func XCTResultSuccess<T: Equatable, E>(Result<T, E>, T) func XCTResultFailure<T, E>(Result<T,E>, (E)->Bool) これ作っておけば成功はワンライン、失敗はcast一回で済みそう (edited)func XCTResultSuccess<T: Equatable, E>(Result<T, E>, T) func XCTResultFailure<T, E>(Result<T,E>, (E)->Bool) これ作っておけば成功はワンライン、失敗はcast一回で済みそう (edited)