Radicade/ServerTests/DbFactoryCollection.cs

using RadicadeServer.Utils;
using Xunit;

namespace RadicadeServer.Tests;

/// <summary>
/// RoomUtils/MatchmakingUtils expose their DbContext factories as process-wide statics, so
/// two test classes that replace them cannot run at the same time - whichever wins would
/// answer the other's queries. xUnit parallelizes classes by default, which made the suite
/// fail depending on scheduling; membership in this collection serializes those classes.
/// </summary>
[CollectionDefinition(Name)]
public class DbFactoryCollection : ICollectionFixture<RegistrationThrottleFixture>
{
    public const string Name = "SharesDbFactoryStatics";
}

/// <summary>
/// The registration throttle is process-wide state. This suite creates dozens of accounts from
/// loopback using the same handful of device ids, so without this the run would spend itself
/// refusing its own fixtures and prove nothing about registration. The limits themselves are
/// covered on their own terms by AccountRegistrationTests, which sets its own and puts them back.
/// </summary>
public sealed class RegistrationThrottleFixture
{
    public RegistrationThrottleFixture() =>
        RegistrationGuard.Configure(
            maxCreationsPerIp: int.MaxValue,
            maxCreationsPerDevice: int.MaxValue,
            minimumDeviceInterval: TimeSpan.Zero);
}