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use std::fmt;
use crate::reflection;
use crate::utils;
use crate::Predicate;
pub type RegexError = regex::Error;
#[derive(Debug, Clone)]
pub struct RegexPredicate {
re: regex::Regex,
}
impl RegexPredicate {
pub fn count(self, count: usize) -> RegexMatchesPredicate {
RegexMatchesPredicate { re: self.re, count }
}
}
impl Predicate<str> for RegexPredicate {
fn eval(&self, variable: &str) -> bool {
self.re.is_match(variable)
}
fn find_case<'a>(&'a self, expected: bool, variable: &str) -> Option<reflection::Case<'a>> {
utils::default_find_case(self, expected, variable)
.map(|case| case.add_product(reflection::Product::new("var", variable.to_owned())))
}
}
impl reflection::PredicateReflection for RegexPredicate {}
impl fmt::Display for RegexPredicate {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let palette = crate::Palette::current();
write!(
f,
"{}.{}({})",
palette.var.paint("var"),
palette.description.paint("is_match"),
palette.expected.paint(&self.re),
)
}
}
#[derive(Debug, Clone)]
pub struct RegexMatchesPredicate {
re: regex::Regex,
count: usize,
}
impl Predicate<str> for RegexMatchesPredicate {
fn eval(&self, variable: &str) -> bool {
self.re.find_iter(variable).count() == self.count
}
fn find_case<'a>(&'a self, expected: bool, variable: &str) -> Option<reflection::Case<'a>> {
let actual_count = self.re.find_iter(variable).count();
let result = self.count == actual_count;
if result == expected {
Some(
reflection::Case::new(Some(self), result)
.add_product(reflection::Product::new("var", variable.to_owned()))
.add_product(reflection::Product::new("actual count", actual_count)),
)
} else {
None
}
}
}
impl reflection::PredicateReflection for RegexMatchesPredicate {
fn parameters<'a>(&'a self) -> Box<dyn Iterator<Item = reflection::Parameter<'a>> + 'a> {
let params = vec![reflection::Parameter::new("count", &self.count)];
Box::new(params.into_iter())
}
}
impl fmt::Display for RegexMatchesPredicate {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let palette = crate::Palette::current();
write!(
f,
"{}.{}({})",
palette.var.paint("var"),
palette.description.paint("is_match"),
palette.expected.paint(&self.re),
)
}
}
pub fn is_match<S>(pattern: S) -> Result<RegexPredicate, RegexError>
where
S: AsRef<str>,
{
regex::Regex::new(pattern.as_ref()).map(|re| RegexPredicate { re })
}