[FIX] website_sale_product_attribute_value_filter_existing: Add attri…

…bute ‘Test yellow'

It is being checked that the attribute ‘Test yellow’ is not present in
the filter panel as it is not being used in any product.
Actually, no real check is being made if the attribute is not defined.
It is a fact, if it is not defined, it does not exist and will not be
present at all.

website_sale_product_attribute_value_filter_existing/tests/test_website_sale_product_attribute_value_filter_existing.py

@@ -28,6 +28,9 @@ def setUpClass(cls):
         cls.product_attribute_value_blue = ProductAttributeValue.create(
             {"name": "Test blue", "attribute_id": cls.product_attribute.id}
         )
+        cls.product_attribute_value_yellow = ProductAttributeValue.create(
+            {"name": "Test yellow", "attribute_id": cls.product_attribute.id}
+        )
         cls.product_template = cls.env.ref("product.product_product_4_product_template")
         cls.product_attribute_line = ProductAttributeLine.create(
             {