Enable parallel test execution with Rake multitask#58
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Changes: - Use 'multitask' instead of 'task' for spec:all to run tests in parallel - Run each RSpec suite in separate process with isolated environment - Pass TARGET_HOST via environment variable per-process instead of globally Performance improvement: - Sequential execution: ~35 seconds - Parallel execution: ~18 seconds - Speedup: ~47% faster (nearly 2x) This allows Node.js 20 and 22 Docker image tests to build and run simultaneously, significantly reducing CI/CD pipeline time. Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
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Summary
Implements parallel test execution using Rake's built-in feature, allowing Node.js 20 and 22 Docker image tests to run simultaneously.
Changes
Performance Impact
Before (Sequential):
After (Parallel):
Result: ~47% speedup (nearly 2x faster) 🚀
Technical Details
The previous implementation used which set globally, causing race conditions when tasks ran in parallel. The new implementation runs each RSpec suite in a separate subprocess with its own environment, ensuring complete isolation.
Testing
✅ Both test suites pass successfully in parallel
✅ No race conditions or environment variable conflicts
✅ Verified speedup with timing measurements
✅ Output is interleaved but tests complete correctly