---
phase: 01.1-hexagonal-architecture
plan: 05
subsystem: server
tags: [vitest, events, eventbus, server, shutdown, lifecycle, testing]

# Dependency graph
requires:
  - phase: 01.1-01
    provides: EventBus port interface and domain events (ServerStartedEvent, ServerStoppedEvent)
provides:
  - Comprehensive CoordinationServer test coverage
  - Server lifecycle event emission
  - GracefulShutdown test coverage
affects: [01.1-06]

# Tech tracking
tech-stack:
  added: []
  patterns: [event-driven-lifecycle, optional-dependency-injection]

key-files:
  created:
    - src/server/index.test.ts
    - src/server/shutdown.test.ts
  modified:
    - src/server/index.ts

key-decisions:
  - "EventBus is optional parameter for backwards compatibility"
  - "Events emitted before console.log in start(), before close in stop()"
  - "Signal handler tests verify listener count increase rather than triggering signals"

patterns-established:
  - "Optional eventBus injection pattern for lifecycle events"
  - "Mock creation helper functions for consistent test setup"

# Metrics
duration: 2min
completed: 2026-01-30
---

# Phase 1.1 Plan 05: Server Tests and Events Summary

**Comprehensive server test coverage with lifecycle event emission through EventBus for reactive coordination patterns**

## Performance

- **Duration:** 2 min
- **Started:** 2026-01-30T13:01:10Z
- **Completed:** 2026-01-30T13:03:38Z
- **Tasks:** 2
- **Files modified:** 3

## Accomplishments

- Comprehensive unit tests for CoordinationServer (lifecycle, HTTP endpoints, PID file management)
- Server emits ServerStarted and ServerStopped events through optional EventBus
- GracefulShutdown test coverage for shutdown() method and signal handler installation
- 16 new server tests + 6 shutdown tests = 22 new tests total

## Task Commits

Each task was committed atomically:

1. **Task 1: Write unit tests for CoordinationServer** - `ea79b3b` (test)
2. **Task 2: Add event emission to server and shutdown handler** - `1f255ee` (feat)

## Files Created/Modified

- `src/server/index.test.ts` - CoordinationServer lifecycle, HTTP endpoint, PID file, and event emission tests
- `src/server/shutdown.test.ts` - GracefulShutdown shutdown() and install() tests
- `src/server/index.ts` - Added optional eventBus parameter, emit ServerStarted/ServerStopped events

## Decisions Made

1. **EventBus as optional parameter** - Maintains backwards compatibility while enabling event-driven patterns
2. **Events emitted at specific lifecycle points** - ServerStarted after PID file written, ServerStopped before closing connections
3. **Signal handler tests use listener count** - Safer than triggering actual signals which could affect test runner

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Server module fully tested with event emission
- Event-driven lifecycle enables reactive patterns (dashboard updates, coordination)
- Ready for 01.1-06: Final integration and phase completion

---
*Phase: 01.1-hexagonal-architecture*
*Completed: 2026-01-30*
