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50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
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"""Drift-detection tests for the migration runner (v0.9.18).
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`find_drift` is a pure function so the divergence logic is verified without a
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database -- the suite runs identically as `zvx` or `central`.
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"""
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from pathlib import Path
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from central.migrate import find_drift
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def _discovered(*versions: str) -> list[tuple[str, Path]]:
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"""Build a discover_migrations-shaped list from version stems."""
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return [(v, Path(f"sql/migrations/{v}.sql")) for v in versions]
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def test_find_drift_untracked_file():
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"""A migration file on disk with no schema_migrations row is untracked.
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This is the v0.9.18 case: 025-029 existed on disk but were never recorded.
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"""
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applied = {"001_a", "002_b"}
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discovered = _discovered("001_a", "002_b", "003_c")
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untracked, orphan = find_drift(applied, discovered)
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assert untracked == ["003_c"]
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assert orphan == []
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def test_find_drift_orphan_row():
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"""A schema_migrations row with no matching .sql file is an orphan."""
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applied = {"001_a", "002_b", "099_removed"}
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discovered = _discovered("001_a", "002_b")
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untracked, orphan = find_drift(applied, discovered)
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assert untracked == []
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assert orphan == ["099_removed"]
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def test_find_drift_clean():
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"""No drift when disk and schema_migrations match exactly."""
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applied = {"001_a", "002_b", "003_c"}
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discovered = _discovered("001_a", "002_b", "003_c")
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untracked, orphan = find_drift(applied, discovered)
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assert untracked == []
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assert orphan == []
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