test: add manabox parser tests

backend/tests/test_manabox.py

@@ -0,0 +1,76 @@
+"""
+Tests for manabox.py — CSV parsing with foil/non-foil merging.
+"""
+import pytest
+from app.services.imports.manabox import parse
+
+
+class TestManaboxCSV:
+    def _csv(self, header, rows):
+        lines = [header] + rows
+        return "\n".join(lines).encode("utf-8")
+
+    def test_standard_columns(self):
+        data = self._csv(
+            "Name,Set code,Collector number,Foil,Quantity",
+            ["Sol Ring,cmm,1,No,2"]
+        )
+        result = parse(data)
+        assert len(result) == 1
+        assert result[0].card_name == "Sol Ring"
+        assert result[0].quantity == 2
+        assert result[0].foil_quantity == 0
+
+    def test_foil_row(self):
+        data = self._csv(
+            "Name,Set code,Collector number,Foil,Quantity",
+            ["Sol Ring,cmm,1,Yes,1"]
+        )
+        result = parse(data)
+        assert result[0].quantity == 0
+        assert result[0].foil_quantity == 1
+
+    def test_foil_and_nonfoil_merged(self):
+        data = self._csv(
+            "Name,Set code,Collector number,Foil,Quantity",
+            [
+                "Sol Ring,cmm,1,No,2",
+                "Sol Ring,cmm,1,Yes,1"
+            ]
+        )
+        result = parse(data)
+        assert len(result) == 1
+        assert result[0].quantity == 2
+        assert result[0].foil_quantity == 1
+
+    def test_different_cards_not_merged(self):
+        data = self._csv(
+            "Name,Set code,Collector number,Foil,Quantity",
+            [
+                "Sol Ring,cmm,1,No,1",
+                "Command Tower,cmm,2,No,1"
+            ]
+        )
+        result = parse(data)
+        assert len(result) == 2
+
+    def test_foil_bool_variations(self):
+        for foil_val in ["Yes", "yes", "1", "true", "True", "y"]:
+            data = self._csv(
+                "Name,Set code,Collector number,Foil,Quantity",
+                [f"Sol Ring,cmm,1,{foil_val},1"]
+            )
+            result = parse(data)
+            assert result[0].foil_quantity == 1, f"Failed for foil value: {foil_val}"
+
+    def test_empty_csv_raises(self):
+        with pytest.raises(ValueError):
+            parse(b"")
+
+    def test_set_code_lowercased(self):
+        data = self._csv(
+            "Name,Set code,Collector number,Foil,Quantity",
+            ["Sol Ring,CMM,1,No,1"]
+        )
+        result = parse(data)
+        assert result[0].set_code == "cmm"