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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/rust/base64/src/tests.rs | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/base64/src/tests.rs')
-rw-r--r-- | third_party/rust/base64/src/tests.rs | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/third_party/rust/base64/src/tests.rs b/third_party/rust/base64/src/tests.rs new file mode 100644 index 0000000000..7083b5433f --- /dev/null +++ b/third_party/rust/base64/src/tests.rs @@ -0,0 +1,117 @@ +use std::str; + +use rand::{ + distributions, + distributions::{Distribution as _, Uniform}, + seq::SliceRandom, + Rng, SeedableRng, +}; + +use crate::{ + alphabet, + encode::encoded_len, + engine::{ + general_purpose::{GeneralPurpose, GeneralPurposeConfig}, + Config, DecodePaddingMode, Engine, + }, +}; + +#[test] +fn roundtrip_random_config_short() { + // exercise the slower encode/decode routines that operate on shorter buffers more vigorously + roundtrip_random_config(Uniform::new(0, 50), 10_000); +} + +#[test] +fn roundtrip_random_config_long() { + roundtrip_random_config(Uniform::new(0, 1000), 10_000); +} + +pub fn assert_encode_sanity(encoded: &str, padded: bool, input_len: usize) { + let input_rem = input_len % 3; + let expected_padding_len = if input_rem > 0 { + if padded { + 3 - input_rem + } else { + 0 + } + } else { + 0 + }; + + let expected_encoded_len = encoded_len(input_len, padded).unwrap(); + + assert_eq!(expected_encoded_len, encoded.len()); + + let padding_len = encoded.chars().filter(|&c| c == '=').count(); + + assert_eq!(expected_padding_len, padding_len); + + let _ = str::from_utf8(encoded.as_bytes()).expect("Base64 should be valid utf8"); +} + +fn roundtrip_random_config(input_len_range: Uniform<usize>, iterations: u32) { + let mut input_buf: Vec<u8> = Vec::new(); + let mut encoded_buf = String::new(); + let mut rng = rand::rngs::SmallRng::from_entropy(); + + for _ in 0..iterations { + input_buf.clear(); + encoded_buf.clear(); + + let input_len = input_len_range.sample(&mut rng); + + let engine = random_engine(&mut rng); + + for _ in 0..input_len { + input_buf.push(rng.gen()); + } + + engine.encode_string(&input_buf, &mut encoded_buf); + + assert_encode_sanity(&encoded_buf, engine.config().encode_padding(), input_len); + + assert_eq!(input_buf, engine.decode(&encoded_buf).unwrap()); + } +} + +pub fn random_config<R: Rng>(rng: &mut R) -> GeneralPurposeConfig { + let mode = rng.gen(); + GeneralPurposeConfig::new() + .with_encode_padding(match mode { + DecodePaddingMode::Indifferent => rng.gen(), + DecodePaddingMode::RequireCanonical => true, + DecodePaddingMode::RequireNone => false, + }) + .with_decode_padding_mode(mode) + .with_decode_allow_trailing_bits(rng.gen()) +} + +impl distributions::Distribution<DecodePaddingMode> for distributions::Standard { + fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> DecodePaddingMode { + match rng.gen_range(0..=2) { + 0 => DecodePaddingMode::Indifferent, + 1 => DecodePaddingMode::RequireCanonical, + _ => DecodePaddingMode::RequireNone, + } + } +} + +pub fn random_alphabet<R: Rng>(rng: &mut R) -> &'static alphabet::Alphabet { + ALPHABETS.choose(rng).unwrap() +} + +pub fn random_engine<R: Rng>(rng: &mut R) -> GeneralPurpose { + let alphabet = random_alphabet(rng); + let config = random_config(rng); + GeneralPurpose::new(alphabet, config) +} + +const ALPHABETS: &[alphabet::Alphabet] = &[ + alphabet::URL_SAFE, + alphabet::STANDARD, + alphabet::CRYPT, + alphabet::BCRYPT, + alphabet::IMAP_MUTF7, + alphabet::BIN_HEX, +]; |