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use {
anyhow::Result,
regex_automata::{
nfa::thompson::{
self,
pikevm::{self, PikeVM},
},
util::{prefilter::Prefilter, syntax},
PatternSet,
},
regex_test::{
CompiledRegex, Match, RegexTest, SearchKind, Span, TestResult,
TestRunner,
},
};
use crate::{create_input, suite, testify_captures, untestify_kind};
/// Tests the default configuration of the hybrid NFA/DFA.
#[test]
fn default() -> Result<()> {
let builder = PikeVM::builder();
let mut runner = TestRunner::new()?;
runner.expand(&["is_match", "find", "captures"], |test| test.compiles());
runner.test_iter(suite()?.iter(), compiler(builder)).assert();
Ok(())
}
/// Tests the PikeVM with prefilters enabled.
#[test]
fn prefilter() -> Result<()> {
let my_compiler = |test: &RegexTest, regexes: &[String]| {
// Parse regexes as HIRs so we can get literals to build a prefilter.
let mut hirs = vec![];
for pattern in regexes.iter() {
hirs.push(syntax::parse_with(pattern, &config_syntax(test))?);
}
let kind = match untestify_kind(test.match_kind()) {
None => return Ok(CompiledRegex::skip()),
Some(kind) => kind,
};
let pre = Prefilter::from_hirs_prefix(kind, &hirs);
let mut builder = PikeVM::builder();
builder.configure(PikeVM::config().prefilter(pre));
compiler(builder)(test, regexes)
};
let mut runner = TestRunner::new()?;
runner.expand(&["is_match", "find", "captures"], |test| test.compiles());
runner.test_iter(suite()?.iter(), my_compiler).assert();
Ok(())
}
fn compiler(
mut builder: pikevm::Builder,
) -> impl FnMut(&RegexTest, &[String]) -> Result<CompiledRegex> {
move |test, regexes| {
if !configure_pikevm_builder(test, &mut builder) {
return Ok(CompiledRegex::skip());
}
let re = builder.build_many(®exes)?;
let mut cache = re.create_cache();
Ok(CompiledRegex::compiled(move |test| -> TestResult {
run_test(&re, &mut cache, test)
}))
}
}
fn run_test(
re: &PikeVM,
cache: &mut pikevm::Cache,
test: &RegexTest,
) -> TestResult {
let input = create_input(test);
match test.additional_name() {
"is_match" => TestResult::matched(re.is_match(cache, input)),
"find" => match test.search_kind() {
SearchKind::Earliest => {
let it = re
.find_iter(cache, input.earliest(true))
.take(test.match_limit().unwrap_or(std::usize::MAX))
.map(|m| Match {
id: m.pattern().as_usize(),
span: Span { start: m.start(), end: m.end() },
});
TestResult::matches(it)
}
SearchKind::Leftmost => {
let it = re
.find_iter(cache, input)
.take(test.match_limit().unwrap_or(std::usize::MAX))
.map(|m| Match {
id: m.pattern().as_usize(),
span: Span { start: m.start(), end: m.end() },
});
TestResult::matches(it)
}
SearchKind::Overlapping => {
let mut patset = PatternSet::new(re.get_nfa().pattern_len());
re.which_overlapping_matches(cache, &input, &mut patset);
TestResult::which(patset.iter().map(|p| p.as_usize()))
}
},
"captures" => match test.search_kind() {
SearchKind::Earliest => {
let it = re
.captures_iter(cache, input.earliest(true))
.take(test.match_limit().unwrap_or(std::usize::MAX))
.map(|caps| testify_captures(&caps));
TestResult::captures(it)
}
SearchKind::Leftmost => {
let it = re
.captures_iter(cache, input)
.take(test.match_limit().unwrap_or(std::usize::MAX))
.map(|caps| testify_captures(&caps));
TestResult::captures(it)
}
SearchKind::Overlapping => {
// There is no overlapping PikeVM API that supports captures.
TestResult::skip()
}
},
name => TestResult::fail(&format!("unrecognized test name: {}", name)),
}
}
/// 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_pikevm_builder(
test: &RegexTest,
builder: &mut pikevm::Builder,
) -> bool {
let match_kind = match untestify_kind(test.match_kind()) {
None => return false,
Some(k) => k,
};
let pikevm_config = PikeVM::config().match_kind(match_kind);
builder
.configure(pikevm_config)
.syntax(config_syntax(test))
.thompson(config_thompson(test));
true
}
/// Configuration of a Thompson NFA compiler from a regex test.
fn config_thompson(test: &RegexTest) -> thompson::Config {
let mut lookm = regex_automata::util::look::LookMatcher::new();
lookm.set_line_terminator(test.line_terminator());
thompson::Config::new().utf8(test.utf8()).look_matcher(lookm)
}
/// Configuration of the regex parser from a regex test.
fn config_syntax(test: &RegexTest) -> syntax::Config {
syntax::Config::new()
.case_insensitive(test.case_insensitive())
.unicode(test.unicode())
.utf8(test.utf8())
.line_terminator(test.line_terminator())
}
|
