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