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test(perf): add UX harness with a fake nip-07 extension (phase 1)
Lets the agent observe the real app the way a user does: runs bitvid in headless Chromium against an in-process mock relay, injects a fake window.nostr extension backed by Node-side nostr-tools crypto (via page.exposeFunction) with a serialized ~100ms latency queue to model a real extension. Drives the real nip-07 login flow, isolates to the mock relay via a seeded NIP-65 list, and captures console logs, per-method extension call counts, feed-render timing, and screenshots. Phase 1 (this commit) verifies fake-extension login + relay isolation + metrics. Already surfaced a stuck "Fetching recent videos…" state to investigate. Next phases: seed encrypted watch-history chunks and DMs to reproduce/verify the decrypt-cache wins and the DM-history bug, with before/after extension-call counts. Co-Authored-By: Claude Opus 4.8 <[email protected]>
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// Automated UX/perf harness with a FAKE nip-07 extension.
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//
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// Runs the real bitvid app in headless Chromium against an in-process mock relay,
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// injecting a fake `window.nostr` extension backed by Node-side nostr-tools
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// crypto (via page.exposeFunction). Each extension call is serialized through a
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// queue with simulated latency to model a real browser extension, so load times
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// and the decrypt-cache win are realistic and measurable.
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//
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// Captures: console logs, per-method extension call counts, timing milestones,
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// and screenshots. Phase 1 verifies the fake extension + nip-07 login + render.
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//
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// Usage: node scripts/perf/ux-harness.mjs
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// env: APP=http://localhost:3000 LATENCY_MS=100 VIDEOS=40 HEADLESS=1
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import { chromium } from "playwright";
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import { startRelay } from "../agent/simple-relay.mjs";
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import {
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finalizeEvent,
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getPublicKey,
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generateSecretKey,
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nip04,
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} from "nostr-tools";
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import * as nip44 from "nostr-tools/nip44";
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import { mkdir } from "node:fs/promises";
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const APP = process.env.APP || "http://localhost:3000";
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const LATENCY_MS = Number(process.env.LATENCY_MS ?? 100);
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const VIDEOS = Number(process.env.VIDEOS ?? 40);
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const WS_PORT = 8961;
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const SHOT_DIR = "artifacts/ux-harness";
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const toHex = (u8) => Buffer.from(u8).toString("hex");
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// --- Fake user identity (deterministic) ---
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const USER_SK = Uint8Array.from(Buffer.from("11".repeat(32), "hex"));
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const USER_PK = getPublicKey(USER_SK);
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// --- Extension call accounting + serialized latency queue ---
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const extCalls = {};
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let queue = Promise.resolve();
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function viaExtension(method, fn) {
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extCalls[method] = (extCalls[method] || 0) + 1;
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const run = async () => {
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if (LATENCY_MS > 0) await new Promise((r) => setTimeout(r, LATENCY_MS));
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return fn();
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};
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// Serialize like a real single-threaded extension.
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const p = queue.then(run, run);
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queue = p.catch(() => {});
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return p;
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}
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function nip44ConvKey(peerPk) {
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return nip44.v2.utils.getConversationKey(USER_SK, peerPk);
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}
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async function main() {
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await mkdir(SHOT_DIR, { recursive: true });
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const relay = startRelay(WS_PORT, { httpPort: false });
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const relayUrl = `ws://127.0.0.1:${WS_PORT}`;
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// Seed the user's NIP-65 relay list so the app talks ONLY to the mock relay
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// (not real relays) after login — keeps the harness isolated and deterministic.
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relay.seedEvent(
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finalizeEvent(
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{ kind: 10002, created_at: Math.floor(Date.now() / 1000), tags: [["r", relayUrl]], content: "" },
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USER_SK,
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),
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);
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// Seed a few videos so the feed has content (heavy/encrypted data comes in phase 2).
