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use rand::distributions::Standard;
use rand::{Rng, SeedableRng};
use rand_xorshift::XorShiftRng;
use rayon::prelude::*;
fn seeded_rng() -> XorShiftRng {
let mut seed = <XorShiftRng as SeedableRng>::Seed::default();
(0..).zip(seed.as_mut()).for_each(|(i, x)| *x = i);
XorShiftRng::from_seed(seed)
}
#[test]
pub fn execute_strings() {
let rng = seeded_rng();
let s: String = rng.sample_iter::<char, _>(&Standard).take(1024).collect();
let par_chars: String = s.par_chars().collect();
assert_eq!(s, par_chars);
let par_even: String = s.par_chars().filter(|&c| (c as u32) & 1 == 0).collect();
let ser_even: String = s.chars().filter(|&c| (c as u32) & 1 == 0).collect();
assert_eq!(par_even, ser_even);
// test `FromParallelIterator<&char> for String`
let vchars: Vec<char> = s.par_chars().collect();
let par_chars: String = vchars.par_iter().collect();
assert_eq!(s, par_chars);
let par_bytes: Vec<u8> = s.par_bytes().collect();
assert_eq!(s.as_bytes(), &*par_bytes);
let par_utf16: Vec<u16> = s.par_encode_utf16().collect();
let ser_utf16: Vec<u16> = s.encode_utf16().collect();
assert_eq!(par_utf16, ser_utf16);
let par_charind: Vec<_> = s.par_char_indices().collect();
let ser_charind: Vec<_> = s.char_indices().collect();
assert_eq!(par_charind, ser_charind);
}
#[test]
pub fn execute_strings_split() {
// char testcases from examples in `str::split` etc.,
// plus a large self-test for good measure.
let tests = vec![
("Mary had a little lamb", ' '),
("", 'X'),
("lionXXtigerXleopard", 'X'),
("||||a||b|c", '|'),
("(///)", '/'),
("010", '0'),
(" a b c", ' '),
("A.B.", '.'),
("A..B..", '.'),
("foo\r\nbar\n\nbaz\n", '\n'),
("foo\nbar\n\r\nbaz", '\n'),
("A few words", ' '),
(" Mary had\ta\u{2009}little \n\t lamb", ' '),
(include_str!("str.rs"), ' '),
];
for &(string, separator) in &tests {
let serial: Vec<_> = string.split(separator).collect();
let parallel: Vec<_> = string.par_split(separator).collect();
assert_eq!(serial, parallel);
let pattern: &[char] = &['\u{0}', separator, '\u{1F980}'];
let serial: Vec<_> = string.split(pattern).collect();
let parallel: Vec<_> = string.par_split(pattern).collect();
assert_eq!(serial, parallel);
let serial_fn: Vec<_> = string.split(|c| c == separator).collect();
let parallel_fn: Vec<_> = string.par_split(|c| c == separator).collect();
assert_eq!(serial_fn, parallel_fn);
}
for &(string, separator) in &tests {
let serial: Vec<_> = string.split_terminator(separator).collect();
let parallel: Vec<_> = string.par_split_terminator(separator).collect();
assert_eq!(serial, parallel);
let pattern: &[char] = &['\u{0}', separator, '\u{1F980}'];
let serial: Vec<_> = string.split_terminator(pattern).collect();
let parallel: Vec<_> = string.par_split_terminator(pattern).collect();
assert_eq!(serial, parallel);
let serial: Vec<_> = string.split_terminator(|c| c == separator).collect();
let parallel: Vec<_> = string.par_split_terminator(|c| c == separator).collect();
assert_eq!(serial, parallel);
}
for &(string, _) in &tests {
let serial: Vec<_> = string.lines().collect();
let parallel: Vec<_> = string.par_lines().collect();
assert_eq!(serial, parallel);
}
for &(string, _) in &tests {
let serial: Vec<_> = string.split_whitespace().collect();
let parallel: Vec<_> = string.par_split_whitespace().collect();
assert_eq!(serial, parallel);
}
// try matching separators too!
for &(string, separator) in &tests {
let serial: Vec<_> = string.matches(separator).collect();
let parallel: Vec<_> = string.par_matches(separator).collect();
assert_eq!(serial, parallel);
let pattern: &[char] = &['\u{0}', separator, '\u{1F980}'];
let serial: Vec<_> = string.matches(pattern).collect();
let parallel: Vec<_> = string.par_matches(pattern).collect();
assert_eq!(serial, parallel);
let serial_fn: Vec<_> = string.matches(|c| c == separator).collect();
let parallel_fn: Vec<_> = string.par_matches(|c| c == separator).collect();
assert_eq!(serial_fn, parallel_fn);
}
for &(string, separator) in &tests {
let serial: Vec<_> = string.match_indices(separator).collect();
let parallel: Vec<_> = string.par_match_indices(separator).collect();
assert_eq!(serial, parallel);
let pattern: &[char] = &['\u{0}', separator, '\u{1F980}'];
let serial: Vec<_> = string.match_indices(pattern).collect();
let parallel: Vec<_> = string.par_match_indices(pattern).collect();
assert_eq!(serial, parallel);
let serial_fn: Vec<_> = string.match_indices(|c| c == separator).collect();
let parallel_fn: Vec<_> = string.par_match_indices(|c| c == separator).collect();
assert_eq!(serial_fn, parallel_fn);
}
}
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