data_test/
lib.rs

1#![forbid(unsafe_code)]
2#![warn(missing_docs)]
3#![warn(clippy::pedantic)]
4#![doc = include_str!("../README.md")]
5
6
7/// Create sub module with tests for multiple input data
8/// 
9/// # Examples
10/// 
11/// ```no_run
12/// #[cfg(test)]
13/// mod tests {
14///     use data_test::data_test;
15/// 
16///     #[test]
17///     fn it_works() {
18///         assert_eq!(2 + 2, 4);
19///     }
20/// 
21///     data_test!{
22///         fn is_equal(input, expected) => {
23///             assert_eq!(input, expected);
24///         }
25///         - a (1, 1)
26///         - b (2, 2)
27///         - c (3, 3)
28///         - d (4, 4)
29///         - e (5, 5)
30///         - f ("hello world", "hello world")
31///     }
32/// }
33/// // cargo test output:
34/// // test tests::it_works ... ok
35/// // test tests::is_equal::a ... ok
36/// // test tests::is_equal::b ... ok
37/// // test tests::is_equal::c ... ok
38/// // test tests::is_equal::d ... ok
39/// // test tests::is_equal::e ... ok
40/// // test tests::is_equal::f ... ok
41/// # fn main() {}
42/// ```
43// NOTE: the doc test only can check if compile but doc test does not run tests inside of doc test, then use no_run attribute
44#[macro_export]
45macro_rules! data_test {
46    {
47        fn $prefix:ident $input:pat => $main:block
48        $(- $name:ident $($value:tt),*)*
49    } => {
50        mod $prefix {
51            #[allow(unused_imports)]
52            use super::*;
53            $(
54
55                #[test]
56                fn $name () {
57                    let $input = ($($value),*);
58                    $main
59                }
60            )*
61        }
62    };
63    {$(
64        fn $prefix:ident $input:pat => $main:block
65        $(- $name:ident $($value:tt),*)*
66    )*} => {$(
67        $crate::data_test!{
68            fn $prefix $input => $main
69            $(- $name ($($value),*))*
70        }
71    )*};
72}
73
74
75#[cfg(test)]
76mod tests {
77    use super::data_test;
78
79    #[test]
80    fn it_works() {
81        assert_eq!(2 + 2, 4);
82    }
83
84    data_test!{
85        fn is_equal(input, expected) => {
86            assert_eq!(input, expected);
87        }
88        - a (1, 1)
89        - b (1 + 1, 2)
90        - c ("hello", "hello")
91        - d ("\u{1f9ea}", "\u{1f9ea}")
92    }
93
94    data_test!{
95        fn is_not_equal(input, expected) => {
96            assert_ne!(input, expected);
97        }
98        - a (1, 2)
99        - b 1, 3
100        - c (1, 4)
101
102        fn is_not_zero input => {
103            assert_ne!(input, 0);
104        }
105        - a 1
106        - b (2)
107        - c 3
108
109        fn test_multiplication(first, second, expected) => {
110            assert_eq!(first * second, expected);
111        }
112        - a (2, 2,   4)
113        - b (2, 3,   6)
114        - c (3, 3,   9)
115        - d (9, 9, 9*9)
116    }
117}
data_test/lib.rs

data_test/
lib.rs
