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QA: Tool Rendering (Custom Catch-all) — LangGraph (Python)

Prerequisites

  • Demo is deployed and accessible
  • Agent backend is healthy (check /api/health)
  • Agent slug tool-rendering-custom-catchall is registered at /api/copilotkit

Test Steps

1. Basic Functionality

  • Navigate to the tool-rendering-custom-catchall demo page
  • Verify the chat interface loads in a centered full-height layout (max-width 4xl, rounded-2xl)
  • Verify the chat input placeholder "Type a message" is visible
  • Send a basic message (e.g. "Hi")
  • Verify the agent responds with a text message

2. Feature-Specific Checks — Branded Wildcard Renderer

The frontend calls useDefaultRenderTool({ render: ... }) with a SINGLE branded wildcard component (CustomCatchallRenderer). There are ZERO per-tool named renderers. Every tool call must paint via this one branded card regardless of tool identity.

Suggestions

  • Verify "Weather in SF" suggestion pill is visible
  • Verify "Find flights" suggestion pill is visible
  • Verify "Roll a d20" suggestion pill is visible
  • Click a suggestion and verify it either populates the input or sends the message

get_weather renders via the branded catch-all card

  • Click the "Weather in SF" suggestion (or type "What's the weather in San Francisco?")
  • Verify the branded card renders (data-testid="custom-catchall-card") with:
    • An uppercase label "Tool" followed by the tool name get_weather (data-testid="custom-catchall-tool-name", monospaced)
    • The card root carries data-tool-name="get_weather"
    • A status badge (data-testid="custom-catchall-status") that transitions through streaming (amber), running (lavender/indigo), and finally done (green #189370)
    • An "Arguments" section with a monospaced pre block (data-testid="custom-catchall-args") showing pretty-printed JSON of the parameters
    • A "Result" section showing "waiting for tool to finish…" while pending and a green-tinted pre block (data-testid="custom-catchall-result") once status === "complete"
    • The completed Result pre shows the mock weather payload (city, temperature: 68, humidity: 55, wind_speed: 10, conditions: "Sunny")
  • Verify the card uses the branded styling: white background, rounded 2xl corners, #DBDBE5 border, #FAFAFC header strip, subtle shadow

search_flights renders via the SAME branded catch-all card

  • Click the "Find flights" suggestion (or type "Find flights from SFO to JFK")
  • Verify a second data-testid="custom-catchall-card" renders
  • Verify data-tool-name="search_flights" on the card root and the name label reads search_flights
  • Verify the visual style is IDENTICAL to the get_weather card — same header strip, same status badge treatment, same Arguments/Result sections
  • Verify the Result pre shows the mock flights array (United UA231, Delta DL412, JetBlue B6722)

roll_dice renders via the SAME branded catch-all card

  • Click the "Roll a d20" suggestion (or type "Roll a 20-sided die")
  • Verify another custom-catchall-card renders with data-tool-name="roll_dice"
  • Verify the Result pre shows { "sides": 20, "result": <1-20> }

get_stock_price renders via the SAME branded catch-all card

  • Type "How is AAPL doing?"
  • Verify a custom-catchall-card with data-tool-name="get_stock_price" renders
  • Verify the Result pre shows ticker: "AAPL", a price_usd, and a change_pct

No built-in default UI appears

  • Verify NO instance of CopilotKit's built-in DefaultToolCallRenderer appears alongside the branded card — the branded card replaces it
  • Verify every rendered tool call is a data-testid="custom-catchall-card" element

Chained tool calls all paint the same branded card

  • Ask "What's the weather in Tokyo?" — the system prompt instructs the agent to chain tools
  • Verify at least TWO custom-catchall-card elements render in succession (e.g. one for get_weather, one for search_flights)
  • Verify each carries a distinct data-tool-name but the visual style is identical
  • While a tool is in flight, verify the status badge reads streaming or running and the Result section shows "waiting for tool to finish…"; after completion the badge reads done and the green Result pre appears

3. Error Handling

  • Send an empty message (should be handled gracefully)
  • Verify no console errors during normal usage
  • Verify the done badge text and the completed-result green tint (#85ECCE) remain stable across re-renders

Expected Results

  • Chat loads within 3 seconds
  • Every tool invocation paints via the single branded CustomCatchallRenderer card — zero visual variance beyond data-tool-name and the payload
  • Status badge progresses: streaming → running → done
  • Branded styling details from custom-catchall-renderer.tsx are visible (uppercase "Tool" label, monospaced tool-name, rounded-2xl card, header strip, tone-coded status badge, green result pre on completion)
  • No UI errors or broken layouts