karbon_framework/validation/constraints/collection/
not_empty.rs

1use crate::validation::constraints::{CollectionConstraint, ConstraintResult, ConstraintViolation};
2
3/// Validates that a collection is not empty.
4pub struct NotEmpty {
5    pub message: String,
6}
7
8impl Default for NotEmpty {
9    fn default() -> Self {
10        Self {
11            message: "This collection should not be empty.".to_string(),
12        }
13    }
14}
15
16impl NotEmpty {
17    pub fn new() -> Self {
18        Self::default()
19    }
20
21    pub fn with_message(mut self, message: impl Into<String>) -> Self {
22        self.message = message.into();
23        self
24    }
25}
26
27impl CollectionConstraint for NotEmpty {
28    fn validate_slice<T>(&self, value: &[T]) -> ConstraintResult {
29        if value.is_empty() {
30            return Err(ConstraintViolation::new(
31                self.name(),
32                &self.message,
33                "[]",
34            ));
35        }
36        Ok(())
37    }
38
39    fn name(&self) -> &'static str {
40        "NotEmpty"
41    }
42}
43
44#[cfg(test)]
45mod tests {
46    use super::*;
47
48    #[test]
49    fn test_not_empty() {
50        let constraint = NotEmpty::new();
51        assert!(constraint.validate_slice(&[1, 2, 3]).is_ok());
52        assert!(constraint.validate_slice(&["a"]).is_ok());
53    }
54
55    #[test]
56    fn test_empty() {
57        let constraint = NotEmpty::new();
58        assert!(constraint.validate_slice::<i32>(&[]).is_err());
59    }
60
61    #[test]
62    fn test_custom_message() {
63        let constraint = NotEmpty::new().with_message("Ajoutez au moins un élément.");
64        let err = constraint.validate_slice::<i32>(&[]).unwrap_err();
65        assert_eq!(err.message, "Ajoutez au moins un élément.");
66    }
67}
karbon_framework/validation/constraints/collection/not_empty.rs

karbon_framework/validation/constraints/collection/
not_empty.rs
