WIP: add argument for custom pre-request handler

test/fixtures/privileges.sql

@@ -4,7 +4,7 @@ GRANT USAGE ON SCHEMA
     , test
     , jwt
     , "تست"
-TO postgrest_test_anonymous;
+TO postgrest_test_anonymous, bad_role;
 
 -- Schema test objects
 SET search_path = test, "تست", pg_catalog;

test/fixtures/roles.sql

@@ -1,7 +1,8 @@
-DROP ROLE IF EXISTS postgrest_test_authenticator, postgrest_test_anonymous, postgrest_test_default_role, postgrest_test_author;
+DROP ROLE IF EXISTS postgrest_test_authenticator, postgrest_test_anonymous, postgrest_test_default_role, postgrest_test_author, bad_role;
 CREATE ROLE postgrest_test_authenticator WITH login noinherit;
 CREATE ROLE postgrest_test_anonymous;
 CREATE ROLE postgrest_test_default_role;
 CREATE ROLE postgrest_test_author;
+CREATE ROLE bad_role;
 
-GRANT postgrest_test_anonymous, postgrest_test_default_role, postgrest_test_author TO postgrest_test_authenticator;
+GRANT postgrest_test_anonymous, postgrest_test_default_role, postgrest_test_author, bad_role TO postgrest_test_authenticator;

test/fixtures/schema.sql

@@ -237,6 +237,14 @@ SELECT jwt.sign(
   ) r;
 $$;
 
+create function block_bad_role() returns void
+language plpgsql as $$
+begin
+  if current_role = 'bad_role' then
+    raise invalid_password using message = 'role is not allowed';
+  end if;
+end
+$$;
 
 --
 -- Name: reveal_big_jwt(); Type: FUNCTION; Schema: test; Owner: -