slack_messaging/
macros.rs

1macro_rules! pipe {
2    ($val:expr => $f:path) => {{
3        $f($val)
4    }};
5    ($val:expr => $f:path | $($g:path)|*) => {{
6        pipe!($f($val) => $($g)|*)
7    }};
8}
9
10/// Shorthand to build [`PlainText`](crate::composition_objects::PlainText) object.
11///
12/// ```
13/// # use slack_messaging::plain_text;
14/// # use slack_messaging::composition_objects::PlainText;
15/// let text = plain_text!("Hello, World!");
16/// let expected = PlainText::builder()
17///     .text("Hello, World!")
18///     .build();
19///
20/// assert_eq!(text, expected);
21///
22/// // You can use this like format! macro.
23/// let greet = "Hi";
24/// let name = "Tanaka";
25///
26/// let text = plain_text!("{greet}, {name}!");
27/// let expected = PlainText::builder()
28///     .text("Hi, Tanaka!")
29///     .build();
30///
31/// assert_eq!(text, expected);
32/// ```
33#[macro_export]
34macro_rules! plain_text {
35    ($fmt:expr) => {
36        $crate::composition_objects::PlainText::builder()
37            .text(format!($fmt))
38            .build()
39    };
40    ($fmt:expr, $($arg:tt)+) => {
41        $crate::composition_objects::PlainText::builder()
42            .text(format!($fmt, $($arg)+))
43            .build()
44    };
45}
46
47/// Shorthand to build [`MrkdwnText`](crate::composition_objects::MrkdwnText) object.
48///
49/// ```
50/// # use slack_messaging::mrkdwn;
51/// # use slack_messaging::composition_objects::MrkdwnText;
52/// let text = mrkdwn!("Hello, World!");
53/// let expected = MrkdwnText::builder()
54///     .text("Hello, World!")
55///     .build();
56///
57/// assert_eq!(text, expected);
58///
59/// // You can use this like format! macro.
60/// let greet = "Hi";
61/// let name = "Tanaka";
62///
63/// let text = mrkdwn!("{greet}, {name}!");
64/// let expected = MrkdwnText::builder()
65///     .text("Hi, Tanaka!")
66///     .build();
67///
68/// assert_eq!(text, expected);
69/// ```
70#[macro_export]
71macro_rules! mrkdwn {
72    ($fmt:expr) => {
73        $crate::composition_objects::MrkdwnText::builder()
74            .text(format!($fmt))
75            .build()
76    };
77    ($fmt:expr, $($arg:tt)+) => {
78        $crate::composition_objects::MrkdwnText::builder()
79            .text(format!($fmt, $($arg)+))
80            .build()
81    };
82}
83
84#[cfg(test)]
85mod tests {
86    use crate::composition_objects::{PlainText, MrkdwnText};
87
88    #[test]
89    fn pipe_chains_multiple_functions() {
90        fn add_one(v: usize) -> usize {
91            v + 1
92        }
93
94        fn times_two(v: usize) -> usize {
95            v * 2
96        }
97
98        fn divide_five(v: usize) -> usize {
99            v / 5
100        }
101
102        let v = pipe!(4 => add_one | times_two);
103        assert_eq!(v, 10);
104
105        let v = pipe!(4 => add_one | times_two | divide_five);
106        assert_eq!(v, 2);
107    }
108
109    #[test]
110    fn it_works_macro_plain_text_given_expression() {
111        let text = plain_text!("Hello, Tanaka!");
112        let expected = PlainText::builder().text("Hello, Tanaka!").build();
113        assert_eq!(text, expected);
114    }
115
116    #[test]
117    fn it_works_macro_plain_text_given_expression_and_tokens() {
118        let name = "Tanaka";
119        let text = plain_text!("Hello, {name}!");
120        let expected = PlainText::builder().text("Hello, Tanaka!").build();
121        assert_eq!(text, expected);
122    }
123
124    #[test]
125    fn it_works_macro_mrkdwn_given_expression() {
126        let text = mrkdwn!("Hello, Tanaka!");
127        let expected = MrkdwnText::builder().text("Hello, Tanaka!").build();
128        assert_eq!(text, expected);
129    }
130
131    #[test]
132    fn it_works_macro_mrkdwn_given_expression_and_tokens() {
133        let name = "Tanaka";
134        let text = mrkdwn!("Hello, {name}!");
135        let expected = MrkdwnText::builder().text("Hello, Tanaka!").build();
136        assert_eq!(text, expected);
137    }
138}
slack_messaging/macros.rs

slack_messaging/
macros.rs
