message: Change Helper::test_error assert_eq! param order,
  expected first, and then found.
  Rust compilers show expected first on compile error, so make it looks similar
diff: @@ -58,8 +58,8 @@ pub trait Helper<T: 'static + Debug> {
  let result = self.run(sql);
  match (result.unwrap_err(), expected) {
  - (Error::Execute(found), Error::Execute(expected)) => assert_eq!(found, expected),
  - (Error::Select(found), Error::Select(expected)) => assert_eq!(found, expected),
  + (Error::Execute(found), Error::Execute(expected)) => assert_eq!(expected, found),
  + (Error::Select(found), Error::Select(expected)) => assert_eq!(expected, found),
  (found, expected) => panic!(
  "\n\n test: {}\nexpected: {:?}\n found: {:?}\n\n",
  sql, expected, found
  