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use {
anyhow::Result,
regex::bytes::{RegexSet, RegexSetBuilder},
regex_test::{CompiledRegex, RegexTest, TestResult, TestRunner},
};
/// Tests the default configuration of the hybrid NFA/DFA.
#[test]
fn default() -> Result<()> {
let mut runner = TestRunner::new()?;
runner
.expand(&["is_match", "which"], |test| test.compiles())
.blacklist_iter(super::BLACKLIST)
.test_iter(crate::suite()?.iter(), compiler)
.assert();
Ok(())
}
fn run_test(re: &RegexSet, test: &RegexTest) -> TestResult {
match test.additional_name() {
"is_match" => TestResult::matched(re.is_match(test.haystack())),
"which" => TestResult::which(re.matches(test.haystack()).iter()),
name => TestResult::fail(&format!("unrecognized test name: {}", name)),
}
}
/// Converts the given regex test to a closure that searches with a
/// `bytes::Regex`. If the test configuration is unsupported, then a
/// `CompiledRegex` that skips the test is returned.
fn compiler(
test: &RegexTest,
_patterns: &[String],
) -> anyhow::Result<CompiledRegex> {
let skip = Ok(CompiledRegex::skip());
// The top-level RegexSet API only supports "overlapping" semantics.
if !matches!(test.search_kind(), regex_test::SearchKind::Overlapping) {
return skip;
}
// The top-level RegexSet API only supports "all" semantics.
if !matches!(test.match_kind(), regex_test::MatchKind::All) {
return skip;
}
// The top-level RegexSet API always runs unanchored searches.
if test.anchored() {
return skip;
}
// We don't support tests with explicit search bounds.
let bounds = test.bounds();
if !(bounds.start == 0 && bounds.end == test.haystack().len()) {
return skip;
}
// The bytes::Regex API specifically does not support enabling UTF-8 mode.
// It could I suppose, but currently it does not. That is, it permits
// matches to have offsets that split codepoints.
if test.utf8() {
return skip;
}
// If the test requires Unicode but the Unicode feature isn't enabled,
// skip it. This is a little aggressive, but the test suite doesn't
// have any easy way of communicating which Unicode features are needed.
if test.unicode() && !cfg!(feature = "unicode") {
return skip;
}
let re = RegexSetBuilder::new(test.regexes())
.case_insensitive(test.case_insensitive())
.unicode(test.unicode())
.line_terminator(test.line_terminator())
.build()?;
Ok(CompiledRegex::compiled(move |test| run_test(&re, test)))
}