request_hash.rs - mozsearch

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

use std::collections::hash_map::DefaultHasher;

use std::hash::{Hash, Hasher};

#[derive(Clone, Debug, PartialEq)]

pub struct RequestHash(String);

impl RequestHash {

    pub fn new(value: &impl Hash) -> Self {

        let mut hasher = DefaultHasher::new();

        value.hash(&mut hasher);

        RequestHash(format!("{:x}", hasher.finish()))

impl From<&str> for RequestHash {

    fn from(s: &str) -> Self {

        RequestHash(s.to_string())

impl From<String> for RequestHash {

    fn from(s: String) -> Self {

        RequestHash(s)

impl std::fmt::Display for RequestHash {

    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {

        write!(f, "{}", self.0)

#[cfg(test)]

mod tests {

    use super::*;

    #[test]

    fn test_same_value_produces_same_hash() {

        let hash1 = RequestHash::new(&("GET", "https://example.com/api"));

        let hash2 = RequestHash::new(&("GET", "https://example.com/api"));

        assert_eq!(hash1, hash2);

    #[test]

    fn test_different_values_produce_different_hashes() {

        let hash1 = RequestHash::new(&("GET", "https://example.com/api1"));

        let hash2 = RequestHash::new(&("GET", "https://example.com/api2"));

        assert_ne!(hash1, hash2);

    #[test]

    fn test_request_hash_from_string() {

        let hash_str = "abc123def456";

        let hash = RequestHash::from(hash_str);

        assert_eq!(hash.to_string(), hash_str);

        let hash_string = String::from("xyz789");

        let hash2 = RequestHash::from(hash_string);

        assert_eq!(hash2.to_string(), "xyz789");