52 lines
2.6 KiB
Python
52 lines
2.6 KiB
Python
"""The falsification-verdict seam — load-bearing gates for reading OKF provenance.
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This module opens with the ONE thing that has to be captured before any decoder exists: the
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bytes today's ``bundle_context`` renders from a **block-form** provenance bundle. Later steps
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add a decoder that reads ``verified``/``sources`` in that form; this gate is what proves the
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decoder did not move the read-context on its way in.
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The comparison is **byte-for-byte**, with no trailing-whitespace normalisation. The commons
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nav-goldens normalise because commons owns their line endings and this repo consumes them
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through a pull-only subtree; ``tests/golden/block-form-provenance/`` is repo-owned, so the
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stricter comparison is available and is what the criterion asks for.
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The resolver below is LOCAL on purpose. ``tests/test_okf.py::_nav_golden`` hard-codes
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``shared/examples/`` (``test_okf.py:51``) and lives in a module this work must not touch, so
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reusing it would mean editing a frozen module to reach a repo-owned fixture.
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"""
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from __future__ import annotations
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from pathlib import Path
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from portfolio_optimiser import okf
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_GOLDEN_DIR = Path(__file__).resolve().parents[1] / "tests" / "golden" / "block-form-provenance"
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def _block_form_golden() -> tuple[str, str]:
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"""The repo-owned block-form case: ``(bundle_dir, expected_read_context)``."""
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return (
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str(_GOLDEN_DIR / "bundle"),
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(_GOLDEN_DIR / "expected-read-context.md").read_text(encoding="utf-8"),
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)
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def test_block_form_bundle_renders_the_captured_bytes() -> None:
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"""Navigation is TOLERANT of block-form provenance, and these are the bytes it produces.
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Two claims in one arm, and both are load-bearing. First, ``navigate_bundle`` reaches every
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file and skips nothing — a block ``verified:`` sequence is ordinary frontmatter to a
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line-oriented parser, so it must not break navigation, and ``skipped`` being empty is the
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positive statement that no link was silently passed over. Second, the rendered read-context
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is byte-identical to the committed fasit. The fasit was generated by the code that predates
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any decoder work: if it were regenerated afterwards, the comparison would prove an
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implementation identical to itself and nothing else.
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"""
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bundle_dir, expected = _block_form_golden()
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bundle = okf.navigate_bundle(bundle_dir)
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assert bundle.skipped == (), f"navigation skipped a link it should have followed: {bundle.skipped}"
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assert [f.name for f in bundle.files] == ["index.md", "attested.md", "multi-verified.md"]
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assert okf.bundle_context(bundle) == expected
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