qubit-function 0.16.0

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

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

//! Unit tests for Mutator types (stateless Fn(&mut T))

use qubit_function::{
    ArcMutator,
    BoxMutator,
    Mutator,
    MutatorOnce,
    RcMutator,
};

// ============================================================================
// Mutator Default Implementation Tests
// ============================================================================

/// Test struct that implements Mutator to test default methods
struct TestMutator {
    multiplier: i32,
}

impl TestMutator {
    fn new(multiplier: i32) -> Self {
        TestMutator { multiplier }
    }
}

impl Mutator<i32> for TestMutator {
    fn apply(&self, input: &mut i32) {
        *input *= self.multiplier;
    }
}

impl Clone for TestMutator {
    fn clone(&self) -> Self {
        TestMutator {
            multiplier: self.multiplier,
        }
    }
}

// ============================================================================
// BoxMutator Tests
// ============================================================================

#[cfg(test)]
mod wrapper_composition_tests {
    use super::{
        Mutator,
        MutatorOnce,
    };

    #[test]
    fn test_closure_mutate() {
        let closure = |x: &mut i32| *x *= 2;
        let mut value = 5;
        closure.apply(&mut value);
        assert_eq!(value, 10);
    }
}

// ============================================================================
// Unified Interface Tests
// ============================================================================