#[derive(Clone, Debug, Eq, PartialEq, Hash)]
pub enum HeaderError {
UnexpectedVersion {
version_number: u8,
},
}
impl core::fmt::Display for HeaderError {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
use HeaderError::*;
match self {
UnexpectedVersion { version_number } => write!(f, "IPv6 Header Error: Encountered '{}' as IP version number in the IPv6 header (must be '6' in an IPv6 header).", version_number),
}
}
}
#[cfg(feature = "std")]
#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
impl std::error::Error for HeaderError {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
None
}
}
#[cfg(test)]
mod tests {
use super::{HeaderError::*, *};
use alloc::format;
use std::{
collections::hash_map::DefaultHasher,
error::Error,
hash::{Hash, Hasher},
};
#[test]
fn debug() {
assert_eq!(
"UnexpectedVersion { version_number: 1 }",
format!("{:?}", UnexpectedVersion { version_number: 1 })
);
}
#[test]
fn clone_eq_hash() {
let err = HeaderError::UnexpectedVersion { version_number: 6 };
assert_eq!(err, err.clone());
let hash_a = {
let mut hasher = DefaultHasher::new();
err.hash(&mut hasher);
hasher.finish()
};
let hash_b = {
let mut hasher = DefaultHasher::new();
err.clone().hash(&mut hasher);
hasher.finish()
};
assert_eq!(hash_a, hash_b);
}
#[test]
fn fmt() {
assert_eq!(
"IPv6 Header Error: Encountered '1' as IP version number in the IPv6 header (must be '6' in an IPv6 header).",
format!("{}", UnexpectedVersion{ version_number: 1 })
);
}
#[cfg(feature = "std")]
#[test]
fn source() {
let values = [UnexpectedVersion { version_number: 0 }];
for v in values {
assert!(v.source().is_none());
}
}
}