Skill

llt-online-tests

Specialized guidance for working with Epic's Online Tests framework (OSSv2 testing)

Install

npx claudepluginhub issacchaos/local-marketplace --plugin test-engineering

Tool Access

This skill uses the workspace's default tool permissions.

Preview

**Purpose:** Specialized guidance for working with Epic's Online Tests framework (OSSv2 testing).

Supporting Assets

skill.yaml

SKILL.md

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Last CommitApr 12, 2026

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LLT: Online Tests Framework

Purpose: Specialized guidance for working with Epic's Online Tests framework (OSSv2 testing).

Framework Overview

Online Tests is a production LowLevelTest variant built on Catch2 for testing OnlineSubsystem interfaces (OSSv2). It uses a builder pattern for async operation orchestration.

Key Components

OnlineTestsCore (Public): Core builder pattern infrastructure, step definitions
OnlineTests (Internal): Epic-internal test implementations
Builder Pattern: Chain async steps with .EmplaceStep<T>() and execute with .RunToCompletion()

Test Macros

ONLINE_TEST_CASE("Login to EOS", "[Login][EOS]")
{
    GetLoginPipeline(FOnlineAccountIdRegistryRegistry::Get(EOnlineServices::Epic))
        .EmplaceStep<FOnlineAutoLogin>()
        .EmplaceStep<FOnlineAutoLogout>()
        .RunToCompletion();
}

RESONANCE_TEST_CASE("Join Audio Channel", "[Resonance][Audio]")
{
    GetLoginPipeline()
        .EmplaceStep<FSetupResonanceChannel>()
        .EmplaceStep<FJoinResonanceChannel>()
        .EmplaceStep<FVerifyAudioPackets>()
        .RunToCompletion();
}

Common Pipelines

Pipeline	Purpose	Common Steps
Login Pipeline	User authentication	FOnlineAutoLogin, FOnlineAutoLogout
Session Pipeline	Matchmaking/sessions	FCreateSession, FJoinSession, FLeaveSession
Resonance Pipeline	Voice chat	FSetupResonanceChannel, FJoinResonanceChannel

Step Pattern

Steps inherit from FOnlineStep and implement async operations:

class FOnlineAutoLogin : public FOnlineStep
{
    virtual void Run(FOnlineStepContext& Context) override
    {
        // Async login operation
        Context.OnlineServices->GetAuthInterface()->Login(...)
            .OnComplete([this, &Context](const TOnlineResult<FAuthLogin>& Result)
            {
                Context.CompleteStep(Result.IsOk());
            });
    }
};

Integration with llt-find

Online Tests are discovered like standard LLTs:

Module: OnlineTests (internal), OnlineServicesMcpTests (per-service)
Test macros: ONLINE_TEST_CASE, RESONANCE_TEST_CASE
BuildGraph: Registered in FortniteGame/Build/LowLevelTests.xml

References

Documentation: Online Tests Internal Documentation.pdf
Source: FortniteGame/Plugins/ForEngine/Online/OnlineTestsCore/
Examples: FortniteGame/Plugins/ForEngine/Online/OnlineServicesMcp/Tests/