tanzim-validate 0.1.0

Validate and coerce tanzim-value configuration trees
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

use crate::Validator;
use crate::error::{Error, ErrorKind};
use tanzim_value::{Value, ValueType};

/// Accepts a semantic version string such as `1.4.2` or `2.0.0-rc.1`.
#[derive(Debug, Clone, Default)]
pub struct Semver;

impl Semver {
    pub fn new() -> Self {
        Self
    }
}

impl Validator for Semver {
    fn validate(&self, value: &mut Value) -> Result<(), Error> {
        let text = match value {
            Value::String(text) => text,
            other => {
                return Err(Error::new(ErrorKind::Type {
                    expected: ValueType::String,
                    found: other.type_name(),
                }));
            }
        };
        match text.parse::<semver::Version>() {
            Ok(_) => Ok(()),
            Err(_) => Err(Error::new(ErrorKind::Format {
                expected: "semantic version",
            })),
        }
    }
}

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

    #[test]
    fn accepts_and_rejects() {
        assert!(
            Semver::new()
                .validate(&mut Value::String("1.2.3".into()))
                .is_ok()
        );
        assert!(
            Semver::new()
                .validate(&mut Value::String("1.2".into()))
                .is_err()
        );
    }
}