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const now = Math.floor(Date.now() / 1000);
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for (let i = 0; i < VIDEOS; i++) {
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const dTag = `seed-${i}`;
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const content = JSON.stringify({
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version: 3,
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title: `Harness Video ${i}`,
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videoRootId: dTag,
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mode: "dev",
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isPrivate: false,
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deleted: false,
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url: `https://example.com/v${i}.mp4`,
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});
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relay.seedEvent(
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finalizeEvent(
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{
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kind: 30078,
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created_at: now - i * 60,
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tags: [["d", dTag], ["t", "video"], ["title", `Harness Video ${i}`], ["url", `https://example.com/v${i}.mp4`]],
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content,
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},
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USER_SK,
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),
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);
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}
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console.log(`Seeded ${VIDEOS} videos. User pk=${USER_PK.slice(0, 12)}…`);
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const browser = await chromium.launch({ headless: process.env.HEADLESS !== "0" });
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const page = await browser.newPage({ viewport: { width: 1280, height: 900 } });
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// --- Expose Node-side crypto as the fake extension's backend ---
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await page.exposeFunction("__extGetPublicKey", () => viaExtension("getPublicKey", () => USER_PK));
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await page.exposeFunction("__extSignEvent", (event) =>
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viaExtension("signEvent", () => finalizeEvent({ ...event, pubkey: USER_PK }, USER_SK)),
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);
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await page.exposeFunction("__extNip04Encrypt", (pk, text) =>
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viaExtension("nip04.encrypt", () => nip04.encrypt(USER_SK, pk, text)),
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);
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await page.exposeFunction("__extNip04Decrypt", (pk, ct) =>
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viaExtension("nip04.decrypt", () => nip04.decrypt(USER_SK, pk, ct)),
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);
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await page.exposeFunction("__extNip44Encrypt", (pk, text) =>
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viaExtension("nip44.encrypt", () => nip44.v2.encrypt(text, nip44ConvKey(pk))),
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);
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await page.exposeFunction("__extNip44Decrypt", (pk, ct) =>
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viaExtension("nip44.decrypt", () => nip44.v2.decrypt(ct, nip44ConvKey(pk))),
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);
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// --- Inject window.nostr (the fake extension) before app code runs ---
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await page.addInitScript((url) => {
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localStorage.setItem("hasSeenDisclaimer", "true");
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localStorage.setItem("__bitvidTestMode__", "1");
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localStorage.setItem("__bitvidTestRelays__", JSON.stringify([url]));
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localStorage.setItem("bitvid_admin_whitelist_mode", "false");
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window.__bitvidTestRelays__ = [url];
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window.nostr = {
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getPublicKey: () => window.__extGetPublicKey(),
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signEvent: (event) => window.__extSignEvent(event),
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getRelays: async () => ({}),
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nip04: {
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encrypt: (pk, text) => window.__extNip04Encrypt(pk, text),
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decrypt: (pk, ct) => window.__extNip04Decrypt(pk, ct),
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},
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nip44: {
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encrypt: (pk, text) => window.__extNip44Encrypt(pk, text),
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decrypt: (pk, ct) => window.__extNip44Decrypt(pk, ct),
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v2: {
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encrypt: (pk, text) => window.__extNip44Encrypt(pk, text),
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decrypt: (pk, ct) => window.__extNip44Decrypt(pk, ct),
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},
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},
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};
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}, relayUrl);
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const logs = [];
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page.on("console", (m) => logs.push(`[${m.type()}] ${m.text()}`.slice(0, 300)));
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page.on("pageerror", (e) => logs.push(`[pageerror] ${String(e).split("\n")[0]}`));
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const t0 = Date.now();
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const testUrl = `${APP}/?__test__=1&__testRelays__=${encodeURIComponent(relayUrl)}`;
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await page.goto(testUrl, { waitUntil: "domcontentloaded" });
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await page.waitForFunction(() => typeof window.__bitvidTest__ === "object", { timeout: 20000 }).catch(() => {});
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await page.evaluate((url) => window.__bitvidTest__?.setTestRelays?.([url], { persist: false }), relayUrl).catch(() => {});
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// Verify the app sees our fake extension.
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const sawExtension = await page.evaluate(() => typeof window.nostr?.getPublicKey === "function");
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await page.screenshot({ path: `${SHOT_DIR}/01-loaded.png` });
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// Drive the real nip-07 login UI.
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let loginErr = null;
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try {
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await page.click('[data-testid="login-button"]', { timeout: 8000 });
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await page.waitForSelector('[data-testid="login-modal"]', { timeout: 8000 });
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await page.screenshot({ path: `${SHOT_DIR}/02-login-modal.png` });
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// Pick the extension provider button (first provider, or by text).
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const extBtn = page.getByRole("button", { name: /extension|nip-?07|browser/i }).first();
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if (await extBtn.count()) {
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await extBtn.click({ timeout: 5000 });
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} else {
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await page.locator('[data-testid="login-provider-button"]').first().click({ timeout: 5000 });
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}
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} catch (e) {
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loginErr = String(e).split("\n")[0];
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}
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await page.waitForTimeout(3000);
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const state = await page.evaluate(async () => {
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try {
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const s = await window.__bitvidTest__?.getAppState?.();
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return s || null;
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} catch (_) {
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return null;
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}
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});
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// Feed render timing + count.
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let firstCardMs = null;
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try {
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await page.waitForSelector("[data-video-id]", { timeout: 15000 });
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firstCardMs = Date.now() - t0;
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} catch (_) {}
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const cardCount = await page.evaluate(() => document.querySelectorAll("[data-video-id]").length);
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await page.screenshot({ path: `${SHOT_DIR}/03-after-login.png` });
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console.log("\n================ UX HARNESS (phase 1) ================");
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console.log(`App saw fake window.nostr: ${sawExtension}`);
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console.log(`Login UI error: ${loginErr || "none"}`);
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console.log(`Logged in: ${state?.isLoggedIn} as ${state?.activePubkey?.slice(0, 12)}…`);
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console.log(`Relays: ${JSON.stringify(state?.relays?.all)}`);
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console.log(`Time-to-first-video-card: ${firstCardMs === null ? "NEVER" : firstCardMs + "ms"} (${cardCount} cards)`);
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console.log(`Extension calls (latency=${LATENCY_MS}ms each): ${JSON.stringify(extCalls)}`);
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console.log(`Elapsed: ${Date.now() - t0}ms`);
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const interesting = logs.filter((l) => /error|warn|fail|login|nip07|extension|reject/i.test(l)).slice(0, 25);
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console.log(`\nConsole (filtered):`);
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interesting.forEach((l) => console.log(" " + l));
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console.log(`\nScreenshots in ${SHOT_DIR}/`);
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console.log("=====================================================\n");
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await browser.close();
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if (typeof relay.close === "function") await relay.close();
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process.exit(0);
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}
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main().catch((e) => {
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console.error("ux-harness failed:", e);
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process.exit(1);
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});
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