55 lines
1.7 KiB
Python
55 lines
1.7 KiB
Python
# -*- coding: utf-8 -*-
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"""Visual regression snapshot contract checks for migration-critical states."""
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from __future__ import annotations
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import hashlib
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import json
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from pathlib import Path
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ROOT = Path(__file__).resolve().parents[1]
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SNAPSHOT_FILE = (
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ROOT / "docs" / "migration" / "portal-shell-route-view-integration" / "visual-regression-snapshots.json"
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)
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def _read_json(path: Path) -> dict:
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return json.loads(path.read_text(encoding="utf-8"))
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def _sha256_text(text: str) -> str:
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return hashlib.sha256(text.encode("utf-8")).hexdigest()
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def _compute_fingerprint(files: list[str]) -> str:
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lines: list[str] = []
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for rel in files:
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path = ROOT / rel
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assert path.exists(), f"snapshot file missing: {rel}"
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digest = hashlib.sha256(path.read_bytes()).hexdigest()
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lines.append(rel)
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lines.append(digest)
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payload = "\n".join(lines) + "\n"
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return _sha256_text(payload)
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def test_visual_snapshot_policy_blocks_release_on_critical_diff():
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payload = _read_json(SNAPSHOT_FILE)
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policy = payload["critical_diff_policy"]
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assert policy["block_release"] is True
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assert policy["severity"] == "critical"
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def test_visual_snapshot_fingerprints_match_current_sources():
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payload = _read_json(SNAPSHOT_FILE)
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snapshots = payload.get("snapshots", [])
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assert snapshots, "no visual snapshot entries"
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for item in snapshots:
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files = item.get("files", [])
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expected = str(item.get("fingerprint", "")).strip()
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assert files and expected, f"invalid snapshot entry: {item.get('id')}"
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actual = _compute_fingerprint(files)
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assert actual == expected, f"critical visual snapshot diff: {item.get('id')}"
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