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import { test, expect } from "@playwright/test";
// QA reference: qa/tool-rendering-reasoning-chain.md
// Demo source: src/app/demos/tool-rendering-reasoning-chain/page.tsx
//
// The reasoning-chain cell composes two patterns into one chat surface:
// - Reasoning-summary streaming (OpenAI Responses API, `reasoning={
// "effort":"medium","summary":"detailed"}`) rendered through a
// `messageView.reasoningMessage` slot (<ReasoningBlock>).
// - Per-tool renderers wired via `useRenderTool` for `get_weather` and
// `search_flights`, plus a `useDefaultRenderTool` catchall that
// paints `get_stock_price` and `roll_dice`.
//
// Every pill drives a CHAINED two-tool flow:
// - Stocks: get_stock_price(AAPL) → get_stock_price(MSFT) → comparison.
// - Dice: roll_dice(sides=20) → roll_dice(sides=6) → contrast.
// - Flights+weather: search_flights(SFO,JFK) → get_weather(JFK) → plan.
//
// Aimock fixtures live in showcase/aimock/d5-all.json (and the matching
// harness source at showcase/harness/fixtures/d5/tool-rendering-
// reasoning-chain.json) and pin every pill to a deterministic two-leg
// chain. The sequential-pills test is the regression guard for the
// AG-UI reasoning-role message bug in @copilotkit/runtime — without
// `LangGraphAgent.run`'s reasoning-role filter, clicking a second pill
// in the same thread used to crash with INCOMPLETE_STREAM because
// @ag-ui/langgraph's message converter throws on `role:"reasoning"`.
const SUGGESTION_TIMEOUT = 15_000;
const TOOL_TIMEOUT = 60_000;
const REASONING_TIMEOUT = 30_000;
const PILLS = [
"Compare two stocks",
"Chain of dice rolls",
"Flights + destination weather",
] as const;
test.describe("Tool Rendering — Reasoning Chain", () => {
test.beforeEach(async ({ page }) => {
await page.goto("/demos/tool-rendering-reasoning-chain");
await expect(page.getByPlaceholder("Type a message")).toBeVisible({
timeout: SUGGESTION_TIMEOUT,
});
});
test("page loads with composer and 3 suggestion pills", async ({ page }) => {
const suggestions = page.locator('[data-testid="copilot-suggestion"]');
for (const title of PILLS) {
await expect(suggestions.filter({ hasText: title }).first()).toBeVisible({
timeout: SUGGESTION_TIMEOUT,
});
}
// Sanity: no per-tool cards mounted before any pill click.
await expect(page.locator('[data-testid="weather-card"]')).toHaveCount(0);
await expect(page.locator('[data-testid="flight-list-card"]')).toHaveCount(
0,
);
await expect(
page.locator('[data-testid="custom-catchall-card"]'),
).toHaveCount(0);
await expect(page.locator('[data-testid="reasoning-block"]')).toHaveCount(
0,
);
});
test("Compare two stocks pill chains AAPL → MSFT through the catchall renderer", async ({
page,
}) => {
await page
.locator('[data-testid="copilot-suggestion"]')
.filter({ hasText: "Compare two stocks" })
.first()
.click();
// Both legs of the chain mount via the catchall renderer — scoped
// by `data-tool-name` so we'd notice if a future per-tool stock
// renderer landed and only one card rendered.
const stockCards = page.locator(
'[data-testid="custom-catchall-card"][data-tool-name="get_stock_price"]',
);
await expect
.poll(async () => stockCards.count(), { timeout: TOOL_TIMEOUT })
.toBe(2);
// Reasoning slot mounts at least once — proves the agent's
// reasoning summaries reached the messageView slot, which is the
// whole reason this cell exists vs the plain tool-rendering demo.
await expect(
page.locator('[data-testid="reasoning-block"]').first(),
).toBeVisible({ timeout: REASONING_TIMEOUT });
// Narration text comes from the fixture final-content leg.
await expect(page.getByText("AAPL is at")).toBeVisible({
timeout: TOOL_TIMEOUT,
});
await expect(page.getByText("MSFT is at")).toBeVisible({
timeout: TOOL_TIMEOUT,
});
});
test("Chain of dice rolls pill chains d20 → d6 through the catchall renderer", async ({
page,
}) => {
await page
.locator('[data-testid="copilot-suggestion"]')
.filter({ hasText: "Chain of dice rolls" })
.first()
.click();
const diceCards = page.locator(
'[data-testid="custom-catchall-card"][data-tool-name="roll_dice"]',
);
await expect
.poll(async () => diceCards.count(), { timeout: TOOL_TIMEOUT })
.toBe(2);
await expect(
page.locator('[data-testid="reasoning-block"]').first(),
).toBeVisible({ timeout: REASONING_TIMEOUT });
// Final narration mentions both dice + the contrast framing.
