Fix brand-only and price-aware ranking

tests/test_matcher.py

@@ -134,12 +134,49 @@ def test_makita_transliterations_share_the_same_brand_alias(
 
     assert result.status == "ambiguous"
     assert [candidate.sku for candidate in result.candidates] == [
-        "INS-0010",
         "INS-0017",
+        "INS-0010",
         "INS-0003",
     ]
 
 
+def test_cheap_preference_orders_candidates_by_ascending_price(
+    matcher: CatalogMatcher,
+) -> None:
+    result = matcher.match("шуруповерт как у макиты, только дешевле")
+    prices_by_sku = {item.sku: item.price for item in matcher.items}
+    candidate_prices = [
+        prices_by_sku[candidate.sku] for candidate in result.candidates
+    ]
+
+    assert candidate_prices == sorted(candidate_prices)
+
+
+@pytest.mark.parametrize(
+    "brand", ["ToolKraft", "toolkraft", "тулкрафт", "тул крафт"]
+)
+def test_brand_only_toolkraft_query_returns_catalog_items(
+    matcher: CatalogMatcher, brand: str
+) -> None:
+    result = matcher.match(brand)
+
+    assert result.status == "ambiguous"
+    assert [candidate.sku for candidate in result.candidates] == [
+        "INS-0022",
+        "INS-0023",
+        "INS-0024",
+    ]
+
+
+def test_unknown_toolkraft_model_does_not_fall_back_to_brand_results(
+    matcher: CatalogMatcher,
+) -> None:
+    result = matcher.match("ToolKraft TK-999")
+
+    assert result.status == "not_found"
+    assert result.candidates == []
+
+
 @pytest.mark.parametrize("query", ["шурпуоверт на 12в", "шураыввавёрт на 12в"])
 def test_product_type_survives_typos(matcher: CatalogMatcher, query: str) -> None:
     result = matcher.match(query)