File size: 3,715 Bytes
bee9bbb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 | """Capture anonymous public Coursera rasters for the current visual baseline.
GET-only, approved-origin capture of https://www.coursera.org/ at the
acceptance viewport 1692x979. Screenshots are stored under
source-evidence/visual-baseline-2026-08-21/ and contain no credentials,
cookies, storage state, or entered values. The cookie consent surface is
dismissed so region comparisons are not skewed by a dynamic banner.
"""
from __future__ import annotations
import argparse
from pathlib import Path
SOURCE_EVIDENCE_DIR = Path(__file__).resolve().parents[1] / "source-evidence"
OUTPUT_DIR = SOURCE_EVIDENCE_DIR / "visual-baseline-2026-08-21"
VIEWPORT = {"width": 1692, "height": 979}
ROUTES = {
"home": "https://www.coursera.org/",
"browse": "https://www.coursera.org/browse",
"search": "https://www.coursera.org/search?q=deep+learning",
"specialization": "https://www.coursera.org/specializations/deep-learning",
"course": "https://www.coursera.org/learn/neural-networks-deep-learning",
"login": "https://www.coursera.org/login",
"help": "https://www.coursera.org/help",
"not-found": "https://www.coursera.org/websitebench-nonexistent-route",
}
def main() -> int:
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument("--overwrite", action="store_true")
args = parser.parse_args()
for name, url in ROUTES.items():
output = OUTPUT_DIR / f"{name}.png"
if output.exists() and not args.overwrite:
raise FileExistsError(
f"refusing to overwrite {output}; re-run with --overwrite"
)
try:
from playwright.sync_api import sync_playwright
except ImportError as error: # pragma: no cover - dependency is declared
raise RuntimeError("Playwright is required to capture source visuals") from error
OUTPUT_DIR.mkdir(parents=True, exist_ok=True)
captured: list[str] = []
with sync_playwright() as runtime:
browser = runtime.chromium.launch()
context = browser.new_context(viewport=VIEWPORT, device_scale_factor=1)
try:
for name, url in ROUTES.items():
page = context.new_page()
try:
response = page.goto(url, wait_until="domcontentloaded", timeout=45000)
if response is None or response.status not in {200, 404}:
raise RuntimeError(f"{name}: unexpected source response")
page.wait_for_timeout(4000)
# Dismiss the cookie consent surface if present so the
# captured region is the stable page, not the banner.
for candidate in (
"button[data-e2e='cookie-banner-reject']",
"button:has-text('Reject')",
"button:has-text('Reject all')",
):
button = page.locator(candidate).first
try:
if button.is_visible(timeout=2000):
button.click(timeout=3000)
page.wait_for_timeout(1500)
break
except Exception:
continue
output = OUTPUT_DIR / f"{name}.png"
page.screenshot(path=str(output))
captured.append(str(output))
finally:
page.close()
finally:
context.close()
browser.close()
for path in captured:
print(path)
return 0
if __name__ == "__main__": # pragma: no cover
raise SystemExit(main())
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