use crate::tokenizer::{NyashTokenizer, TokenType};

fn collect_string_token(src: &str) -> String {
    let mut t = NyashTokenizer::new(src);
    let tokens = t.tokenize().expect("tokenize");
    // Expect first non-EOF token to be STRING
    for tok in tokens {
        if let TokenType::STRING(s) = tok.token_type { return s; }
    }
    panic!("no STRING token found");
}

#[test]
fn unicode_decode_toggle_off_keeps_literal() {
    // OFF by default
    std::env::remove_var("NYASH_PARSER_DECODE_UNICODE");
    std::env::remove_var("HAKO_PARSER_DECODE_UNICODE");
    let s = collect_string_token("\"\\u0041\"");
    assert_eq!(s, "\\u0041");
}

#[test]
fn unicode_decode_toggle_on_decodes_basic_and_surrogate() {
    // ON: enable decode
    std::env::set_var("NYASH_PARSER_DECODE_UNICODE", "1");
    let s = collect_string_token("\"\\u0041\"");
    assert_eq!(s, "A");

    let s2 = collect_string_token("\"\\uD83D\\uDE00\"");
    // Expect surrogate pair to decode into one char (😀)
    assert_eq!(s2.chars().count(), 1);
}