1 files changed, 234 insertions, 0 deletions
diff --git a/third_party/rust/regex/tests/api.rs b/third_party/rust/regex/tests/api.rs
new file mode 100644
index 0000000000..c7250a8a3a
--- /dev/null
+++ b/third_party/rust/regex/tests/api.rs
@@ -0,0 +1,234 @@
+#[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"[0-9]*");
+    assert_eq!(vec![(0, 0), (1, 2), (3, 4)], findall!(re, "a1b2"));
+}
+
+#[test]
+fn many_zero_length_match() {
+    let re = regex!(r"[0-9]*");
+    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"[0-9]?");
+    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.get(0).unwrap())
+        .map(|m| (m.start(), m.end()))
+        .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>.+)$");
+    let cap = re.captures(t!("abc")).unwrap();
+    let _ = cap["bad name"];
+}
+
+#[test]
+fn capture_index_lifetime() {
+    // This is a test of whether the types on `caps["..."]` are general
+    // enough. If not, this will fail to typecheck.
+    fn inner(s: &str) -> usize {
+        let re = regex!(r"(?P<number>[0-9]+)");
+        let caps = re.captures(t!(s)).unwrap();
+        caps["number"].len()
+    }
+    assert_eq!(3, inner("123"));
+}
+
+#[test]
+fn capture_misc() {
+    let re = regex!(r"(.)(?P<a>a)?(.)(?P<b>.)");
+    let cap = re.captures(t!("abc")).unwrap();
+
+    assert_eq!(5, cap.len());
+
+    assert_eq!((0, 3), {
+        let m = cap.get(0).unwrap();
+        (m.start(), m.end())
+    });
+    assert_eq!(None, cap.get(2));
+    assert_eq!((2, 3), {
+        let m = cap.get(4).unwrap();
+        (m.start(), m.end())
+    });
+
+    assert_eq!(t!("abc"), match_text!(cap.get(0).unwrap()));
+    assert_eq!(None, cap.get(2));
+    assert_eq!(t!("c"), match_text!(cap.get(4).unwrap()));
+
+    assert_eq!(None, cap.name("a"));
+    assert_eq!(t!("c"), match_text!(cap.name("b").unwrap()));
+}
+
+#[test]
+fn sub_capture_matches() {
+    let re = regex!(r"([a-z])(([a-z])|([0-9]))");
+    let cap = re.captures(t!("a5")).unwrap();
+    let subs: Vec<_> = cap.iter().collect();
+
+    assert_eq!(5, subs.len());
+    assert!(subs[0].is_some());
+    assert!(subs[1].is_some());
+    assert!(subs[2].is_some());
+    assert!(subs[3].is_none());
+    assert!(subs[4].is_some());
+
+    assert_eq!(t!("a5"), match_text!(subs[0].unwrap()));
+    assert_eq!(t!("a"), match_text!(subs[1].unwrap()));
+    assert_eq!(t!("5"), match_text!(subs[2].unwrap()));
+    assert_eq!(t!("5"), match_text!(subs[4].unwrap()));
+}
+
+expand!(expand1, r"(?-u)(?P<foo>\w+)", "abc", "$foo", "abc");
+expand!(expand2, r"(?-u)(?P<foo>\w+)", "abc", "$0", "abc");
+expand!(expand3, r"(?-u)(?P<foo>\w+)", "abc", "$1", "abc");
+expand!(expand4, r"(?-u)(?P<foo>\w+)", "abc", "$$1", "$1");
+expand!(expand5, r"(?-u)(?P<foo>\w+)", "abc", "$$foo", "$foo");
+expand!(expand6, r"(?-u)(?P<a>\w+)\s+(?P<b>\d+)", "abc 123", "$b$a", "123abc");
+expand!(expand7, r"(?-u)(?P<a>\w+)\s+(?P<b>\d+)", "abc 123", "z$bz$az", "z");
+expand!(
+    expand8,
+    r"(?-u)(?P<a>\w+)\s+(?P<b>\d+)",
+    "abc 123",
+    ".$b.$a.",
+    ".123.abc."
+);
+expand!(
+    expand9,
+    r"(?-u)(?P<a>\w+)\s+(?P<b>\d+)",
+    "abc 123",
+    " $b $a ",
+    " 123 abc "
+);
+expand!(expand10, r"(?-u)(?P<a>\w+)\s+(?P<b>\d+)", "abc 123", "$bz$az", "");
+
+expand!(expand_name1, r"%(?P<Z>[a-z]+)", "%abc", "$Z%", "abc%");
+expand!(expand_name2, r"\[(?P<Z>[a-z]+)", "[abc", "$Z[", "abc[");
+expand!(expand_name3, r"\{(?P<Z>[a-z]+)", "{abc", "$Z{", "abc{");
+expand!(expand_name4, r"\}(?P<Z>[a-z]+)", "}abc", "$Z}", "abc}");
+expand!(expand_name5, r"%([a-z]+)", "%abc", "$1a%", "%");
+expand!(expand_name6, r"%([a-z]+)", "%abc", "${1}a%", "abca%");
+expand!(expand_name7, r"\[(?P<Z[>[a-z]+)", "[abc", "${Z[}[", "abc[");
+expand!(expand_name8, r"\[(?P<Z[>[a-z]+)", "[abc", "${foo}[", "[");
+expand!(expand_name9, r"\[(?P<Z[>[a-z]+)", "[abc", "${1a}[", "[");
+expand!(expand_name10, r"\[(?P<Z[>[a-z]+)", "[abc", "${#}[", "[");
+expand!(expand_name11, r"\[(?P<Z[>[a-z]+)", "[abc", "${$$}[", "[");
+
+split!(
+    split1,
+    r"(?-u)\s+",
+    "a b\nc\td\n\t e",
+    &[t!("a"), t!("b"), t!("c"), t!("d"), t!("e")]
+);
+split!(
+    split2,
+    r"(?-u)\b",
+    "a b c",
+    &[t!(""), t!("a"), t!(" "), t!("b"), t!(" "), t!("c"), t!("")]
+);
+split!(split3, r"a$", "a", &[t!(""), t!("")]);
+split!(split_none, r"-", r"a", &[t!("a")]);
+split!(split_trailing_blank, r"-", r"a-", &[t!("a"), t!("")]);
+split!(split_trailing_blanks, r"-", r"a--", &[t!("a"), t!(""), t!("")]);
+split!(split_empty, r"-", r"", &[t!("")]);
+
+splitn!(splitn_below_limit, r"-", r"a", 2, &[t!("a")]);
+splitn!(splitn_at_limit, r"-", r"a-b", 2, &[t!("a"), t!("b")]);
+splitn!(splitn_above_limit, r"-", r"a-b-c", 2, &[t!("a"), t!("b-c")]);
+splitn!(splitn_zero_limit, r"-", r"a-b", 0, empty_vec!());
+splitn!(splitn_trailing_blank, r"-", r"a-", 2, &[t!("a"), t!("")]);
+splitn!(splitn_trailing_separator, r"-", r"a--", 2, &[t!("a"), t!("-")]);
+splitn!(splitn_empty, r"-", r"", 1, &[t!("")]);