1 files changed, 280 insertions, 0 deletions

diff --git a/vendor/regex-automata/tests/dfa/suite.rs b/vendor/regex-automata/tests/dfa/suite.rs
new file mode 100644
index 000000000..426ae346d
--- /dev/null
+++ b/vendor/regex-automata/tests/dfa/suite.rs
@@ -0,0 +1,280 @@
+use regex_automata::{
+    dfa::{self, dense, regex::Regex, sparse, Automaton},
+    nfa::thompson,
+    MatchKind, SyntaxConfig,
+};
+use regex_syntax as syntax;
+
+use regex_test::{
+    bstr::{BString, ByteSlice},
+    CompiledRegex, Match, MatchKind as TestMatchKind, RegexTest, RegexTests,
+    SearchKind as TestSearchKind, TestResult, TestRunner,
+};
+
+use crate::{suite, Result};
+
+/// Runs the test suite with the default configuration.
+#[test]
+fn unminimized_default() -> Result<()> {
+    let builder = Regex::builder();
+    TestRunner::new()?
+        .test_iter(suite()?.iter(), dense_compiler(builder))
+        .assert();
+    Ok(())
+}
+
+/// Runs the test suite with byte classes disabled.
+#[test]
+fn unminimized_no_byte_class() -> Result<()> {
+    let mut builder = Regex::builder();
+    builder.dense(dense::Config::new().byte_classes(false));
+
+    TestRunner::new()?
+        .test_iter(suite()?.iter(), dense_compiler(builder))
+        .assert();
+    Ok(())
+}
+
+/// Runs the test suite with NFA shrinking disabled.
+#[test]
+fn unminimized_no_nfa_shrink() -> Result<()> {
+    let mut builder = Regex::builder();
+    builder.thompson(thompson::Config::new().shrink(false));
+
+    TestRunner::new()?
+        .test_iter(suite()?.iter(), dense_compiler(builder))
+        .assert();
+    Ok(())
+}
+
+/// Runs the test suite on a minimized DFA with an otherwise default
+/// configuration.
+#[test]
+fn minimized_default() -> Result<()> {
+    let mut builder = Regex::builder();
+    builder.dense(dense::Config::new().minimize(true));
+    TestRunner::new()?
+        // These regexes tend to be too big. Minimization takes... forever.
+        .blacklist("expensive")
+        .test_iter(suite()?.iter(), dense_compiler(builder))
+        .assert();
+    Ok(())
+}
+
+/// Runs the test suite on a minimized DFA with byte classes disabled.
+#[test]
+fn minimized_no_byte_class() -> Result<()> {
+    let mut builder = Regex::builder();
+    builder.dense(dense::Config::new().minimize(true).byte_classes(false));
+
+    TestRunner::new()?
+        // These regexes tend to be too big. Minimization takes... forever.
+        .blacklist("expensive")
+        .test_iter(suite()?.iter(), dense_compiler(builder))
+        .assert();
+    Ok(())
+}
+
+/// Runs the test suite on a sparse unminimized DFA.
+#[test]
+fn sparse_unminimized_default() -> Result<()> {
+    let builder = Regex::builder();
+    TestRunner::new()?
+        .test_iter(suite()?.iter(), sparse_compiler(builder))
+        .assert();
+    Ok(())
+}
+
+/// Another basic sanity test that checks we can serialize and then deserialize
+/// a regex, and that the resulting regex can be used for searching correctly.
+#[test]
+fn serialization_unminimized_default() -> Result<()> {
+    let builder = Regex::builder();
+    let my_compiler = |builder| {
+        compiler(builder, |builder, re| {
+            let builder = builder.clone();
+            let (fwd_bytes, _) = re.forward().to_bytes_native_endian();
+            let (rev_bytes, _) = re.reverse().to_bytes_native_endian();
+            Ok(CompiledRegex::compiled(move |test| -> Vec<TestResult> {
+                let fwd: dense::DFA<&[u32]> =
+                    dense::DFA::from_bytes(&fwd_bytes).unwrap().0;
+                let rev: dense::DFA<&[u32]> =
+                    dense::DFA::from_bytes(&rev_bytes).unwrap().0;
+                let re = builder.build_from_dfas(fwd, rev);
+
+                run_test(&re, test)
+            }))
+        })
+    };
+    TestRunner::new()?
+        .test_iter(suite()?.iter(), my_compiler(builder))
+        .assert();
+    Ok(())
+}
+
+/// A basic sanity test that checks we can serialize and then deserialize a
+/// regex using sparse DFAs, and that the resulting regex can be used for
+/// searching correctly.
+#[test]
+fn sparse_serialization_unminimized_default() -> Result<()> {
+    let builder = Regex::builder();
+    let my_compiler = |builder| {
+        compiler(builder, |builder, re| {
+            let builder = builder.clone();
+            let fwd_bytes = re.forward().to_sparse()?.to_bytes_native_endian();
+            let rev_bytes = re.reverse().to_sparse()?.to_bytes_native_endian();
+            Ok(CompiledRegex::compiled(move |test| -> Vec<TestResult> {
+                let fwd: sparse::DFA<&[u8]> =
+                    sparse::DFA::from_bytes(&fwd_bytes).unwrap().0;
+                let rev: sparse::DFA<&[u8]> =
+                    sparse::DFA::from_bytes(&rev_bytes).unwrap().0;
+                let re = builder.build_from_dfas(fwd, rev);
+                run_test(&re, test)
+            }))
+        })
+    };
+    TestRunner::new()?
