feat(products): canonical serializer skeleton — header + single product row (SD-0002 §6.5.5)

2026-06-11 21:57:48 -07:00
parent 011f4d5dc1
commit 627e257d4c
2 changed files with 150 additions and 0 deletions
@@ -0,0 +1,53 @@
+"""Canonical serializer + INV-12 round-trip lock (SD-0002 §6.5.5, §6.8)."""
+import csv
+import io
+
+from app.domains.products import serialize
+from app.domains.products.diff import CatalogImage, CatalogProduct, CatalogVariant
+
+
+def _product(**kw) -> CatalogProduct:
+    """A minimal no-option catalog product (one all-NULL variant)."""
+    base = dict(
+        id=1, handle="moon-mug", title="Moon Mug",
+        option_names=(None, None, None),
+        fields={
+            "title": "Moon Mug", "description_html": None, "vendor": "Acme",
+            "product_type": "standalone", "google_product_category": None,
+            "tags": [], "status": "active", "published": True,
+        },
+        variants=[CatalogVariant(
+            id=1, options=(None, None, None), position=1,
+            fields={"sku": "WG-MUG", "barcode": None, "price": None, "cost": None,
+                    "weight": None, "weight_unit": None, "volume": None,
+                    "volume_unit": None, "tax_id_1": None, "tax_id_2": None,
+                    "inventory_tracker": None, "inventory_qty": None,
+                    "variant_image": None})],
+        images=[],
+    )
+    base.update(kw)
+    return CatalogProduct(**base)
+
+
+def _rows(products) -> list[dict]:
+    text = "".join(serialize.catalog_to_csv(products))
+    return list(csv.DictReader(io.StringIO(text)))
+
+
+def test_header_is_full_canonical_set():
+    text = "".join(serialize.catalog_to_csv([_product()]))
+    header = next(csv.reader(io.StringIO(text)))
+    # Handle + Title first; every known column present exactly once.
+    assert header[0] == "Handle"
+    assert "Title" in header and "Variant SKU" in header and "Image Src" in header
+    assert len(header) == len(set(header))
+
+
+def test_single_no_option_product_one_row():
+    rows = _rows([_product()])
+    assert len(rows) == 1
+    assert rows[0]["Handle"] == "moon-mug"
+    assert rows[0]["Title"] == "Moon Mug"
+    assert rows[0]["Variant SKU"] == "WG-MUG"
+    # A no-option product emits no option values.
+    assert rows[0]["Option1 Value"] == ""