#[test]
fn empty_regex_empty_match() {
    let re = regex!("");
    assert_eq!(vec![(0, 0)], findall!(re, ""));
}

#[test]
fn empty_regex_nonempty_match() {
    let re = regex!("");
    assert_eq!(vec![(0, 0), (1, 1), (2, 2), (3, 3)], findall!(re, "abc"));
}

#[test]
fn one_zero_length_match() {
    let re = regex!(r"\d*");
    assert_eq!(vec![(0, 0), (1, 2), (3, 4)], findall!(re, "a1b2"));
}

#[test]
fn many_zero_length_match() {
    let re = regex!(r"\d*");
    assert_eq!(vec![(0, 0), (1, 2), (3, 3), (4, 4), (5, 6)],
               findall!(re, "a1bbb2"));
}

#[test]
fn many_sequential_zero_length_match() {
    let re = regex!(r"\d?");
    assert_eq!(vec![(0, 0), (1, 2), (2, 3), (4, 5), (6, 6)],
               findall!(re, "a12b3c"));
}

#[test]
fn quoted_bracket_set() {
    let re = regex!(r"([\x{5b}\x{5d}])");
    assert_eq!(vec![(0, 1), (1, 2)], findall!(re, "[]"));
    let re = regex!(r"([\[\]])");
    assert_eq!(vec![(0, 1), (1, 2)], findall!(re, "[]"));
}

#[test]
fn first_range_starts_with_left_bracket() {
    let re = regex!(r"([[-z])");
    assert_eq!(vec![(0, 1), (1, 2)], findall!(re, "[]"));
}

#[test]
fn range_ends_with_escape() {
    let re = regex!(r"([\[-\x{5d}])");
    assert_eq!(vec![(0, 1), (1, 2)], findall!(re, "[]"));
}

#[test]
fn empty_match_find_iter() {
    let re = regex!(r".*?");
    assert_eq!(vec![(0, 0), (1, 1), (2, 2), (3, 3)], findall!(re, "abc"));
}

#[test]
fn empty_match_captures_iter() {
    let re = regex!(r".*?");
    let ms: Vec<_> = re.captures_iter(text!("abc"))
                       .map(|c| c.pos(0).unwrap())
                       .collect();
    assert_eq!(ms, vec![(0, 0), (1, 1), (2, 2), (3, 3)]);
}

#[test]
fn capture_names() {
    let re = regex!(r"(.)(?P<a>.)");
    assert_eq!(3, re.captures_len());
    assert_eq!((3, Some(3)), re.capture_names().size_hint());
    assert_eq!(vec![None, None, Some("a")],
               re.capture_names().collect::<Vec<_>>());
}

#[test]
fn regex_string() {
    assert_eq!(r"[a-zA-Z0-9]+", regex!(r"[a-zA-Z0-9]+").as_str());
    assert_eq!(r"[a-zA-Z0-9]+", &format!("{}", regex!(r"[a-zA-Z0-9]+")));
    assert_eq!(r"[a-zA-Z0-9]+", &format!("{:?}", regex!(r"[a-zA-Z0-9]+")));
}

#[test]
fn capture_index() {
    let re = regex!(r"^(?P<name>.+)$");
    let cap = re.captures(t!("abc")).unwrap();
    assert_eq!(&cap[0], t!("abc"));
    assert_eq!(&cap[1], t!("abc"));
    assert_eq!(&cap["name"], t!("abc"));
}

#[test]
#[should_panic]
#[cfg_attr(all(target_env = "msvc", target_pointer_width = "32"), ignore)]
fn capture_index_panic_usize() {
    let re = regex!(r"^(?P<name>.+)$");
    let cap = re.captures(t!("abc")).unwrap();
    let _ = cap[2];
}

#[test]
#[should_panic]
#[cfg_attr(all(target_env = "msvc", target_pointer_width = "32"), ignore)]
fn capture_index_panic_name() {
    let re = regex!(r"^(?P<name>.+)$");
    let cap = re.captures(t!("abc")).unwrap();
    let _ = cap["bad name"];
}

#[test]
fn capture_index_lifetime() {
    // This is a test of whether the types on `caps["..."]` are general
    // enough. If not, this will fail to typecheck.
    fn inner(s: &str) -> usize {
        let re = regex!(r"(?P<number>\d+)");
        let caps = re.captures(t!(s)).unwrap();
        caps["number"].len()
    }
    assert_eq!(3, inner("123"));
}

