---
id: TASK-12
title: Add unit tests for test_client module
status: Done
assignee:
  - '@codex'
created_date: '2026-03-11 17:17'
updated_date: '2026-03-11 17:20'
labels: []
dependencies: []
---

## Description

<!-- SECTION:DESCRIPTION:BEGIN -->
Add unit tests for the client test CLI (test_client) to validate input handling and event printing behavior.
<!-- SECTION:DESCRIPTION:END -->

## Acceptance Criteria
<!-- AC:BEGIN -->
- [x] #1 Tests cover handle_input_line for /quit, /exit, /ping, /disconnect, and normal message flow.
- [x] #2 Tests validate print_client_event output for Connecting, Connected, Disconnected, MessageReceived, SystemMessage, Error, and Pong.
- [x] #3 Tests are deterministic and avoid sleeps; use in-memory channels and captured stdout.
<!-- AC:END -->

## Implementation Plan

<!-- SECTION:PLAN:BEGIN -->
1. Inspect `crates/net/src/client/test_client.rs` for testable helpers (handle_input_line, print_client_event).
2. Add test-only helper to capture stdout for print_client_event without external deps.
3. Write unit tests for handle_input_line covering /quit, /exit, /ping, /disconnect, and message flow using a minimal ClientHandle harness.
4. Write unit tests for print_client_event covering all variants and asserting output strings.
5. Run just check and adjust for clippy and determinism.
<!-- SECTION:PLAN:END -->

## Implementation Notes

<!-- SECTION:NOTES:BEGIN -->
- Added format_client_event helper and tests for handle_input_line and event formatting in `crates/net/src/client/test_client.rs`.
- Tests use spawn_client with timeouts; no sleeps; stdout capture avoided by formatting helper.
- just check passes.
<!-- SECTION:NOTES:END -->

## Final Summary

<!-- SECTION:FINAL_SUMMARY:BEGIN -->
Added unit tests for `crates/net/src/client/test_client.rs`.

Changes:
- Introduced `format_client_event` helper to make event output testable and used by `print_client_event`.
- Added handle_input_line tests for /quit, /exit, /ping, /disconnect, and normal message flow.
- Added formatting tests for all client event variants using deterministic timeouts (no sleeps).

Checks:
- just check
<!-- SECTION:FINAL_SUMMARY:END -->
