qubit-function 0.18.2

Functional programming traits and Box/Rc/Arc adapters for Rust, inspired by Java functional interfaces
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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

// =============================================================================
//    Copyright (c) 2025 - 2026 Haixing Hu.
//
//    SPDX-License-Identifier: Apache-2.0
//
//    Licensed under the Apache License, Version 2.0.
// =============================================================================

//! Unit tests for the predicate module.

use qubit_function::predicates::ArcPredicate;
use qubit_function::predicates::BoxPredicate;
use qubit_function::predicates::Predicate;
use qubit_function::predicates::RcPredicate;

mod not_composition_tests {
    use super::ArcPredicate;
    use super::BoxPredicate;
    use super::Predicate;
    use super::RcPredicate;

    #[test]
    fn test_box_not_and_composition() {
        let is_positive = BoxPredicate::new(|x: &i32| *x > 0);
        let is_even = BoxPredicate::new(|x: &i32| x % 2 == 0);

        let not_positive = !is_positive;
        let combined = not_positive.and(is_even);

        assert!(combined.test(&-2));
        assert!(!combined.test(&-3));
        assert!(!combined.test(&4));
    }

    #[test]
    fn test_box_not_or_composition() {
        let is_positive = BoxPredicate::new(|x: &i32| *x > 0);
        let is_even = BoxPredicate::new(|x: &i32| x % 2 == 0);

        let not_positive = !is_positive;
        let combined = not_positive.or(is_even);

        assert!(combined.test(&-3));
        assert!(combined.test(&4));
        assert!(!combined.test(&3));
    }

    #[test]
    fn test_rc_not_and_composition() {
        let is_positive = RcPredicate::new(|x: &i32| *x > 0);
        let is_even = RcPredicate::new(|x: &i32| x % 2 == 0);

        let not_positive = !&is_positive;
        let combined = not_positive.and(is_even);

        assert!(combined.test(&-2));
        assert!(!combined.test(&-3));
        assert!(!combined.test(&4));
    }

    #[test]
    fn test_rc_not_or_composition() {
        let is_positive = RcPredicate::new(|x: &i32| *x > 0);
        let is_even = RcPredicate::new(|x: &i32| x % 2 == 0);

        let not_positive = !&is_positive;
        let combined = not_positive.or(is_even);

        assert!(combined.test(&-3));
        assert!(combined.test(&4));
        assert!(!combined.test(&3));
    }

    #[test]
    fn test_arc_not_and_composition() {
        let is_positive = ArcPredicate::new(|x: &i32| *x > 0);
        let is_even = ArcPredicate::new(|x: &i32| x % 2 == 0);

        let not_positive = !&is_positive;
        let combined = not_positive.and(is_even);

        assert!(combined.test(&-2));
        assert!(!combined.test(&-3));
        assert!(!combined.test(&4));
    }

    #[test]
    fn test_arc_not_or_composition() {
        let is_positive = ArcPredicate::new(|x: &i32| *x > 0);
        let is_even = ArcPredicate::new(|x: &i32| x % 2 == 0);

        let not_positive = !&is_positive;
        let combined = not_positive.or(is_even);

        assert!(combined.test(&-3));
        assert!(combined.test(&4));
        assert!(!combined.test(&3));
    }

    #[test]
    fn test_double_not() {
        let is_positive = BoxPredicate::new(|x: &i32| *x > 0);
        let not_positive = !is_positive;
        let double_not = !not_positive;

        assert!(double_not.test(&5));
        assert!(!double_not.test(&-5));
    }

    #[test]
    fn test_not_with_nand() {
        let is_positive = BoxPredicate::new(|x: &i32| *x > 0);
        let is_even = BoxPredicate::new(|x: &i32| x % 2 == 0);

        let not_positive = !is_positive;
        let combined = not_positive.nand(is_even);

        assert!(combined.test(&-3));
        assert!(combined.test(&3));
        assert!(!combined.test(&-2));
    }

    #[test]
    fn test_not_with_xor() {
        let is_positive = BoxPredicate::new(|x: &i32| *x > 0);
        let is_even = BoxPredicate::new(|x: &i32| x % 2 == 0);

        let not_positive = !is_positive;
        let combined = not_positive.xor(is_even);

        assert!(combined.test(&-3));
        assert!(combined.test(&4));
        assert!(!combined.test(&-2));
        assert!(!combined.test(&3));
    }

    #[test]
    fn test_not_with_nor() {
        let is_positive = BoxPredicate::new(|x: &i32| *x > 0);
        let is_even = BoxPredicate::new(|x: &i32| x % 2 == 0);

        let not_positive = !is_positive;
        let combined = not_positive.nor(is_even);

        assert!(combined.test(&3));
        assert!(!combined.test(&-3));
        assert!(!combined.test(&4));
        assert!(!combined.test(&-2));
    }
}