32 lines
691 B
Rust
32 lines
691 B
Rust
use std::ops::Deref;
|
|
|
|
use crate::{InputType, InputValueError};
|
|
|
|
pub fn min_items<T: Deref<Target = [E]> + InputType, E>(
|
|
value: &T,
|
|
len: usize,
|
|
) -> Result<(), InputValueError<T>> {
|
|
if value.deref().len() >= len {
|
|
Ok(())
|
|
} else {
|
|
Err(format!(
|
|
"the value length is {}, must be greater than or equal to {}",
|
|
value.deref().len(),
|
|
len
|
|
)
|
|
.into())
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn test_min_items() {
|
|
assert!(min_items(&vec![1, 2], 3).is_err());
|
|
assert!(min_items(&vec![1, 2, 3], 3).is_ok());
|
|
assert!(min_items(&vec![1, 2, 3, 4], 3).is_ok());
|
|
}
|
|
}
|