59 lines
2.4 KiB
Python
59 lines
2.4 KiB
Python
import json
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import os
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import shutil
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from pathlib import Path
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try:
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from playwright.sync_api import sync_playwright
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except ImportError as exc:
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raise SystemExit(
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"Playwright is required for visual evaluation; install requirements-eval.txt"
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) from exc
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browser_binary = os.environ.get("MMO_CHROMIUM_BIN") or shutil.which("chromium")
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if not browser_binary:
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raise SystemExit("a Chromium binary is required for real-browser visual evaluation")
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page_url = Path("index.html").resolve().as_uri()
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viewports = {
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"desktop": {"width": 1440, "height": 900},
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"mobile": {"width": 390, "height": 844},
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}
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metadata = {"engine": "playwright", "browser_binary": browser_binary, "viewports": {}}
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with sync_playwright() as playwright:
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browser = playwright.chromium.launch(headless=True, executable_path=browser_binary)
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try:
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for name, viewport in viewports.items():
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page = browser.new_page(viewport=viewport, device_scale_factor=1)
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page.goto(page_url, wait_until="networkidle")
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page.screenshot(path=f"actual-{name}.png", full_page=False)
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facts = page.evaluate(
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"""
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() => ({
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title: document.title,
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language: document.documentElement.lang,
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mainCount: document.querySelectorAll('main').length,
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navCount: document.querySelectorAll('nav').length,
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headingCount: document.querySelectorAll('h1, h2').length,
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labeledCount: document.querySelectorAll('[aria-label], label[for]').length,
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focusableCount: document.querySelectorAll(
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'a[href], button, input, select, textarea, [tabindex]:not([tabindex="-1"])'
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).length,
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unlabeledImages: [...document.images].filter(
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image => !image.alt && image.getAttribute('role') !== 'presentation'
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).length,
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horizontalOverflow: document.documentElement.scrollWidth > innerWidth + 1,
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bodyWidth: document.body.getBoundingClientRect().width,
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})
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"""
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)
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metadata["viewports"][name] = {**viewport, **facts}
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page.close()
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finally:
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browser.close()
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Path("render-metadata.json").write_text(
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json.dumps(metadata, indent=2, sort_keys=True) + "\n", encoding="utf-8"
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)
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