---
phase: 09-message-composition
plan: 02
subsystem: ui
tags: [react, redux, chat, integration-tests, playwright, websocket, send-message, receive-message]

# Dependency graph
requires:
  - phase: 09-message-composition
    provides: JKChatComposer component with validation and keyboard handling
  - phase: 08-chat-window-ui
    provides: JKSessionChatWindow shell with message list
  - phase: 07-chat-infrastructure
    provides: sendMessage thunk, WebSocket integration, Redux state management
provides:
  - Complete chat window with integrated composer
  - Send message functionality with validation
  - Real-time message receive via WebSocket
  - Integration tests for send and receive flows (11 tests total)
affects: [10-read-unread-status, 11-chat-finalization]

# Tech tracking
tech-stack:
  added: []
  patterns: [playwright-popup-testing, redux-store-access-in-tests, websocket-simulation-via-dispatch]

key-files:
  created:
    - jam-ui/test/chat/send-message.spec.ts
    - jam-ui/test/chat/receive-message.spec.ts
  modified:
    - jam-ui/src/components/client/JKSessionChatWindow.js

key-decisions:
  - "Flex layout for window: header fixed, message list scrollable (flex: 1), composer fixed at bottom"
  - "WebSocket testing via direct Redux dispatch (simpler than full WebSocket mocking)"
  - "Separate test files for send vs receive flows for better organization"

patterns-established:
  - "Popup window testing pattern: context.waitForEvent('page') then interact with popup"
  - "Redux state access in tests: window.__REDUX_STORE__ for state inspection and dispatch"
  - "Optimistic update verification: expect message visible within 1 second (no server wait)"

issues-created: []

# Metrics
duration: 2 min
completed: 2026-01-27
---

# Phase 9 Plan 2: Send Message Integration & Real-Time Delivery Summary

**Integrated composer into chat window with flex layout, completed send/receive functionality, and validated with 11 comprehensive integration tests**

## Performance

- **Duration:** 2 min
- **Started:** 2026-01-27T14:16:48Z
- **Completed:** 2026-01-27T14:18:20Z
- **Tasks:** 3
- **Files modified:** 3 (1 modified, 2 created)

## Accomplishments

- JKChatComposer integrated into JKSessionChatWindow
- Complete three-section window layout: Header → Message List (scrollable) → Composer
- Send message flow works end-to-end with validation
- Real-time message receive via WebSocket integration
- Message deduplication prevents duplicates
- Optimistic updates show messages immediately
- Integration tests: 11 total (7 send flow, 4 receive flow)

## Task Commits

Each task was committed atomically:

1. **Task 1: Integrate JKChatComposer into JKSessionChatWindow** - `b558bfe0c` (feat)
2. **Task 2: Write integration tests for send message flow** - `9eb58bd02` (test)
3. **Task 3: Write integration tests for receive message flow** - `984c60c65` (test)

**Plan metadata:** (pending - will commit with SUMMARY)

## Files Created/Modified

**Created:**
- `jam-ui/test/chat/send-message.spec.ts` - Integration tests for send message behavior (7 tests)
- `jam-ui/test/chat/receive-message.spec.ts` - Integration tests for receive message via WebSocket (4 tests)

**Modified:**
- `jam-ui/src/components/client/JKSessionChatWindow.js` - Added JKChatComposer with flex layout

## Decisions Made

**Window layout architecture:**
- Used flex container with column direction for vertical stacking
- Header: Fixed at top (auto-height based on content)
- Message List: Wrapped in scrollable div with `flex: 1` (fills available space)
- Composer: Fixed at bottom (auto-height based on content)
- This ensures proper space distribution and scrolling behavior

**WebSocket testing approach:**
- Simulate WebSocket messages via direct Redux dispatch instead of full WebSocket mocking
- Valid because Phase 7 already tested WebSocket handler separately
- These tests focus on UI response to Redux state changes
- Simpler and more maintainable than complex WebSocket mocking

**Test file organization:**
- Separate files for send vs receive flows for better organization
- Send tests focus on user input and validation
- Receive tests focus on WebSocket integration and state updates
- Easier to maintain and extend in the future

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None

## Next Phase Readiness

**Phase 9 Complete!**

Message Composition & Sending fully functional:
- Composer UI with validation (Plan 9.1)
- Send integration and real-time delivery (Plan 9.2)

Ready for Phase 10 (Read/Unread Status Management).

Next phase will add:
- Unread message tracking per channel
- Badge updates on new messages
- Mark-as-read on window open
- localStorage persistence for unread counts

---
*Phase: 09-message-composition*
*Completed: 2026-01-27*
