1 files changed, 114 insertions, 0 deletions
diff --git a/third_party/rust/regex-automata/tests/lib.rs b/third_party/rust/regex-automata/tests/lib.rs
new file mode 100644
index 0000000000..1465e51eb7
--- /dev/null
+++ b/third_party/rust/regex-automata/tests/lib.rs
@@ -0,0 +1,114 @@
+// We have a similar config in the regex-automata crate root. Basically, it is
+// just too annoying to deal with dead code when a subset of features is
+// enabled.
+#![cfg_attr(
+    not(all(
+        feature = "std",
+        feature = "nfa",
+        feature = "dfa",
+        feature = "hybrid",
+        feature = "perf-literal-substring",
+        feature = "perf-literal-multisubstring",
+    )),
+    allow(dead_code, unused_imports, unused_variables)
+)]
+// Similar deal with Miri. Just let dead code warnings be.
+#![cfg_attr(miri, allow(dead_code, unused_imports, unused_variables))]
+
+#[cfg(any(feature = "dfa-search", feature = "dfa-onepass"))]
+mod dfa;
+#[cfg(feature = "dfa-search")]
+mod fuzz;
+#[cfg(feature = "dfa-search")]
+mod gen;
+#[cfg(feature = "hybrid")]
+mod hybrid;
+#[cfg(feature = "meta")]
+mod meta;
+#[cfg(any(feature = "nfa-backtrack", feature = "nfa-pikevm"))]
+mod nfa;
+
+fn suite() -> anyhow::Result<regex_test::RegexTests> {
+    let _ = env_logger::try_init();
+
+    let mut tests = regex_test::RegexTests::new();
+    macro_rules! load {
+        ($name:expr) => {{
+            const DATA: &[u8] =
+                include_bytes!(concat!("../../testdata/", $name, ".toml"));
+            tests.load_slice($name, DATA)?;
+        }};
+    }
+
+    load!("anchored");
+    load!("bytes");
+    load!("crazy");
+    load!("crlf");
+    load!("earliest");
+    load!("empty");
+    load!("expensive");
+    load!("flags");
+    load!("iter");
+    load!("leftmost-all");
+    load!("line-terminator");
+    load!("misc");
+    load!("multiline");
+    load!("no-unicode");
+    load!("overlapping");
+    load!("regression");
+    load!("set");
+    load!("substring");
+    load!("unicode");
+    load!("utf8");
+    load!("word-boundary");
+    load!("fowler/basic");
+    load!("fowler/nullsubexpr");
+    load!("fowler/repetition");
+
+    Ok(tests)
+}
+
+/// Configure a regex_automata::Input with the given test configuration.
+fn create_input<'h>(
+    test: &'h regex_test::RegexTest,
+) -> regex_automata::Input<'h> {
+    use regex_automata::Anchored;
+
+    let bounds = test.bounds();
+    let anchored = if test.anchored() { Anchored::Yes } else { Anchored::No };
+    regex_automata::Input::new(test.haystack())
+        .range(bounds.start..bounds.end)
+        .anchored(anchored)
+}
+
+/// Convert capture matches into the test suite's capture values.
+///
+/// The given captures must represent a valid match, where the first capturing
+/// group has a non-None span. Otherwise this panics.
+fn testify_captures(
+    caps: &regex_automata::util::captures::Captures,
+) -> regex_test::Captures {
+    assert!(caps.is_match(), "expected captures to represent a match");
+    let spans = caps.iter().map(|group| {
+        group.map(|m| regex_test::Span { start: m.start, end: m.end })
+    });
+    // These unwraps are OK because we assume our 'caps' represents a match,
+    // and a match always gives a non-zero number of groups with the first
+    // group being non-None.
+    regex_test::Captures::new(caps.pattern().unwrap().as_usize(), spans)
+        .unwrap()
+}
+
+/// Convert a test harness match kind to a regex-automata match kind. If
+/// regex-automata doesn't support the harness kind, then `None` is returned.
+fn untestify_kind(
+    kind: regex_test::MatchKind,
+) -> Option<regex_automata::MatchKind> {
+    match kind {
+        regex_test::MatchKind::All => Some(regex_automata::MatchKind::All),
+        regex_test::MatchKind::LeftmostFirst => {
+            Some(regex_automata::MatchKind::LeftmostFirst)
+        }
+        regex_test::MatchKind::LeftmostLongest => None,
+    }
+}