104 lines
3.1 KiB
Python
104 lines
3.1 KiB
Python
from __future__ import annotations
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import hashlib
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import re
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from pathlib import Path
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APP_ROOT = Path(__file__).resolve().parents[1]
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ORIGINAL_ROOT = APP_ROOT.parent
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FRONTEND_ROOT = APP_ROOT / "frontend"
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ORIGINAL_STATIC = ORIGINAL_ROOT / "static"
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SOURCE_RANGE = re.compile(
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r"/\* PRESERVATION-SOURCE-BEGIN app\.js:(\d+)-(\d+) \*/\n"
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r"(.*?)"
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r"/\* PRESERVATION-SOURCE-END app\.js:\1-\2 \*/\n?",
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re.DOTALL,
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)
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# These exact original app.js line ranges were retired in slice 11 after the
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# definition-only symbols passed static, runtime, and compatibility review.
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RETIRED_FRONTEND_SOURCE_RANGES = (
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(3537, 3540),
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(4139, 4145),
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(4973, 4989),
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(9022, 9027),
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(9052, 9055),
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)
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AUDITED_FRONTEND_SOURCE_LINE_COUNT = 9283
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def sha256(path: Path) -> str:
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return hashlib.sha256(path.read_bytes()).hexdigest()
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def reassembled_frontend_runtime() -> str:
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chunks: dict[tuple[int, int], str] = {}
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for path in FRONTEND_ROOT.rglob("*.js"):
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for match in SOURCE_RANGE.finditer(path.read_text(encoding="utf-8")):
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source_range = (int(match.group(1)), int(match.group(2)))
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if source_range in chunks:
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raise AssertionError(f"duplicate app.js source range: {source_range}")
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chunks[source_range] = match.group(3)
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assembled: list[str] = []
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next_line = 1
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for (start, end), content in sorted(chunks.items()):
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if start != next_line:
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raise AssertionError(
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f"app.js source coverage gap: expected line {next_line}, got {start}"
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)
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assembled.append(content)
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next_line = end + 1
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if next_line != AUDITED_FRONTEND_SOURCE_LINE_COUNT + 1:
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raise AssertionError(
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"app.js source coverage ended at "
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f"{next_line - 1}, expected {AUDITED_FRONTEND_SOURCE_LINE_COUNT}"
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)
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return "".join(assembled)
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def original_runtime_after_audited_retirements() -> str:
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lines = (ORIGINAL_STATIC / "app.js").read_text(encoding="utf-8").splitlines(
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keepends=True
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)
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retired = {
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line_number
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for start, end in RETIRED_FRONTEND_SOURCE_RANGES
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for line_number in range(start, end + 1)
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}
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return "".join(
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line for line_number, line in enumerate(lines, start=1) if line_number not in retired
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)
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def assert_frontend_runtime_matches_audited_baseline(testcase) -> None:
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testcase.assertEqual(
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reassembled_frontend_runtime(),
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original_runtime_after_audited_retirements(),
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)
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def assert_moved_asset_matches(
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testcase,
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original_relative: str,
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frontend_relative: str | None = None,
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) -> None:
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target_relative = frontend_relative or original_relative
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testcase.assertEqual(
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sha256(FRONTEND_ROOT / target_relative),
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sha256(ORIGINAL_STATIC / original_relative),
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original_relative,
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)
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def assert_page_prefix_matches(testcase, page_relative: str) -> None:
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original = (ORIGINAL_STATIC / page_relative).read_text(encoding="utf-8")
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migrated = (FRONTEND_ROOT / page_relative).read_text(encoding="utf-8")
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testcase.assertTrue(
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migrated.startswith(original.rstrip("\n") + "\n\n"),
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page_relative,
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)
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