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QA: Open-Ended Generative UI (Advanced) — LangGraph (Python)

Prerequisites

  • Demo is deployed and accessible
  • Agent backend is healthy (check /api/health)
  • Graph open_gen_ui_advanced is registered in the OGUI runtime (api/copilotkit-ogui/route.ts) with openGenerativeUI.agents including "open-gen-ui-advanced"
  • Sandbox-function handlers in sandbox-functions.ts are exported: evaluateExpression and notifyHost

Test Steps

1. Basic Functionality

  • Navigate to the open-gen-ui-advanced demo page
  • Verify the <CopilotChat> renders full-height within the centered max-w-4xl container
  • Verify the input composer is visible
  • Send a basic message (e.g. "Hi")
  • Verify the agent calls generateSandboxedUi and a sandboxed iframe mounts in the assistant turn

2. Feature-Specific Checks

Suggestions

  • Verify "Calculator (calls evaluateExpression)" suggestion is visible
  • Verify "Ping the host (calls notifyHost)" suggestion is visible
  • Verify "Inline expression evaluator" suggestion is visible

Sandbox-to-Host: evaluateExpression (Calculator)

  • Click the "Calculator (calls evaluateExpression)" suggestion
  • Verify a sandboxed iframe renders a calculator UI with digit buttons, operator buttons, a display, and an "=" button
  • Verify all buttons use type="button" — no <form> element is present inside the iframe
  • Enter an expression like 12 * (3 + 4.5) via the calculator buttons (or the generated input)
  • Open browser devtools console BEFORE pressing "="
  • Press "="
  • Verify the host console logs [open-gen-ui/advanced] evaluateExpression 12 * (3 + 4.5) = 90
  • Verify the display updates to show 90 (the res.value returned by the host)
  • Verify a computed-history entry appears below the display
  • In a follow-up user turn, type "What was the result of my last calculation?" and verify the agent's text response references the computed value (round-trip: sandbox call -> host handler -> visible result -> agent awareness via subsequent turn context)

Sandbox-to-Host: notifyHost (Ping)

  • In a new turn, click the "Ping the host (calls notifyHost)" suggestion
  • Verify a sandboxed iframe renders a card with a single "Say hi to the host" button
  • Open the browser devtools console
  • Click the button
  • Verify the host console logs [open-gen-ui/advanced] notifyHost: Hi from the sandbox!
  • Verify the card updates to display the returned confirmation object, including a receivedAt ISO-8601 timestamp and the echoed message field

Sandbox-to-Host: Inline Expression Evaluator

  • In a new turn, click the "Inline expression evaluator" suggestion
  • Verify a sandboxed iframe renders a text input + "Evaluate" button (no <form>, button type="button")
  • Enter 2 + 2 and click "Evaluate"
  • Verify the output area renders 4 (from res.value)
  • Enter an invalid expression abc + 1 and click "Evaluate"
  • Verify the output area renders the error string from res.error (e.g. "Unsupported characters in expression.")

Sandbox Constraints

  • Verify the iframe sandbox attribute is sandbox="allow-scripts" only (no allow-forms, no allow-same-origin)
  • Verify no network requests originate from the iframe (check DevTools Network filtered by iframe frame)
  • Verify the agent keeps its own chat message brief (1 sentence) — the rendered UI is the real output

3. Error Handling

  • Enter an expression with unsupported characters (e.g. alert(1)) into the calculator/evaluator and confirm res.ok === false with error "Unsupported characters in expression."
  • Enter a divide-by-zero (1/0) — verify the handler returns { ok: false, error: "Not a finite number." } and the UI renders the error path
  • Refresh the page mid-stream — verify no broken UI persists
  • Send an empty message — input should be rejected without error
  • Verify no console errors beyond the two intentional console.log statements from the sandbox-function handlers

Expected Results

  • Chat loads within 3 seconds
  • First interactive sandboxed UI mounts within ~15 seconds of prompt submission
  • Sandbox -> host round-trip (button click -> Websandbox.connection.remote.<fn> -> visible result) completes without page reload
  • evaluateExpression returns { ok, value } on valid input and { ok: false, error } on rejected input
  • notifyHost returns { ok: true, receivedAt, message } with a valid ISO-8601 timestamp
  • No UI errors or broken layouts