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
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
// 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::cmp::{partial_min, partial_max};
use core::cmp::Ordering::{Less, Greater, Equal};
#[test]
fn test_int_totalord() {
assert_eq!(5.cmp(&10), Less);
assert_eq!(10.cmp(&5), Greater);
assert_eq!(5.cmp(&5), Equal);
assert_eq!((-5).cmp(&12), Less);
assert_eq!(12.cmp(&-5), Greater);
}
#[test]
fn test_mut_int_totalord() {
assert_eq!((&mut 5).cmp(&&mut 10), Less);
assert_eq!((&mut 10).cmp(&&mut 5), Greater);
assert_eq!((&mut 5).cmp(&&mut 5), Equal);
assert_eq!((&mut -5).cmp(&&mut 12), Less);
assert_eq!((&mut 12).cmp(&&mut -5), Greater);
}
#[test]
fn test_ordering_reverse() {
assert_eq!(Less.reverse(), Greater);
assert_eq!(Equal.reverse(), Equal);
assert_eq!(Greater.reverse(), Less);
}
#[test]
fn test_ordering_order() {
assert!(Less < Equal);
assert_eq!(Greater.cmp(&Less), Greater);
}
#[test]
fn test_partial_min() {
use core::f64::NAN;
let data_integer = [
// a, b, result
(0, 0, Some(0)),
(1, 0, Some(0)),
(0, 1, Some(0)),
(-1, 0, Some(-1)),
(0, -1, Some(-1))
];
let data_float = [
// a, b, result
(0.0f64, 0.0f64, Some(0.0f64)),
(1.0f64, 0.0f64, Some(0.0f64)),
(0.0f64, 1.0f64, Some(0.0f64)),
(-1.0f64, 0.0f64, Some(-1.0f64)),
(0.0f64, -1.0f64, Some(-1.0f64)),
(NAN, NAN, None),
(NAN, 1.0f64, None),
(1.0f64, NAN, None)
];
for &(a, b, result) in &data_integer {
assert!(partial_min(a, b) == result);
}
for &(a, b, result) in &data_float {
assert!(partial_min(a, b) == result);
}
}
#[test]
fn test_partial_max() {
use core::f64::NAN;
let data_integer = [
// a, b, result
(0, 0, Some(0)),
(1, 0, Some(1)),
(0, 1, Some(1)),
(-1, 0, Some(0)),
(0, -1, Some(0))
];
let data_float = [
// a, b, result
(0.0f64, 0.0f64, Some(0.0f64)),
(1.0f64, 0.0f64, Some(1.0f64)),
(0.0f64, 1.0f64, Some(1.0f64)),
(-1.0f64, 0.0f64, Some(0.0f64)),
(0.0f64, -1.0f64, Some(0.0f64)),
(NAN, NAN, None),
(NAN, 1.0f64, None),
(1.0f64, NAN, None)
];
for &(a, b, result) in &data_integer {
assert!(partial_max(a, b) == result);
}
for &(a, b, result) in &data_float {
assert!(partial_max(a, b) == result);
}
}
#[test]
fn test_user_defined_eq() {
use core::num::SignedInt;
// Our type.
struct SketchyNum {
num : int
}
// Our implementation of `PartialEq` to support `==` and `!=`.
impl PartialEq for SketchyNum {
// Our custom eq allows numbers which are near each other to be equal! :D
fn eq(&self, other: &SketchyNum) -> bool {
(self.num - other.num).abs() < 5
}
}
// Now these binary operators will work when applied!
assert!(SketchyNum {num: 37} == SketchyNum {num: 34});
assert!(SketchyNum {num: 25} != SketchyNum {num: 57});
}
|
