AddTestAuthentication();
        });
    }
}

public sealed class MyEndpointTests(MyAppFactory factory) : IClassFixture<MyAppFactory>
{
    [Fact]
    public async Task Authenticated_request_succeeds()
    {
        var client = factory.CreateAuthenticatedClient(
            new Claim("permission", "Things.View")
        );

        var response = await client.GetAsync("/api/things");

        response.EnsureSuccessStatusCode();
    }
}

This package is intentionally narrow: it ships only the auth-related plumbing. Wire your own WebApplicationFactory for module-specific setup (DB swap, hosted-service removal, etc.).

MIT