Dependency Injection in XUnit CAN be done, including logging to unit test output. Simply add a Startup.cs that looks like this:
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Xunit.DependencyInjection.Logging;
namespace Vendor.Api.Test;
public class Startup
{
public static void ConfigureServices(IServiceCollection services)
{
// Load config
var config = new ConfigurationBuilder()
.AddJsonFile("../../../appsettings.json", true)
.AddEnvironmentVariables()
.AddUserSecrets<Startup>()
.Build();
services
.AddLogging(lb => lb
.AddDebug()
.AddFilter(level => level >= LogLevel.Debug)
.AddXunitOutput()
)
.AddTransient(s =>
{
var options = config.GetSection("VendorClientOptions").Get<VendorClientOptions>()
?? throw new FormatException("Configuration is missing a valid VendorClientOptionssection");
options.Validate();
return new VendorClient(options, s.GetRequiredService<ILogger<VendorClient>>());
})
;
}
}
After that, your Unit Test file can look like this:
using FluentAssertions;
namespace Vendor.Api.Test;
public class UserTests(VendorClient client)
{
[Fact]
public async Task Get_Page_Succeeds()
{
// Arrange
var result = await client.Users.GetAsync(default);
result.Should().NotBeNull();
}
}
To see it in action, check out this repo: https://github.com/panoramicdata/Datadog.Api/
