1 extern crate rand;
2 extern crate rayon;
3
4 use rand::{Rng, SeedableRng, XorShiftRng};
5 use rand::distributions::Standard;
6 use rayon::prelude::*;
7
seeded_rng() -> XorShiftRng8 fn seeded_rng() -> XorShiftRng {
9 let mut seed = <XorShiftRng as SeedableRng>::Seed::default();
10 (0..).zip(seed.as_mut()).for_each(|(i, x)| *x = i);
11 XorShiftRng::from_seed(seed)
12 }
13
14 #[test]
execute_strings()15 pub fn execute_strings() {
16 let mut rng = seeded_rng();
17 let s: String = rng.sample_iter::<char, _>(&Standard).take(1024).collect();
18
19 let par_chars: String = s.par_chars().collect();
20 assert_eq!(s, par_chars);
21
22 let par_even: String = s.par_chars().filter(|&c| (c as u32) & 1 == 0).collect();
23 let ser_even: String = s.chars().filter(|&c| (c as u32) & 1 == 0).collect();
24 assert_eq!(par_even, ser_even);
25
26 // test `FromParallelIterator<&char> for String`
27 let vchars: Vec<char> = s.par_chars().collect();
28 let par_chars: String = vchars.par_iter().collect();
29 assert_eq!(s, par_chars);
30
31 let par_bytes: Vec<u8> = s.par_bytes().collect();
32 assert_eq!(s.as_bytes(), &*par_bytes);
33
34 let par_utf16: Vec<u16> = s.par_encode_utf16().collect();
35 let ser_utf16: Vec<u16> = s.encode_utf16().collect();
36 assert_eq!(par_utf16, ser_utf16);
37
38 let par_charind: Vec<_> = s.par_char_indices().collect();
39 let ser_charind: Vec<_> = s.char_indices().collect();
40 assert_eq!(par_charind, ser_charind);
41 }
42
43 #[test]
execute_strings_split()44 pub fn execute_strings_split() {
45 // char testcases from examples in `str::split` etc.,
46 // plus a large self-test for good measure.
47 let tests = vec![("Mary had a little lamb", ' '),
48 ("", 'X'),
49 ("lionXXtigerXleopard", 'X'),
50 ("||||a||b|c", '|'),
51 ("(///)", '/'),
52 ("010", '0'),
53 (" a b c", ' '),
54 ("A.B.", '.'),
55 ("A..B..", '.'),
56 ("foo\r\nbar\n\nbaz\n", '\n'),
57 ("foo\nbar\n\r\nbaz", '\n'),
58 ("A few words", ' '),
59 (" Mary had\ta\u{2009}little \n\t lamb", ' '),
60 (include_str!("str.rs"), ' ')];
61
62 for &(string, separator) in &tests {
63 let serial: Vec<_> = string.split(separator).collect();
64 let parallel: Vec<_> = string.par_split(separator).collect();
65 assert_eq!(serial, parallel);
66
67 let serial_fn: Vec<_> = string.split(|c| c == separator).collect();
68 let parallel_fn: Vec<_> = string.par_split(|c| c == separator).collect();
69 assert_eq!(serial_fn, parallel_fn);
70 }
71
72 for &(string, separator) in &tests {
73 let serial: Vec<_> = string.split_terminator(separator).collect();
74 let parallel: Vec<_> = string.par_split_terminator(separator).collect();
75 assert_eq!(serial, parallel);
76 }
77
78 for &(string, separator) in &tests {
79 let serial: Vec<_> = string.split_terminator(|c| c == separator).collect();
80 let parallel: Vec<_> = string.par_split_terminator(|c| c == separator).collect();
81 assert_eq!(serial, parallel);
82 }
83
84 for &(string, _) in &tests {
85 let serial: Vec<_> = string.lines().collect();
86 let parallel: Vec<_> = string.par_lines().collect();
87 assert_eq!(serial, parallel);
88 }
89
90 for &(string, _) in &tests {
91 let serial: Vec<_> = string.split_whitespace().collect();
92 let parallel: Vec<_> = string.par_split_whitespace().collect();
93 assert_eq!(serial, parallel);
94 }
95
96 // try matching separators too!
97 for &(string, separator) in &tests {
98 let serial: Vec<_> = string.matches(separator).collect();
99 let parallel: Vec<_> = string.par_matches(separator).collect();
100 assert_eq!(serial, parallel);
101
102 let serial_fn: Vec<_> = string.matches(|c| c == separator).collect();
103 let parallel_fn: Vec<_> = string.par_matches(|c| c == separator).collect();
104 assert_eq!(serial_fn, parallel_fn);
105 }
106
107 for &(string, separator) in &tests {
108 let serial: Vec<_> = string.match_indices(separator).collect();
109 let parallel: Vec<_> = string.par_match_indices(separator).collect();
110 assert_eq!(serial, parallel);
111
112 let serial_fn: Vec<_> = string.match_indices(|c| c == separator).collect();
113 let parallel_fn: Vec<_> = string.par_match_indices(|c| c == separator).collect();
114 assert_eq!(serial_fn, parallel_fn);
115 }
116 }
117