await expect(page.getByText(/d20 came up/i)).toBeVisible({
timeout: TOOL_TIMEOUT,
});
});
test("Flights + destination weather pill chains search_flights → get_weather through branded per-tool renderers", async ({
page,
}) => {
await page
.locator('[data-testid="copilot-suggestion"]')
.filter({ hasText: "Flights + destination weather" })
.first()
.click();
// Flights card uses its branded renderer (not the catchall).
const flights = page.locator('[data-testid="flight-list-card"]').first();
await expect(flights).toBeVisible({ timeout: TOOL_TIMEOUT });
await expect(
flights.locator('[data-testid="flight-origin"]'),
).toContainText("SFO", { timeout: TOOL_TIMEOUT });
await expect(
flights.locator('[data-testid="flight-destination"]'),
).toContainText("JFK", { timeout: TOOL_TIMEOUT });
// Destination weather card uses its branded renderer.
const weather = page.locator('[data-testid="weather-card"]').first();
await expect(weather).toBeVisible({ timeout: TOOL_TIMEOUT });
await expect(weather.locator('[data-testid="weather-city"]')).toContainText(
"JFK",
{ timeout: TOOL_TIMEOUT },
);
await expect(
page.locator('[data-testid="reasoning-block"]').first(),
).toBeVisible({ timeout: REASONING_TIMEOUT });
// Catchall renderer must NOT mount for these tools — both have
// per-tool registrations.
await expect(
page.locator('[data-testid="custom-catchall-card"]'),
).toHaveCount(0);
});
// REGRESSION for the AG-UI reasoning-role message bug:
// `@ag-ui/langgraph`'s message converter throws "message role is
// not supported." on any role outside {user,assistant,system,tool}.
// Reasoning-stream agents emit `role:"reasoning"` messages that the
// AG-UI client replays on subsequent turns. Without the
// reasoning-role filter in @copilotkit/runtime's LangGraphAgent.run
// subclass, the SECOND pill click crashes before the model is
// called and the user sees a runtime error toast.
//
// This test clicks all three pills sequentially in ONE thread and
// asserts the full chain renders for each — proving cross-turn safety.
// It also catches a regression in any of:
// - The fixture toolCallId chains (degrading multi-pill to single
// tool calls).
// - The reasoning summary emission on follow-up turns.
// - Per-tool renderer state isolation between turns.
test("sequential pills in one thread render full chains + reasoning blocks for each", async ({
page,
}) => {
// Three sequential pills × 2-tool chains × LLM-mock latency easily
// exceeds Playwright's 30s default. Match the budget the
// tool-rendering-default-catchall multi-pill regression uses.
test.setTimeout(240_000);
const reasoningBlocks = page.locator('[data-testid="reasoning-block"]');
// Pill 1 — stocks chain.
await page
.locator('[data-testid="copilot-suggestion"]')
.filter({ hasText: "Compare two stocks" })
.first()
.click();
const stockCards = page.locator(
'[data-testid="custom-catchall-card"][data-tool-name="get_stock_price"]',
);
await expect
.poll(async () => stockCards.count(), { timeout: TOOL_TIMEOUT })
.toBe(2);
await expect
.poll(async () => reasoningBlocks.count(), { timeout: REASONING_TIMEOUT })
.toBeGreaterThanOrEqual(1);
// Pill 2 — dice chain. The KEY assertion: this used to crash with
// INCOMPLETE_STREAM before the reasoning-role filter landed.
await page
.locator('[data-testid="copilot-suggestion"]')
.filter({ hasText: "Chain of dice rolls" })
.first()
.click();
const diceCards = page.locator(
'[data-testid="custom-catchall-card"][data-tool-name="roll_dice"]',
);
await expect
.poll(async () => diceCards.count(), { timeout: TOOL_TIMEOUT })
.toBe(2);
// Reasoning blocks should have INCREASED — proves the second turn
// produced fresh reasoning, not just reusing turn 1's block.
await expect
.poll(async () => reasoningBlocks.count(), { timeout: REASONING_TIMEOUT })
.toBeGreaterThanOrEqual(2);
// Pill 3 — flights + destination weather. Final regression hop.
await page
.locator('[data-testid="copilot-suggestion"]')
.filter({ hasText: "Flights + destination weather" })
.first()
.click();
await expect(
page.locator('[data-testid="flight-list-card"]').first(),
).toBeVisible({ timeout: TOOL_TIMEOUT });
await expect(
page.locator('[data-testid="weather-card"]').first(),
).toBeVisible({ timeout: TOOL_TIMEOUT });
await expect
.poll(async () => reasoningBlocks.count(), { timeout: REASONING_TIMEOUT })
.toBeGreaterThanOrEqual(3);
// Final sanity: card counts for the prior turns survived (no
// unmounts mid-thread).
await expect(stockCards).toHaveCount(2);
await expect(diceCards).toHaveCount(2);
});
});