Count Calico rows dropped as blank placeholders or unmatched references 🟥

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

infrastructure/condition/parsing/calico_parser.py

@@ -16,6 +16,18 @@ logger = setup_logger()
 class CalicoParser(Parser):
     def __init__(self, uprn_lookup: UprnLookup) -> None:
         self._uprn_lookup = uprn_lookup
+        self._blank_placeholder_count = 0
+        self._unmatched_reference_count = 0
+
+    @property
+    def blank_placeholder_count(self) -> int:
+        """Rows dropped on parse for a blank / N/A covering type."""
+        return self._blank_placeholder_count
+
+    @property
+    def unmatched_reference_count(self) -> int:
+        """Distinct asset references dropped for not resolving to a portfolio UPRN."""
+        return self._unmatched_reference_count
 
     def parse(self, file_stream: BinaryIO) -> List[CalicoProperty]:
         workbook = load_workbook(file_stream, data_only=True)

tests/condition/parsing/test_calico_parser.py

@@ -40,6 +40,28 @@ def _workbook(rows: List[List[object]]) -> BytesIO:
     return buffer
 
 
+def test_calico_parser_counts_blank_and_unmatched_drops():
+    # Arrange -- one loaded, one blank placeholder, one unmatched (not in lookup)
+    workbook = _workbook(
+        [
+            [443, "HOUSE", "31 Venice Avenue", "Roof Covering", "Concrete Tiles",
+             date(1998, 4, 1), 55, 36],
+            [438, "FLAT", "137 Brownhill Avenue", "Roof Covering", "N/A",
+             date(2000, 4, 1), 0, 973],
+            [777, "HOUSE", "8 Marine Avenue", "Roof Covering", "Natural Slate",
+             date(2010, 4, 1), 60, 50],
+        ]
+    )
+    parser = CalicoParser(FakeUprnLookup({"443": 100093305101}))
+
+    # Act
+    parser.parse(workbook)
+
+    # Assert
+    assert parser.blank_placeholder_count == 1
+    assert parser.unmatched_reference_count == 1
+
+
 def test_calico_parser_drops_na_sentinel_covering_rows():
     # Arrange -- Calico writes the literal string "N/A" for a placeholder row
     # (no roof-covering record captured), not an empty cell.