ci(release): enforce changed-scope Ruff gate

tests/release/test_ruff_ratchet.py

@@ -1,24 +1,33 @@
-from scripts.ruff_ratchet import BASELINE_BY_RULE, BASELINE_TOTAL, baseline_regressions
+from collections import Counter
+
+from scripts.ruff_ratchet import normalized_findings
 
 
-def _diagnostics(**counts: int) -> list[dict[str, str]]:
-    return [{"code": code} for code, count in counts.items() for _ in range(count)]
+def test_normalized_findings_ignore_line_number_changes(tmp_path):
+    source = tmp_path / "sample.py"
+    source.write_text("\nvalue = missing\n", encoding="utf-8")
+    diagnostics = [
+        {
+            "filename": str(source),
+            "code": "F821",
+            "message": "Undefined name `missing`",
+            "location": {"row": 2, "column": 9},
+        }
+    ]
+
+    assert normalized_findings(diagnostics, tmp_path) == Counter(
+        {("sample.py", "F821", "Undefined name `missing`", "value = missing"): 1}
+    )
 
 
-def test_exact_baseline_passes() -> None:
-    diagnostics = _diagnostics(**BASELINE_BY_RULE)
-    assert len(diagnostics) == BASELINE_TOTAL
-    assert baseline_regressions(diagnostics) == []
+def test_normalized_findings_preserve_duplicate_count(tmp_path):
+    source = tmp_path / "sample.py"
+    source.write_text("missing\n", encoding="utf-8")
+    diagnostic = {
+        "filename": str(source),
+        "code": "F821",
+        "message": "Undefined name `missing`",
+        "location": {"row": 1, "column": 1},
+    }
 
-
-def test_new_rule_fails_from_zero_baseline() -> None:
-    assert baseline_regressions([{"code": "E501"}]) == ["E501: 1 > 0"]
-
-
-def test_existing_rule_increase_fails() -> None:
-    diagnostics = _diagnostics(I001=BASELINE_BY_RULE["I001"] + 1)
-    assert baseline_regressions(diagnostics) == ["I001: 91 > 90"]
-
-
-def test_reduced_debt_passes() -> None:
-    assert baseline_regressions(_diagnostics(I001=1, F401=1)) == []
+    assert normalized_findings([diagnostic, diagnostic], tmp_path).total() == 2