test(pyramid/predicates): Add tests to check entity view without guest account

* Validate changeset f3b46587ea1f by testing if an entity view return a 403
  status error for guests when the cubicweb instance do not allowed anonymous
  connection

cubicweb/pyramid/test/test_predicates.py

@@ -5,6 +5,28 @@ def simple_test_view(request):
     return request.response
 
 
+class AnonymousDisallowedPredicatesTC(PyramidCWTest):
+    anonymous_allowed = False
+    settings = {"cubicweb.bwcompat": True}
+
+    def includeme(self, config):
+        config.add_route("view-entity", r"/{eid}", has_cw_permission="read")
+        config.add_view(simple_test_view, route_name="view-entity")
+
+    def setUp(self):
+        super(AnonymousDisallowedPredicatesTC, self).setUp()
+        with self.admin_access.repo_cnx() as cnx:
+            self.eid = self.create_user(cnx, "Fernestin").eid
+            cnx.commit()
+
+    def test_view_entity_without_connection(self):
+        self.webapp.get(f"/{self.eid}", status=403)
+
+    def test_view_entity_with_connection(self):
+        self.login()
+        self.webapp.get(f"/{self.eid}", status=200)
+
+
 class PredicatesTC(PyramidCWTest):
     def includeme(self, config):
         # to test route predicate