tanzim_validate/
non_empty.rs

1use crate::error::{Error, ErrorKind};
2use crate::{Meta, Validator};
3use tanzim_value::{Value, ValueType};
4
5/// (`non_empty` feature) Accepts a non-blank string (at least one non-whitespace character).
6#[derive(Debug, Clone, Default)]
7pub struct NonEmpty {
8    meta: Meta,
9}
10
11impl NonEmpty {
12    pub fn new() -> Self {
13        Self::default()
14    }
15
16    /// Attach human-facing metadata (name, description, examples, default, output conversion).
17    pub fn with_meta(mut self, meta: Meta) -> Self {
18        self.meta = meta;
19        self
20    }
21}
22
23impl Validator for NonEmpty {
24    fn meta(&self) -> &Meta {
25        &self.meta
26    }
27
28    fn meta_mut(&mut self) -> &mut Meta {
29        &mut self.meta
30    }
31
32    fn check(&self, value: &mut Value) -> Result<(), Error> {
33        let text = match value {
34            Value::String(text) => text,
35            other => {
36                return Err(Error::new(ErrorKind::Type {
37                    expected: ValueType::String,
38                    found: other.type_name(),
39                }));
40            }
41        };
42        if text.trim().is_empty() {
43            return Err(Error::new(ErrorKind::TooShort {
44                len: text.chars().count(),
45                min: 1,
46            }));
47        }
48        Ok(())
49    }
50}
51
52#[cfg(test)]
53mod tests {
54    use super::*;
55
56    #[test]
57    fn rejects_blank() {
58        assert!(
59            NonEmpty::new()
60                .validate(&mut Value::String("x".into()))
61                .is_ok()
62        );
63        assert!(
64            NonEmpty::new()
65                .validate(&mut Value::String("   ".into()))
66                .is_err()
67        );
68    }
69}
tanzim_validate/non_empty.rs

tanzim_validate/
non_empty.rs
