P5-4418 validate Pwinty SKU code

tests/resources/test_prices.py

@@ -4,6 +4,7 @@ from api import create_app, db
 from api.models.product import Material, Product
 from api.models.inquiry import Inquiry
 from api.models.designer import Designer
+from api.lib import pwinty
 
 
 class TestEndpoints(flask_testing.TestCase):
@@ -209,3 +210,13 @@ class TestEndpoints(flask_testing.TestCase):
         self.assert200(response)
         expected = [{"price": 557.5, "price_excl_vat": 446, "sku": "GLOBAL-CFP-12x12"}]
         self.assertEqual(expected, response.json["data"])
+
+    def test_framed_print_invalid_sku(self):
+        response = self.client.get("/prices/framed-print?sku=invalid&territory=SE")
+        self.assert400(response)
+        self.assertEqual(
+            "sku contains an invalid value, must be one of: {}".format(
+                pwinty.SKU_CODES
+            ),
+            response.json["message"],
+        )