uptrakit-web-api-types 0.0.2

Shared HTTP request/response types for the Uptrakit web API
Documentation 
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use std::fmt;

/// Error returned when request field validation fails.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ValidationError {
    pub field: &'static str,
    pub message: String,
}

impl fmt::Display for ValidationError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}: {}", self.field, self.message)
    }
}

impl std::error::Error for ValidationError {}

/// Trait for validating request types before processing.
pub trait Validate {
    fn validate(&self) -> Result<(), ValidationError>;
}

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

    #[test]
    fn validation_error_display() {
        let err = ValidationError {
            field: "email",
            message: "must contain @".to_string(),
        };
        assert_eq!(err.to_string(), "email: must contain @");
    }
}