karbon_framework/validation/constraints/string/
not_blank.rs

1use crate::validation::constraints::{Constraint, ConstraintResult, ConstraintViolation};
2
3/// Validates that a value is not blank (not empty and not only whitespace).
4///
5/// Equivalent to Symfony's `NotBlank` constraint.
6pub struct NotBlank {
7    pub message: String,
8}
9
10impl Default for NotBlank {
11    fn default() -> Self {
12        Self {
13            message: "This value should not be blank.".to_string(),
14        }
15    }
16}
17
18impl NotBlank {
19    pub fn new() -> Self {
20        Self::default()
21    }
22
23    pub fn with_message(mut self, message: impl Into<String>) -> Self {
24        self.message = message.into();
25        self
26    }
27}
28
29impl Constraint for NotBlank {
30    fn validate(&self, value: &str) -> ConstraintResult {
31        if value.trim().is_empty() {
32            return Err(ConstraintViolation::new(
33                self.name(),
34                &self.message,
35                value,
36            ));
37        }
38        Ok(())
39    }
40
41    fn name(&self) -> &'static str {
42        "NotBlank"
43    }
44}
45
46#[cfg(test)]
47mod tests {
48    use super::*;
49
50    #[test]
51    fn test_valid_values() {
52        let constraint = NotBlank::new();
53        assert!(constraint.validate("hello").is_ok());
54        assert!(constraint.validate("0").is_ok());
55        assert!(constraint.validate("false").is_ok());
56        assert!(constraint.validate(" a ").is_ok());
57    }
58
59    #[test]
60    fn test_blank_values() {
61        let constraint = NotBlank::new();
62        assert!(constraint.validate("").is_err());
63        assert!(constraint.validate("   ").is_err());
64        assert!(constraint.validate("\t").is_err());
65        assert!(constraint.validate("\n").is_err());
66    }
67
68    #[test]
69    fn test_custom_message() {
70        let constraint = NotBlank::new().with_message("Le champ est requis.");
71        let err = constraint.validate("").unwrap_err();
72        assert_eq!(err.message, "Le champ est requis.");
73    }
74}
karbon_framework/validation/constraints/string/not_blank.rs

karbon_framework/validation/constraints/string/
not_blank.rs
