---
id: ML-182.6
title: "Wave 6: Chat component streaming tests (send_update/3 blocker)"
status: To Do
assignee: []
created_date: "2026-05-14 22:15"
labels:
  - testing
  - refactoring
dependencies: []
modified_files:
  - test/music_library_web/components/chat_test.exs
parent_task_id: ML-182
priority: medium
ordinal: 16000
---

## Description

<!-- SECTION:DESCRIPTION:BEGIN -->

The hardest file — `components/chat_test.exs` uses `Phoenix.LiveView.send_update(view.pid, Chat, [chunk: ..., done: ..., error: ...])` to drive the Chat component's internal `update/2` callback directly with streaming state tuples. This is unit-level LiveComponent testing with no PhoenixTest equivalent — PhoenixTest has no concept of LiveComponent PIDs.

3 tests affected in "update/2 streaming state transitions" describe block:

- "chunk clause appends to the streaming doc"
- "done clause finalizes the assistant message and clears loading"
- "error clause surfaces the error and a retry button"

Workaround: Rewrite as integration tests through the actual SSE streaming pipeline (stub OpenAI.API to emit controlled SSE events, use `visit/2` + `assert_has/3`).

Effort: High (4-6h). Requires understanding the SSE streaming protocol and Chat component internals.

<!-- SECTION:DESCRIPTION:END -->
