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use std::str::FromStr;
pub struct RangeFilter {
from: usize,
to: usize,
}
impl RangeFilter {
pub fn includes(&self, index: usize) -> bool {
index >= self.from && index <= self.to
}
}
impl FromStr for RangeFilter {
type Err = ();
fn from_str(s: &str) -> Result<RangeFilter, Self::Err> {
let bounds: Vec<usize> = s
.splitn(2, ':')
.map(|x| x.parse::<usize>())
.flatten()
.collect();
if bounds.len() == 2 {
return Ok(RangeFilter {
from: bounds[0],
to: bounds[1],
});
}
if let Ok(index) = s.parse::<usize>() {
return Ok(RangeFilter {
from: index,
to: index,
});
}
Err(())
}
}
#[cfg(test)]
mod tests {
use crate::selectors::test::test_filter_event_index;
use crate::testdata;
#[test]
fn test_index_single() {
let filtered = test_filter_event_index(&testdata::TEST_EVENT_MULTIDAY, 1, &["1"]);
assert!(filtered)
}
#[test]
fn test_index_single_negative() {
let filtered = test_filter_event_index(&testdata::TEST_EVENT_MULTIDAY, 5, &["1"]);
assert_eq!(false, filtered)
}
#[test]
fn test_index_range_lower() {
let filtered = test_filter_event_index(&testdata::TEST_EVENT_MULTIDAY, 1, &["1:3"]);
assert!(filtered)
}
#[test]
fn test_index_range_middle() {
let filtered = test_filter_event_index(&testdata::TEST_EVENT_MULTIDAY, 2, &["1:3"]);
assert!(filtered)
}
#[test]
fn test_index_range_upper() {
let filtered = test_filter_event_index(&testdata::TEST_EVENT_MULTIDAY, 3, &["1:3"]);
assert!(filtered)
}
#[test]
fn test_index_range_negative() {
let filtered = test_filter_event_index(&testdata::TEST_EVENT_MULTIDAY, 4, &["1:3"]);
assert_eq!(false, filtered)
}
}
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