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use regex_automata::{
dfa::{dense, Automaton},
MatchError,
};
// A regression test for checking that minimization correctly translates
// whether a state is a match state or not. Previously, it was possible for
// minimization to mark a non-matching state as matching.
#[test]
fn minimize_sets_correct_match_states() {
let pattern =
// This is a subset of the grapheme matching regex. I couldn't seem
// to get a repro any smaller than this unfortunately.
r"(?x)
(?:
\p{gcb=Prepend}*
(?:
(?:
(?:
\p{gcb=L}*
(?:\p{gcb=V}+|\p{gcb=LV}\p{gcb=V}*|\p{gcb=LVT})
\p{gcb=T}*
)
|
\p{gcb=L}+
|
\p{gcb=T}+
)
|
\p{Extended_Pictographic}
(?:\p{gcb=Extend}*\p{gcb=ZWJ}\p{Extended_Pictographic})*
|
[^\p{gcb=Control}\p{gcb=CR}\p{gcb=LF}]
)
[\p{gcb=Extend}\p{gcb=ZWJ}\p{gcb=SpacingMark}]*
)
";
let dfa = dense::Builder::new()
.configure(dense::Config::new().anchored(true).minimize(true))
.build(pattern)
.unwrap();
assert_eq!(Ok(None), dfa.find_leftmost_fwd(b"\xE2"));
}
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