titleformat-rs 0.2.0

A foobar2000 titleformat parser for rust
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
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

use crate::environment::Value;
use crate::functions::num::to_int;
use crate::types::Error;
use crate::types::Error::*;

/*
 * $iflonger(str,n,then,else)
 *
 * Compares the length of the string str to the number n, if str is longer
 * than n characters, the then part is evaluated and its value returned.
 * Otherwise the else part is evaluated and its value returned.
 */
pub fn iflonger(args: Vec<Value>) -> Result<Value, Error> {
    if args.len() != 4 {
        return Err(InvalidNativeFunctionArgs(
            String::from("iflonger"),
            args.len(),
        ));
    }
    if args[0].val.len() > to_int(&args[1].val) as usize {
        Ok(args[2].clone())
    } else {
        Ok(args[3].clone())
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::environment::value_string;

    #[test]
    fn wrong_n_arguments() {
        assert_eq!(
            iflonger(vec![value_string("blah", false)]).err().unwrap(),
            InvalidNativeFunctionArgs(String::from("iflonger"), 1)
        );
    }

    #[test]
    fn longer() {
        assert_eq!(
            iflonger(vec![
                value_string("string", false),
                value_string("1", true),
                value_string("true", false),
                value_string("false", false)
            ])
            .unwrap(),
            value_string("true", false)
        );
    }

    #[test]
    fn shorter() {
        assert_eq!(
            iflonger(vec![
                value_string("string", false),
                value_string("10", true),
                value_string("true", false),
                value_string("false", false)
            ])
            .unwrap(),
            value_string("false", false)
        );
    }

    #[test]
    fn equal() {
        assert_eq!(
            iflonger(vec![
                value_string("string", false),
                value_string("6", true),
                value_string("true", false),
                value_string("false", false)
            ])
            .unwrap(),
            value_string("false", false)
        );
    }
}