QA: Beautiful Chat — LangGraph (Python)

Prerequisites

• Demo is deployed and accessible at /demos/beautiful-chat on the dashboard host
• Agent backend is healthy (/api/health); OPENAI_API_KEY is set on Railway; LANGGRAPH_DEPLOYMENT_URL points at a LangGraph deployment exposing the beautiful_chat graph
• Note: the demo source contains no data-testid attributes. Checks below rely on verbatim visible text and DOM structure.

Test Steps

1. Basic Functionality

• Navigate to /demos/beautiful-chat; verify the page renders within 3s with the CopilotKit logo (img[alt="CopilotKit"], src /copilotkit-logo.svg) top-left of the chat pane
• Verify the Chat / App mode pill is fixed top-right, Chat active (highlighted) by default, and the right-side canvas region is collapsed (width 0)
• Verify the CopilotChat input is rendered with no disclaimer text below it
• Verify all 9 suggestion pills are visible with verbatim titles:
  • "Pie Chart (Controlled Generative UI)"
  • "Bar Chart (Controlled Generative UI)"
  • "Schedule Meeting (Human In The Loop)"
  • "Search Flights (A2UI Fixed Schema)"
  • "Sales Dashboard (A2UI Dynamic)"
  • "Excalidraw Diagram (MCP App)"
  • "Calculator App (Open Generative UI)"
  • "Toggle Theme (Frontend Tools)"
  • "Task Manager (Shared State)"
• Send "Hello" and verify an assistant text response appears within 10s

2. Feature-Specific Checks

Mode Toggle (frontend tools enableAppMode / enableChatMode)

• Click App; verify the canvas expands to ~2/3 width showing the TodoList empty state: pencil emoji, heading "No todos yet", subtext "Create your first task to get started", enabled "Add a task" button
• Click Chat; verify the canvas collapses back to width 0

Shared State — Task Manager (agent tools manage_todos, get_todos)

• Click the "Task Manager (Shared State)" pill; verify the mode auto-switches to App and within 15s the "To Do" column renders exactly 3 todo cards (each with emoji, title, description)
• Verify the "Done" column is empty (shows "No completed todos yet")
• Click a todo's checkbox; verify the card moves from "To Do" to "Done"

Controlled Generative UI — Pie Chart (agent tool query_data + frontend component pieChart)

• Click "Pie Chart (Controlled Generative UI)"; within 15s verify a pie-chart card renders in-transcript with a non-empty CardTitle and CardDescription
• Verify the donut SVG renders at least 2 <circle> slice elements inside the card
• Verify the legend renders one row per slice: colored dot, label, comma-formatted value, and a percentage ending in "%"; percentages sum to 100%

Controlled Generative UI — Bar Chart (agent tool query_data + frontend component barChart)

• Click "Bar Chart (Controlled Generative UI)"; within 15s verify a bar-chart card renders with CardTitle, CardDescription, and a bar-chart icon in the header
• Verify the recharts ResponsiveContainer (height 280px) renders at least 2 bar rectangles with X-axis labels matching the label field values; bars animate in via the barSlideIn keyframe on first render

Human-in-the-Loop — Schedule Meeting (frontend tool scheduleTime)

• Click "Schedule Meeting (Human In The Loop)"; within 15s verify a MeetingTimePicker card renders with a clock icon, a heading (agent-supplied reason or default "Schedule a Meeting"), 3 time-slot buttons each with date + time + a "30 min" duration badge, and a "None of these work" ghost button
• Click a time slot; verify the card switches to the confirmed state with heading "Meeting Scheduled", the chosen date/time, and a green check icon
• Re-trigger, click "None of these work"; verify the card shows heading "No Time Selected" and subtext "Looking for a better time that works for you"

A2UI Fixed Schema — Search Flights (agent tool search_flights)

• Click "Search Flights (A2UI Fixed Schema)"; within 20s verify exactly 2 flight cards render in-transcript, each with airline name, airline logo image, flight number, origin/destination, date, departure/arrival times, duration, a colored status dot, a status label (e.g. "On Time"), and a price starting with "$"

A2UI Dynamic — Sales Dashboard (agent tool generate_a2ui)

• Click "Sales Dashboard (A2UI Dynamic)"; within 30s verify a dynamic dashboard surface renders containing total-revenue metric, new-customers metric, conversion-rate metric, a pie chart (revenue by category), and a bar chart (monthly sales)

MCP App — Excalidraw Diagram

• Click "Excalidraw Diagram (MCP App)"; within 30s verify an Excalidraw embed renders a diagram with a router, 2 switches, and 4 computers (no console errors referencing the MCP server URL)

Open Generative UI — Calculator App

• Click "Calculator App (Open Generative UI)"; within 30s verify a sandboxed calculator UI renders with digit/operator buttons plus labeled metric shortcut buttons
• Click a metric shortcut button; verify its value is inserted into the calculator display

Frontend Tool — Toggle Theme (toggleTheme)

• Click "Toggle Theme (Frontend Tools)"; verify the html element's class attribute toggles between containing dark and not containing dark, and the CopilotKit logo inverts via the dark:invert class

3. Error Handling

• Attempt to send an empty message; verify it is a no-op (no user bubble, no assistant response)
• Send a ~500-character message; verify it wraps in-transcript without horizontal scroll or layout break
• With the backend stopped, send a message; verify the UI surfaces a visible error path rather than hanging silently, and DevTools → Console shows no uncaught errors during any flow above

Expected Results

• Chat loads within 3 seconds; plain-text response within 10 seconds
• Controlled charts (pie/bar) render within 15 seconds of prompt; A2UI surfaces within 20–30 seconds
• No UI layout breaks, no flash of unstyled content, no uncaught console errors
• All 5 agent tools (manage_todos, get_todos, query_data, search_flights, generate_a2ui) are exercised by at least one check above