#![cfg(feature = "compression-lz4")]
#![allow(
clippy::approx_constant,
clippy::useless_vec,
clippy::len_zero,
clippy::unnecessary_cast,
clippy::redundant_closure,
clippy::too_many_arguments,
clippy::type_complexity,
clippy::needless_borrow,
clippy::enum_variant_names,
clippy::upper_case_acronyms,
clippy::inconsistent_digit_grouping,
clippy::unit_cmp,
clippy::assertions_on_constants,
clippy::iter_on_single_items,
clippy::expect_fun_call,
clippy::redundant_pattern_matching,
variant_size_differences,
clippy::absurd_extreme_comparisons,
clippy::nonminimal_bool,
clippy::for_kv_map,
clippy::needless_range_loop,
clippy::single_match,
clippy::collapsible_if,
clippy::needless_return,
clippy::redundant_clone,
clippy::map_entry,
clippy::match_single_binding,
clippy::bool_comparison,
clippy::derivable_impls,
clippy::manual_range_contains,
clippy::needless_borrows_for_generic_args,
clippy::manual_map,
clippy::vec_init_then_push,
clippy::identity_op,
clippy::manual_flatten,
clippy::single_char_pattern,
clippy::search_is_some,
clippy::option_map_unit_fn,
clippy::while_let_on_iterator,
clippy::clone_on_copy,
clippy::box_collection,
clippy::redundant_field_names,
clippy::ptr_arg,
clippy::large_enum_variant,
clippy::match_ref_pats,
clippy::needless_pass_by_value,
clippy::unused_unit,
clippy::let_and_return,
clippy::suspicious_else_formatting,
clippy::manual_strip,
clippy::match_like_matches_macro,
clippy::from_over_into,
clippy::wrong_self_convention,
clippy::inherent_to_string,
clippy::new_without_default,
clippy::unnecessary_wraps,
clippy::field_reassign_with_default,
clippy::manual_find,
clippy::unnecessary_lazy_evaluations,
clippy::should_implement_trait,
clippy::missing_safety_doc,
clippy::unusual_byte_groupings,
clippy::bool_assert_comparison,
clippy::zero_prefixed_literal,
clippy::await_holding_lock,
clippy::manual_saturating_arithmetic,
clippy::explicit_counter_loop,
clippy::needless_lifetimes,
clippy::single_component_path_imports,
clippy::uninlined_format_args,
clippy::iter_cloned_collect,
clippy::manual_str_repeat,
clippy::excessive_precision,
clippy::precedence,
clippy::unnecessary_literal_unwrap
)]
use oxicode::compression::{compress, decompress, Compression};
fn compress_lz4(data: &[u8]) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
compress(data, Compression::Lz4).map_err(|e| Box::new(e) as Box<dyn std::error::Error>)
}
fn decompress_lz4(data: &[u8]) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
decompress(data).map_err(|e| Box::new(e) as Box<dyn std::error::Error>)
}
use oxicode::{decode_from_slice, encode_to_vec, Decode, Encode};
#[derive(Debug, PartialEq, Encode, Decode)]
struct Telemetry {
device_id: u32,
timestamp: u64,
readings: Vec<f32>,
labels: Vec<String>,
}
#[test]
fn test_u32_lz4_roundtrip() {
let val: u32 = 987654321;
let enc = encode_to_vec(&val).expect("encode u32");
let compressed = compress_lz4(&enc).expect("compress u32");
let decompressed = decompress_lz4(&compressed).expect("decompress u32");
let (decoded, _): (u32, usize) = decode_from_slice(&decompressed).expect("decode u32");
assert_eq!(val, decoded);
}
#[test]
fn test_string_lz4_roundtrip() {
let val = String::from("Hello, LZ4 compression world!");
let enc = encode_to_vec(&val).expect("encode string");
let compressed = compress_lz4(&enc).expect("compress string");
let decompressed = decompress_lz4(&compressed).expect("decompress string");
let (decoded, _): (String, usize) = decode_from_slice(&decompressed).expect("decode string");
assert_eq!(val, decoded);
}
#[test]
fn test_vec_u8_lz4_roundtrip() {
let val: Vec<u8> = vec![10, 20, 30, 40, 50, 60, 70, 80, 90, 100];
let enc = encode_to_vec(&val).expect("encode vec u8");
let compressed = compress_lz4(&enc).expect("compress vec u8");
let decompressed = decompress_lz4(&compressed).expect("decompress vec u8");
let (decoded, _): (Vec<u8>, usize) = decode_from_slice(&decompressed).expect("decode vec u8");
assert_eq!(val, decoded);
}
#[test]
fn test_telemetry_struct_lz4_roundtrip() {
let val = Telemetry {
device_id: 42,
timestamp: 1700000000000,
readings: vec![1.1, 2.2, 3.3, 4.4, 5.5],
labels: vec![
String::from("temp"),
String::from("pressure"),
String::from("humidity"),
],
};
let enc = encode_to_vec(&val).expect("encode telemetry");
