/
ops.rs
94 lines (78 loc) · 2.43 KB
/
ops.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use core::ops::{Range, RangeFull, RangeFrom, RangeTo, RangeInclusive};
// Test the Range structs without the syntactic sugar.
#[test]
fn test_range() {
let r = Range { start: 2, end: 10 };
let mut count = 0;
for (i, ri) in r.enumerate() {
assert!(ri == i + 2);
assert!(ri >= 2 && ri < 10);
count += 1;
}
assert!(count == 8);
}
#[test]
fn test_range_from() {
let r = RangeFrom { start: 2 };
let mut count = 0;
for (i, ri) in r.take(10).enumerate() {
assert!(ri == i + 2);
assert!(ri >= 2 && ri < 12);
count += 1;
}
assert!(count == 10);
}
#[test]
fn test_range_to() {
// Not much to test.
let _ = RangeTo { end: 42 };
}
#[test]
fn test_full_range() {
// Not much to test.
let _ = RangeFull;
}
#[test]
fn test_range_inclusive() {
let mut r = RangeInclusive::new(1i8, 2);
assert_eq!(r.next(), Some(1));
assert_eq!(r.next(), Some(2));
assert_eq!(r.next(), None);
r = RangeInclusive::new(127i8, 127);
assert_eq!(r.next(), Some(127));
assert_eq!(r.next(), None);
r = RangeInclusive::new(-128i8, -128);
assert_eq!(r.next_back(), Some(-128));
assert_eq!(r.next_back(), None);
// degenerate
r = RangeInclusive::new(1, -1);
assert_eq!(r.size_hint(), (0, Some(0)));
assert_eq!(r.next(), None);
}
#[test]
fn test_range_is_empty() {
use core::f32::*;
assert!(!(0.0 .. 10.0).is_empty());
assert!( (-0.0 .. 0.0).is_empty());
assert!( (10.0 .. 0.0).is_empty());
assert!(!(NEG_INFINITY .. INFINITY).is_empty());
assert!( (EPSILON .. NAN).is_empty());
assert!( (NAN .. EPSILON).is_empty());
assert!( (NAN .. NAN).is_empty());
assert!(!(0.0 ..= 10.0).is_empty());
assert!(!(-0.0 ..= 0.0).is_empty());
assert!( (10.0 ..= 0.0).is_empty());
assert!(!(NEG_INFINITY ..= INFINITY).is_empty());
assert!( (EPSILON ..= NAN).is_empty());
assert!( (NAN ..= EPSILON).is_empty());
assert!( (NAN ..= NAN).is_empty());
}