use sana::{Spanned, Sana};

#[test]
fn everything_is_an_error() {
    #[derive(Debug, Clone, Copy, PartialEq, Sana)]
    pub enum Token {
        #[error]
        Error,
    }
    let input = "asd";
    let mut lexer = Token::lexer(&input);

    let tok = lexer.next().unwrap();
    assert_eq!(tok, Spanned{ value: Token::Error, start: 0, end: 0 });
}

#[test]
fn error_after_match() {
    #[derive(Debug, Clone, Copy, PartialEq, Sana)]
    pub enum Token {
        #[token("x")]
        X,
        #[error]
        Error,
    }
    let input = "xyz";
    let mut lexer = Token::lexer(&input);

    let tok = lexer.next().unwrap();
    assert_eq!(tok, Spanned{ value: Token::X, start: 0, end: 1 });

    let tok = lexer.next().unwrap();
    assert_eq!(tok, Spanned{ value: Token::Error, start: 1, end: 1 });

    let tok = lexer.next().unwrap(); // still an error
    assert_eq!(tok, Spanned{ value: Token::Error, start: 1, end: 1 });
}