let compressed = compress_lz4(&enc).expect("compress telemetry");
let decompressed = decompress_lz4(&compressed).expect("decompress telemetry");
let (decoded, _): (Telemetry, usize) =
decode_from_slice(&decompressed).expect("decode telemetry");
assert_eq!(val, decoded);
}
#[test]
fn test_compressed_differs_from_uncompressed_u32() {
let val: u32 = 42;
let enc = encode_to_vec(&val).expect("encode u32");
let compressed = compress_lz4(&enc).expect("compress u32");
assert_ne!(
enc, compressed,
"compressed bytes should differ from uncompressed"
);
}
#[test]
fn test_compressed_differs_from_uncompressed_string() {
let val = String::from("This is a test string for LZ4 compression difference check");
let enc = encode_to_vec(&val).expect("encode string");
let compressed = compress_lz4(&enc).expect("compress string");
assert_ne!(
enc, compressed,
"compressed bytes should differ from uncompressed"
);
}
#[test]
fn test_large_repetitive_vec_u8_compresses_smaller() {
let val: Vec<u8> = vec![0xABu8; 5000];
let enc = encode_to_vec(&val).expect("encode large repetitive vec u8");
let compressed = compress_lz4(&enc).expect("compress large repetitive vec u8");
assert!(
compressed.len() < enc.len(),
"compressed size {} should be smaller than uncompressed size {}",
compressed.len(),
enc.len()
);
}
#[test]
fn test_large_repetitive_vec_u32_roundtrip() {
let val: Vec<u32> = vec![0xDEADBEEFu32; 1000];
let enc = encode_to_vec(&val).expect("encode large repetitive vec u32");
let compressed = compress_lz4(&enc).expect("compress large repetitive vec u32");
let decompressed = decompress_lz4(&compressed).expect("decompress large repetitive vec u32");
let (decoded, _): (Vec<u32>, usize) =
decode_from_slice(&decompressed).expect("decode large repetitive vec u32");
assert_eq!(val, decoded);
}
#[test]
fn test_vec_string_100_identical_roundtrip() {
let val: Vec<String> = (0..100)
.map(|_| String::from("repeated_string_value"))
.collect();
let enc = encode_to_vec(&val).expect("encode vec of identical strings");
let compressed = compress_lz4(&enc).expect("compress vec of identical strings");
let decompressed = decompress_lz4(&compressed).expect("decompress vec of identical strings");
let (decoded, _): (Vec<String>, usize) =
decode_from_slice(&decompressed).expect("decode vec of identical strings");
assert_eq!(val, decoded);
}
#[test]
fn test_vec_telemetry_roundtrip() {
let val: Vec<Telemetry> = (0..10)
.map(|i| Telemetry {
device_id: i,
timestamp: 1700000000000 + i as u64 * 1000,
readings: vec![i as f32 * 0.1, i as f32 * 0.2, i as f32 * 0.3],
labels: vec![format!("sensor_{}", i), format!("channel_{}", i)],
})
.collect();
let enc = encode_to_vec(&val).expect("encode vec of telemetry");
let compressed = compress_lz4(&enc).expect("compress vec of telemetry");
let decompressed = decompress_lz4(&compressed).expect("decompress vec of telemetry");
let (decoded, _): (Vec<Telemetry>, usize) =
decode_from_slice(&decompressed).expect("decode vec of telemetry");
assert_eq!(val, decoded);
}
#[test]
fn test_empty_vec_u8_lz4_roundtrip() {
let val: Vec<u8> = Vec::new();
let enc = encode_to_vec(&val).expect("encode empty vec u8");
let compressed = compress_lz4(&enc).expect("compress empty vec u8");
let decompressed = decompress_lz4(&compressed).expect("decompress empty vec u8");
let (decoded, _): (Vec<u8>, usize) =
decode_from_slice(&decompressed).expect("decode empty vec u8");
assert_eq!(val, decoded);
}
#[test]
fn test_option_string_some_lz4_roundtrip() {
let val: Option<String> = Some(String::from("optional value present"));
let enc = encode_to_vec(&val).expect("encode option string some");
let compressed = compress_lz4(&enc).expect("compress option string some");
let decompressed = decompress_lz4(&compressed).expect("decompress option string some");
let (decoded, _): (Option<String>, usize) =
decode_from_slice(&decompressed).expect("decode option string some");
assert_eq!(val, decoded);
}
#[test]
fn test_option_string_none_lz4_roundtrip() {
let val: Option<String> = None;
let enc = encode_to_vec(&val).expect("encode option string none");
let compressed = compress_lz4(&enc).expect("compress option string none");
let decompressed = decompress_lz4(&compressed).expect("decompress option string none");