#[test]
fn capture_misc() {
    let re = regex!(r"(.)(?P<a>a)?(.)(?P<b>.)");
    let cap = re.captures(t!("abc")).unwrap();

    assert_eq!(5, cap.len());

    assert_eq!(Some((0, 3)), cap.pos(0));
    assert_eq!(None, cap.pos(2));
    assert_eq!(Some((2, 3)), cap.pos(4));

    assert_eq!(Some(t!("abc")), cap.at(0));
    assert_eq!(None, cap.at(2));
    assert_eq!(Some(t!("c")), cap.at(4));

    assert_eq!(None, cap.name("a"));
    assert_eq!(Some(t!("c")), cap.name("b"));
}

#[test]
fn capture_iter() {
    let re = regex!(r"(.)(?P<a>.)(.)(?P<b>.)");
    let cap = re.captures(t!("abcd")).unwrap();
    assert_eq!(5, cap.len());

    let expected = vec![
        t!("abcd"), t!("a"), t!("b"), t!("c"), t!("d"),
    ].into_iter().map(Some).collect::<Vec<_>>();
    let got = cap.iter().collect::<Vec<_>>();
    assert_eq!(expected, got);
}

#[test]
fn capture_iter_missing() {
    let re = regex!(r"(.)(?P<a>a)?(.)(?P<b>.)");
    let cap = re.captures(t!("abc")).unwrap();
    assert_eq!(5, cap.len());

    let expected = vec![
        Some(t!("abc")), Some(t!("a")), None, Some(t!("b")), Some(t!("c")),
    ];
    let got = cap.iter().collect::<Vec<_>>();
    assert_eq!(expected, got);
}

#[test]
fn capture_iter_pos() {
    let re = regex!(r"(.)(?P<a>.)(.)(?P<b>.)");
    let cap = re.captures(t!("abcd")).unwrap();

    let expected = vec![
        (0, 4), (0, 1), (1, 2), (2, 3), (3, 4),
    ].into_iter().map(Some).collect::<Vec<_>>();
    let got = cap.iter_pos().collect::<Vec<_>>();
    assert_eq!(expected, got);
}

#[test]
fn capture_iter_pos_missing() {
    let re = regex!(r"(.)(?P<a>a)?(.)(?P<b>.)");
    let cap = re.captures(t!("abc")).unwrap();

    let expected = vec![
        Some((0, 3)), Some((0, 1)), None, Some((1, 2)), Some((2, 3)),
    ];
    let got = cap.iter_pos().collect::<Vec<_>>();
    assert_eq!(expected, got);
}

#[test]
fn capture_iter_named() {
    let re = regex!(r"(.)(?P<a>.)(.)(?P<b>.)");
    let cap = re.captures(t!("abcd")).unwrap();

    let expected1 = vec![
        ("a", Some(t!("b"))), ("b", Some(t!("d"))),
    ];
    let expected2 = vec![
        ("b", Some(t!("d"))), ("a", Some(t!("b"))),
    ];
    let got = cap.iter_named().collect::<Vec<_>>();
    assert!(got == expected1 || got == expected2);
}

#[test]
fn capture_iter_named_missing() {
    let re = regex!(r"(.)(?P<a>.)?(.)(?P<b>.)");
    let cap = re.captures(t!("abc")).unwrap();

    let expected1 = vec![
        ("a", None), ("b", Some(t!("c"))),
    ];
    let expected2 = vec![
        ("b", Some(t!("c"))), ("a", None),
    ];
    let got = cap.iter_named().collect::<Vec<_>>();
    assert!(got == expected1 || got == expected2);
}

expand!(expand1, r"(?P<foo>\w+)", "abc", "$foo", "abc");
expand!(expand2, r"(?P<foo>\w+)", "abc", "$0", "abc");
expand!(expand3, r"(?P<foo>\w+)", "abc", "$1", "abc");
expand!(expand4, r"(?P<foo>\w+)", "abc", "$$1", "$1");
expand!(expand5, r"(?P<foo>\w+)", "abc", "$$foo", "$foo");
expand!(expand6, r"(?P<a>\w+)\s+(?P<b>\d+)",
        "abc 123", "$b$a", "123abc");
expand!(expand7, r"(?P<a>\w+)\s+(?P<b>\d+)",
        "abc 123", "z$bz$az", "z");
expand!(expand8, r"(?P<a>\w+)\s+(?P<b>\d+)",
        "abc 123", ".$b.$a.", ".123.abc.");
expand!(expand9, r"(?P<a>\w+)\s+(?P<b>\d+)",
        "abc 123", " $b $a ", " 123 abc ");
expand!(expand10, r"(?P<a>\w+)\s+(?P<b>\d+)",
        "abc 123", "$bz$az", "");

split!(split1, r"\s+", "a b\nc\td\n\t e",
       &[t!("a"), t!("b"), t!("c"), t!("d"), t!("e")]);
split!(split2, r"\b", "a b c",
       &[t!(""), t!("a"), t!(" "), t!("b"), t!(" "), t!("c")]);