Build end-to-end test framework

[dorser]

Summary

The tests/ directory exists but is completely empty. No integration or end-to-end tests exist.

What's Needed

Design and implement a test framework that can:

Test Types

1. Smoke tests: Deploy micromize, verify it starts and loads gadgets
2. Gadget behavior tests: Verify each gadget correctly blocks/audits:
   • fs-restrict: Execute a binary from a restricted path, verify it's blocked
   • cap-restrict: Attempt a restricted capability operation, verify it's blocked
   • ptrace-restrict: Attempt ptrace, verify it's blocked
3. Audit mode tests: Same operations in audit mode, verify events are logged but not blocked
4. Exclusion tests: Verify excluded containers are not affected

Infrastructure Options

• Kind cluster for Kubernetes-based testing
• Docker-based for standalone testing
• Use Go test framework with testing.T
• Consider BPF test tools or BPF_PROG_TEST_RUN

CI Integration

• These tests require privileged access and specific kernel versions
• Consider a separate CI workflow with self-hosted runners or VM-based runners

Files

• tests/ (currently empty)
• gadgets/*/program.bpf.c