+        .test_iter(suite()?.iter(), my_compiler(builder))
+        .assert();
+    Ok(())
+}
+
+fn dense_compiler(
+    builder: dfa::regex::Builder,
+) -> impl FnMut(&RegexTest, &[BString]) -> Result<CompiledRegex> {
+    compiler(builder, |_, re| {
+        Ok(CompiledRegex::compiled(move |test| -> Vec<TestResult> {
+            run_test(&re, test)
+        }))
+    })
+}
+
+fn sparse_compiler(
+    builder: dfa::regex::Builder,
+) -> impl FnMut(&RegexTest, &[BString]) -> Result<CompiledRegex> {
+    compiler(builder, |builder, re| {
+        let fwd = re.forward().to_sparse()?;
+        let rev = re.reverse().to_sparse()?;
+        let re = builder.build_from_dfas(fwd, rev);
+        Ok(CompiledRegex::compiled(move |test| -> Vec<TestResult> {
+            run_test(&re, test)
+        }))
+    })
+}
+
+fn compiler(
+    mut builder: dfa::regex::Builder,
+    mut create_matcher: impl FnMut(
+        &dfa::regex::Builder,
+        Regex,
+    ) -> Result<CompiledRegex>,
+) -> impl FnMut(&RegexTest, &[BString]) -> Result<CompiledRegex> {
+    move |test, regexes| {
+        let regexes = regexes
+            .iter()
+            .map(|r| r.to_str().map(|s| s.to_string()))
+            .collect::<std::result::Result<Vec<String>, _>>()?;
+
+        // Check if our regex contains things that aren't supported by DFAs.
+        // That is, Unicode word boundaries when searching non-ASCII text.
+        let mut thompson = thompson::Builder::new();
+        thompson.configure(config_thompson(test));
+        // TODO: Modify Hir to report facts like this, instead of needing to
+        // build an NFA to do it.
+        if let Ok(nfa) = thompson.build_many(&regexes) {
+            let non_ascii = test.input().iter().any(|&b| !b.is_ascii());
+            if nfa.has_word_boundary_unicode() && non_ascii {
+                return Ok(CompiledRegex::skip());
+            }
+        }
+        if !configure_regex_builder(test, &mut builder) {
+            return Ok(CompiledRegex::skip());
+        }
+        create_matcher(&builder, builder.build_many(&regexes)?)
+    }
+}
+
+fn run_test<A: Automaton>(re: &Regex<A>, test: &RegexTest) -> Vec<TestResult> {
+    let is_match = if re.is_match(test.input()) {
+        TestResult::matched()
+    } else {
+        TestResult::no_match()
+    };
+    let is_match = is_match.name("is_match");
+
+    let find_matches = match test.search_kind() {
+        TestSearchKind::Earliest => {
+            let it = re
+                .find_earliest_iter(test.input())
+                .take(test.match_limit().unwrap_or(std::usize::MAX))
+                .map(|m| Match {
+                    id: m.pattern().as_usize(),
+                    start: m.start(),
+                    end: m.end(),
+                });
+            TestResult::matches(it).name("find_earliest_iter")
+        }
+        TestSearchKind::Leftmost => {
+            let it = re
+                .find_leftmost_iter(test.input())
+                .take(test.match_limit().unwrap_or(std::usize::MAX))
+                .map(|m| Match {
+                    id: m.pattern().as_usize(),
+                    start: m.start(),
+                    end: m.end(),
+                });
+            TestResult::matches(it).name("find_leftmost_iter")
+        }
+        TestSearchKind::Overlapping => {
+            let it = re
+                .find_overlapping_iter(test.input())
+                .take(test.match_limit().unwrap_or(std::usize::MAX))
+                .map(|m| Match {
+                    id: m.pattern().as_usize(),
+                    start: m.start(),
+                    end: m.end(),
+                });
+            TestResult::matches(it).name("find_overlapping_iter")
+        }
+    };
+
+    vec![is_match, find_matches]
+}
+
+/// Configures the given regex builder with all relevant settings on the given
+/// regex test.
+///
+/// If the regex test has a setting that is unsupported, then this returns
+/// false (implying the test should be skipped).
+fn configure_regex_builder(
+    test: &RegexTest,
+    builder: &mut dfa::regex::Builder,
+) -> bool {
+    let match_kind = match test.match_kind() {
+        TestMatchKind::All => MatchKind::All,
+        TestMatchKind::LeftmostFirst => MatchKind::LeftmostFirst,
+        TestMatchKind::LeftmostLongest => return false,
+    };
+
+    let syntax_config = SyntaxConfig::new()
+        .case_insensitive(test.case_insensitive())
+        .unicode(test.unicode())
+        .utf8(test.utf8());
+    let dense_config = dense::Config::new()
+        .anchored(test.anchored())
+        .match_kind(match_kind)
+        .unicode_word_boundary(true);
+    let regex_config = Regex::config().utf8(test.utf8());
+
+    builder
+        .configure(regex_config)
+        .syntax(syntax_config)
+        .thompson(config_thompson(test))
+        .dense(dense_config);
+    true
+}
+
+/// Configuration of a Thompson NFA compiler from a regex test.
+fn config_thompson(test: &RegexTest) -> thompson::Config {
+    thompson::Config::new().utf8(test.utf8())
+}