82 lines
2.2 KiB
Rust
82 lines
2.2 KiB
Rust
use crate::{decode_config, encode::encoded_size, encode_config_buf, CharacterSet, Config};
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use std::str;
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use rand::{
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distributions::{Distribution, Uniform},
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seq::SliceRandom,
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FromEntropy, Rng,
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};
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#[test]
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fn roundtrip_random_config_short() {
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// exercise the slower encode/decode routines that operate on shorter buffers more vigorously
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roundtrip_random_config(Uniform::new(0, 50), 10_000);
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}
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#[test]
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fn roundtrip_random_config_long() {
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roundtrip_random_config(Uniform::new(0, 1000), 10_000);
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}
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pub fn assert_encode_sanity(encoded: &str, config: Config, input_len: usize) {
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let input_rem = input_len % 3;
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let expected_padding_len = if input_rem > 0 {
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if config.pad {
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3 - input_rem
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} else {
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0
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}
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} else {
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0
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};
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let expected_encoded_len = encoded_size(input_len, config).unwrap();
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assert_eq!(expected_encoded_len, encoded.len());
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let padding_len = encoded.chars().filter(|&c| c == '=').count();
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assert_eq!(expected_padding_len, padding_len);
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let _ = str::from_utf8(encoded.as_bytes()).expect("Base64 should be valid utf8");
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}
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fn roundtrip_random_config(input_len_range: Uniform<usize>, iterations: u32) {
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let mut input_buf: Vec<u8> = Vec::new();
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let mut encoded_buf = String::new();
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let mut rng = rand::rngs::SmallRng::from_entropy();
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for _ in 0..iterations {
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input_buf.clear();
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encoded_buf.clear();
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let input_len = input_len_range.sample(&mut rng);
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let config = random_config(&mut rng);
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for _ in 0..input_len {
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input_buf.push(rng.gen());
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}
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encode_config_buf(&input_buf, config, &mut encoded_buf);
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assert_encode_sanity(&encoded_buf, config, input_len);
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assert_eq!(input_buf, decode_config(&encoded_buf, config).unwrap());
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}
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}
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pub fn random_config<R: Rng>(rng: &mut R) -> Config {
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const CHARSETS: &[CharacterSet] = &[
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CharacterSet::UrlSafe,
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CharacterSet::Standard,
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CharacterSet::Crypt,
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CharacterSet::ImapMutf7,
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CharacterSet::BinHex,
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];
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let charset = *CHARSETS.choose(rng).unwrap();
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Config::new(charset, rng.gen())
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}
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