.net core 6 jwt token mocking - unit-testing

Question

I am looking for a tutorial on how to mock authentication tokens for .net core 6 web services. Some years ago, at a previous job, I looked up how to do this with .net 3 and got it to work. But 6 removed the startup.cs file and seems to have shifted things around quite a bit. There are very few examples of doing this for 6.
I am in the process of creating a series of unit tests for the endpoints in a new web application. I am starting over from bare bones. Here is the code example. I know that it is possible to recreate the Startup.cs file, but for the time being I would prefer to do it without that. Are there any examples of this for a .net 6 specific architecture?
internal class DssiApiTest : WebApplicationFactory<Program>
{
private readonly string _environment;
public DssiApiTest(string environment = "Development")
{
_environment = environment;
}
protected override IHost CreateHost(IHostBuilder builder)
{
builder.UseEnvironment(_environment);
var settings = new ApiSettings();
// Add mock/test services to the builder here
builder.ConfigureServices(services =>
{
services.AddScoped(sp =>
{
var options = new DbContextOptionsBuilder<ApplicationDbContext>()
.UseInMemoryDatabase("Tests")
.UseApplicationServiceProvider(sp)
.Options;
using (var context = new ApplicationDbContext(options,
MakeMockTenantService(),
(Microsoft.Extensions.Options.IOptions<ApiSettings>)settings))
{
context.PartCustomers.Add(CreatePartCustomer(1, 1));
context.PartCustomers.Add(CreatePartCustomer(2, 1));
context.SaveChanges();
}
// Replace SQLite with in-memory database for tests
return options;
});
});
return base.CreateHost(builder);
}
}

Answer 1

I think I found the answer to what I needed to do. I have not been able to fully test it yet, however, because I am running into another issue that is throwing an error. Will have to ask another question for that one. Here is what I have so far. If anyone can elaborate or correct this please feel free to do so. Like I said, I have not fully tested it and don't want to lead others astray. Will update once I have it worked out.
I added a new TestAuthHandler to the virtual client that returns a mock auth result like so :
using var application = new TestWebApplicationFactory();
var client = application.WithWebHostBuilder(builder =>
{
builder.ConfigureTestServices(services =>
{
services.AddAuthentication("Test")
.AddScheme<AuthenticationSchemeOptions, TestAuthHandler>(
"Test", options => { });
});
})
.CreateClient(new WebApplicationFactoryClientOptions
{
AllowAutoRedirect = false,
});
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Test");
Here is the code for the TestAuthHandler
public class TestAuthHandler : AuthenticationHandler<AuthenticationSchemeOptions>
{
public TestAuthHandler(IOptionsMonitor<AuthenticationSchemeOptions> options,
ILoggerFactory logger, UrlEncoder encoder, ISystemClock clock)
: base(options, logger, encoder, clock)
{
}
protected override Task<AuthenticateResult> HandleAuthenticateAsync()
{
var claims = new[] { new Claim(ClaimTypes.Name, "Test user") };
var identity = new ClaimsIdentity(claims, "Test");
var principal = new ClaimsPrincipal(identity);
var ticket = new AuthenticationTicket(principal, "Test");
var result = AuthenticateResult.Success(ticket);
return Task.FromResult(result);
}
}