let (decoded, _): (Option<String>, usize) =
decode_from_slice(&decompressed).expect("decode option string none");
assert_eq!(val, decoded);
}
#[test]
fn test_large_random_vec_u64_lcg_roundtrip() {
let mut state = 12345u64;
let vals: Vec<u64> = (0..200)
.map(|_| {
state = state
.wrapping_mul(6364136223846793005)
.wrapping_add(1442695040888963407);
state
})
.collect();
let enc = encode_to_vec(&vals).expect("encode lcg vec u64");
let compressed = compress_lz4(&enc).expect("compress lcg vec u64");
let decompressed = decompress_lz4(&compressed).expect("decompress lcg vec u64");
let (decoded, _): (Vec<u64>, usize) =
decode_from_slice(&decompressed).expect("decode lcg vec u64");
assert_eq!(vals, decoded);
}
#[test]
fn test_compress_same_data_twice_identical_output() {
let val: Vec<u8> = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
let enc = encode_to_vec(&val).expect("encode for idempotency test");
let compressed1 = compress_lz4(&enc).expect("compress first time");
let compressed2 = compress_lz4(&enc).expect("compress second time");
assert_eq!(
compressed1, compressed2,
"compressing same data twice should yield identical bytes"
);
}
#[test]
fn test_decompress_wrong_bytes_returns_error() {
let bad_data = b"not_lz4_data";
let result = decompress_lz4(bad_data);
assert!(
result.is_err(),
"decompress_lz4 on invalid data should return an error"
);
}
#[test]
fn test_compressed_size_positive_for_small_inputs() {
let val: u32 = 1;
let enc = encode_to_vec(&val).expect("encode small u32");
let compressed = compress_lz4(&enc).expect("compress small u32");
assert!(
compressed.len() > 0,
"compressed output must not be empty even for small inputs"
);
}
#[test]
fn test_bool_lz4_roundtrip() {
let val: bool = true;
let enc = encode_to_vec(&val).expect("encode bool");
let compressed = compress_lz4(&enc).expect("compress bool");
let decompressed = decompress_lz4(&compressed).expect("decompress bool");
let (decoded, _): (bool, usize) = decode_from_slice(&decompressed).expect("decode bool");
assert_eq!(val, decoded);
}
#[test]
fn test_u128_lz4_roundtrip() {
let val: u128 = 340282366920938463463374607431768211455u128;
let enc = encode_to_vec(&val).expect("encode u128");
let compressed = compress_lz4(&enc).expect("compress u128");
let decompressed = decompress_lz4(&compressed).expect("decompress u128");
let (decoded, _): (u128, usize) = decode_from_slice(&decompressed).expect("decode u128");
assert_eq!(val, decoded);
}
#[test]
fn test_nested_vec_vec_u8_lz4_roundtrip() {
let val: Vec<Vec<u8>> = vec![
vec![1, 2, 3],
vec![4, 5, 6, 7],
vec![],
vec![8, 9],
vec![10, 11, 12, 13, 14],
];
let enc = encode_to_vec(&val).expect("encode nested vec vec u8");
let compressed = compress_lz4(&enc).expect("compress nested vec vec u8");
let decompressed = decompress_lz4(&compressed).expect("decompress nested vec vec u8");
let (decoded, _): (Vec<Vec<u8>>, usize) =
decode_from_slice(&decompressed).expect("decode nested vec vec u8");
assert_eq!(val, decoded);
}
#[test]
fn test_telemetry_unicode_labels_lz4_roundtrip() {
let val = Telemetry {
device_id: 99,
timestamp: 9999999999999,
readings: vec![0.0, 1.0, 2.0],
labels: vec![
String::from("温度センサー"),
String::from("気圧計"),
String::from("湿度センサー"),
String::from("Ångström"),
String::from("Ñoño"),
],
};
let enc = encode_to_vec(&val).expect("encode telemetry with unicode labels");
let compressed = compress_lz4(&enc).expect("compress telemetry with unicode labels");
let decompressed =
decompress_lz4(&compressed).expect("decompress telemetry with unicode labels");
let (decoded, _): (Telemetry, usize) =
decode_from_slice(&decompressed).expect("decode telemetry with unicode labels");
assert_eq!(val, decoded);
}
#[test]
fn test_checksum_decompressed_matches_original_encoded_bytes() {
let val = Telemetry {
device_id: 7,
timestamp: 1234567890,
readings: vec![3.14, 2.71, 1.41],
labels: vec![String::from("pi"), String::from("e"), String::from("sqrt2")],
};
let enc = encode_to_vec(&val).expect("encode for checksum test");
let compressed = compress_lz4(&enc).expect("compress for checksum test");
let decompressed = decompress_lz4(&compressed).expect("decompress for checksum test");
assert_eq!(
enc, decompressed,
"decompressed bytes must exactly match original encoded bytes"
);
}