\set ECHO none
-- You should write your tests
SELECT jsonrpc.execute('
{
  "jsonrpc": "2.0",
  "method": "subtract",
  "params": [
    23,
    42
  ],
  "id": 2
}
');
                                           execute                                            
----------------------------------------------------------------------------------------------
 {"id" : "2", "jsonrpc" : "2.0", "error" : {"code" : -32601, "message" : "Method not found"}}
(1 row)

ROLLBACK;