diceprop 0.3.0

Mathematical properties for random testing
Documentation 
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

#![allow(dead_code)]
#![allow(unused_variables)]

#[cfg(test)]
mod associative_example {
    use diceprop::{Fun2, Set, props};
    use dicetest::prelude::*;

    #[test]
    #[should_panic] // Should fail in readme
    fn add_is_associative_for_small_f32() {
        Dicetest::repeatedly().run(|mut fate| {
            let set = Set::new("f32 ∩ [-100,100]", dice::f32(-100.0..=100.0));
            let vars = fate.roll(set.vars(["x", "y", "z"]));
            let add = Fun2::infix("+", |x, y| x + y);
            props::binop::associative(vars, add);
        })
    }
}

#[cfg(test)]
mod left_inverse_example {
    use diceprop::{Fun1, Set, props};
    use dicetest::prelude::*;

    #[test]
    #[should_panic] // Should fail in readme
    fn sqrt_is_left_inverse_of_sq_for_non_negative_f32() {
        Dicetest::repeatedly().run(|mut fate| {
            let set = Set::new("f32 ∩ [0,+∞]", dice::f32(0.0..));
            let vars = fate.roll(set.vars(["x"]));
            let sq = Fun1::postfix("²", |x| x * x);
            let sqrt = Fun1::new("√", |x: f32| x.sqrt());
            props::fun::left_inverse(vars, sq, sqrt);
        })
    }
}

#[cfg(test)]
mod partial_order_example {
    use diceprop::{Fun2, Set, props};
    use dicetest::prelude::*;

    #[test]
    #[should_panic] // Should fail in readme
    fn gt_is_partial_order_for_any_f32() {
        Dicetest::repeatedly().run(|mut fate| {
            let set = Set::new("f32", dice::any_f32());
            let vars = fate.roll(set.vars(["x", "y", "z"]));
            let gt = Fun2::infix("≤", |x, y| x <= y);
            props::binrel::partial_order(vars, gt);
        })
    }
}