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use std::{
collections::hash_map::DefaultHasher,
fs::File,
hash::{Hash, Hasher},
io::{Error, Read},
path::Path,
};
pub fn filehash(file_path: &mut String) -> Result<u64, Error> {
let tmp = file_path.trim();
let path_input = Path::new(&tmp);
let path_canonicalized = path_input.canonicalize()?;
let path_os_string = path_canonicalized.as_os_str();
let mut buffer: Vec<u8> = Vec::new();
let mut f = File::open(path_os_string)?;
f.read_to_end(&mut buffer)?;
let mut hasher = DefaultHasher::new();
buffer.hash(&mut hasher);
let finished_hash = hasher.finish();
return Ok(finished_hash);
}
#[cfg(test)]
mod tests {
use super::filehash;
#[test]
fn it_generates_consistent_results_png() {
let mut mock_file1 = String::from("./mock/mock.png");
let mut mock_file2 = String::from("./mock/mock.png");
let result1 = filehash(&mut mock_file1);
let result2 = filehash(&mut mock_file2);
assert_eq!(result1.unwrap(), result2.unwrap());
}
#[test]
fn it_generates_consistent_results_txt() {
let mut mock_file1 = String::from("./mock/mock.txt");
let mut mock_file2 = String::from("./mock/mock.txt");
let result1 = filehash(&mut mock_file1);
let result2 = filehash(&mut mock_file2);
assert_eq!(result1.unwrap(), result2.unwrap());
}
#[test]
fn it_generates_consistent_results_json() {
let mut mock_file1 = String::from("./mock/mock.json");
let mut mock_file2 = String::from("./mock/mock.json");
let result1 = filehash(&mut mock_file1);
let result2 = filehash(&mut mock_file2);
assert_eq!(result1.unwrap(), result2.unwrap());
}
}