What are checkpoint signals in Breenix testing?

Checkpoint signals are specific unique strings (like '✅ TEST COMPLETE') printed to the serial output that the test runner monitors to verify the kernel has reached a specific state or completed a task.

Can I use this skill for userspace application testing?

Yes, the skill includes specific patterns for loading ELF binaries, executing them in userspace, and capturing their output via syscalls to verify correct behavior.

Does this skill help with CI/CD setup?

Absolutely. It includes templates for GitHub Actions that handle the installation of dependencies like QEMU, OVMF, and NASM, ensuring tests run reliably in the cloud.

How does the shared QEMU pattern improve testing efficiency?

Instead of booting a new QEMU instance for every test, the shared pattern runs multiple tests in sequence during a single boot, reducing total execution time from over 10 minutes to roughly 45 seconds.

Breenix Integration Test Authoring

Name: Breenix Integration Test Authoring
Author: ryanbreen

byryanbreen

•

Security & Testing

Streamlines the creation of kernel integration tests for Breenix using shared QEMU instances and serial checkpoint signals.

About

This skill provides specialized guidance and implementation patterns for developing robust integration tests within the Breenix kernel environment. It focuses on the 'shared QEMU' architecture, which significantly reduces test duration by running multiple tests within a single kernel boot cycle. Developers can easily generate kernel-side test hooks, Rust integration wrappers, and monitoring logic that listens for serial output signals. It is particularly useful for verifying kernel subsystems, userspace execution, and preventing regressions through automated GitHub Actions workflows.

Key Features

Shared QEMU instance patterns to reduce test runtime from minutes to seconds
Checkpoint signal implementation for monitoring serial output markers
Standardized templates for kernel-side and Rust-side test code
Custom xtask command generation for complex test orchestration
Automated CI/CD workflow templates for GitHub Actions kernel testing
4 GitHub stars

Use Cases

Developing and verifying new kernel-level features in a virtualized QEMU environment
Testing userspace program execution and system call interfaces
Creating automated regression tests to prevent previously fixed bugs from recurring

About

Key Features

Shared QEMU instance patterns to reduce test runtime from minutes to seconds
Checkpoint signal implementation for monitoring serial output markers
Standardized templates for kernel-side and Rust-side test code
Custom xtask command generation for complex test orchestration
Automated CI/CD workflow templates for GitHub Actions kernel testing
4 GitHub stars

Use Cases

Developing and verifying new kernel-level features in a virtualized QEMU environment
Testing userspace program execution and system call interfaces
Creating automated regression tests to prevent previously fixed bugs from recurring