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2026-07-13 12:58:18 +08:00

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TypeScript

import { describe, it, expect } from "vitest";
import { runBubbleRaceRepro } from "./bubble-race-repro.js";
/**
* Defect 3 — diagnostic selector blindness under cascade fallback (closed).
*
* Historical context: `captureDiagnostics` in `d6-all-pills.ts` originally
* queried ONLY the canonical `[data-testid="copilot-assistant-message"]`
* selector to compute `assistantMsgCount`, while the conversation runner
* cascaded through four tiers (canonical → tagged article → non-user
* article → headless `[data-message-role="assistant"]`). Demos whose
* bubbles only satisfied a non-canonical tier produced "RED with no
* errors" diagnostics — the runner settled correctly via the fallback
* tier, but the diagnostic read was blind to the bubble. The runner's
* own `[conversation-runner] turn N/total — settled text { turnNum, text }`
* log line previously read via the same canonical-only selector, so a
* settled-via-fallback turn would log empty text.
*
* Phase 2 (s6) consolidated the cascade behind `countAssistantMessages` /
* `findAssistantBubbleAt` and routed both `captureDiagnostics` and the
* conversation runner's settled-text read through it. The runner now
* sources `settled text` from `waitForTurnComplete`'s
* `findAssistantBubbleAt(pwPage, bubbleIndex)` return value — the same
* cascade the count uses — so a tier-4-only demo like
* `langgraph-python:headless-simple` settles AND surfaces non-empty
* assistant text in the diagnostic log.
*
* Natural fallback target: `langgraph-python:headless-simple`. Its
* `AssistantBubble` component (showcase/integrations/langgraph-python
* /src/app/demos/headless-simple/message-bubble.tsx) emits
* <div data-testid="headless-message-assistant"
* data-message-role="assistant" …>
* <p>…</p>
* </div>
* — NO `data-testid="copilot-assistant-message"`, NO `role="article"`.
* Cascade tiers 1, 2, 3 all yield 0; tier 4 (`[data-message-role=
* "assistant"]` → `<p>` child read) matches. This test pins the
* post-cascade GREEN state: the runner finds the bubble AND the
* settled-text log is non-empty.
*/
describe("bubble-race repro (defect 3: diagnostic selector blindness — closed by shared cascade)", () => {
it("headless-simple settles a turn AND the runner's settled-text diagnostic reads via the cascade (non-empty)", async () => {
const result = await runBubbleRaceRepro({
slug: "langgraph-python:headless-simple",
level: "d5",
messages: ["Say hello in one short sentence"],
});
expect(result.exitCode).toBe(0);
expect(result.turns).toHaveLength(1);
// With the shared cascade in place, the settled-text diagnostic
// surfaces the tier-4 bubble's text. If this ever flips back to
// empty, defect-3 has regressed — the runner's `settled text` log
// is reading via a canonical-only selector again instead of the
// shared `findAssistantBubbleAt` cascade.
expect(result.turns[0].assistantText.trim().length).toBeGreaterThan(0);
}, 180_000);
});