generated from coulomb/repo-seed
tegwick
7d00ae758e
OverlayEngine.apply: read-only target → KEPT_DRAFT; base_rev==current → fast-forward write-through (APPLIED, MERGE_DECIDED closes overlay); drift → REFUSED_DRIFT (no clobber, I-5). 5 tests green, pyflakes clean. (blueprint §8.6) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
67 lines
2.5 KiB
Python
67 lines
2.5 KiB
Python
"""Tests for apply-under-drift (SHARD-WP-0008 T4)."""
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from shard_wiki.adapters import FolderAdapter
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from shard_wiki.coordination import ApplyStatus, DecisionLog, OverlayEngine
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from shard_wiki.model import Identity
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def _writable(tmp_path, files):
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for rel, text in files.items():
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(tmp_path / rel).write_text(text, encoding="utf-8")
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return FolderAdapter("w", tmp_path, writable=True)
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def test_fast_forward_apply_writes_through(tmp_path):
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shard = _writable(tmp_path, {"Home.md": "old"})
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eng = OverlayEngine("space", DecisionLog())
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base = shard.current_rev("Home")
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ov = eng.draft(Identity("w", "Home"), "new", base_rev=base)
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result = eng.apply(ov.overlay_id, shard)
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assert result.status is ApplyStatus.APPLIED
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assert shard.read("Home").body == "new" # written through
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assert eng.get(ov.overlay_id) is None # overlay closed in the fold
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def test_drift_refuses_without_clobber(tmp_path):
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shard = _writable(tmp_path, {"Home.md": "old"})
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eng = OverlayEngine("space", DecisionLog())
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ov = eng.draft(Identity("w", "Home"), "mine", base_rev="STALE-REV")
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result = eng.apply(ov.overlay_id, shard)
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assert result.status is ApplyStatus.REFUSED_DRIFT
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assert shard.read("Home").body == "old" # not clobbered (I-5)
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assert eng.get(ov.overlay_id) is not None # overlay still open
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def test_read_only_target_keeps_draft(tmp_path):
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(tmp_path / "Home.md").write_text("canon", encoding="utf-8")
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ro = FolderAdapter("ro", tmp_path) # not writable
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eng = OverlayEngine("space", DecisionLog())
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ov = eng.draft(Identity("ro", "Home"), "my edit", base_rev=ro.current_rev("Home"))
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result = eng.apply(ov.overlay_id, ro)
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assert result.status is ApplyStatus.KEPT_DRAFT
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assert ro.read("Home").body == "canon" # source untouched
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assert eng.get(ov.overlay_id) is not None # local truth retained
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def test_new_page_fast_forwards(tmp_path):
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shard = _writable(tmp_path, {})
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eng = OverlayEngine("space", DecisionLog())
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ov = eng.draft(Identity("w", "Fresh"), "brand new", base_rev=None) # didn't exist
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result = eng.apply(ov.overlay_id, shard)
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assert result.status is ApplyStatus.APPLIED
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assert shard.read("Fresh").body == "brand new"
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def test_wrong_adapter_is_rejected(tmp_path):
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shard = _writable(tmp_path, {"Home.md": "x"})
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eng = OverlayEngine("space", DecisionLog())
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ov = eng.draft(Identity("other", "Home"), "y", base_rev=None)
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try:
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eng.apply(ov.overlay_id, shard)
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raise AssertionError("expected ValueError")
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except ValueError:
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pass
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