#![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::{
config, decode_from_slice, decode_from_slice_with_config, encode_into_slice, encode_to_vec,
encode_to_vec_with_config, Decode, Encode,
};
#[derive(Debug, PartialEq, Encode, Decode)]
struct SimpleStruct {
a: u32,
b: u64,
}
#[derive(Debug, PartialEq, Encode, Decode)]
enum SimpleEnum {
Alpha,
Beta(u32),
Gamma { x: i16, y: i16 },
}
#[test]
fn test_decode_from_slice_exact_size_buffer() {
let encoded = encode_to_vec(&42u32).expect("encode u32");
let (value, consumed): (u32, usize) = decode_from_slice(&encoded).expect("decode u32");
assert_eq!(value, 42u32);
assert_eq!(
consumed,
encoded.len(),
"consumed must equal exact buffer length"
);
}
#[test]
fn test_decode_from_slice_with_trailing_bytes() {
let mut buf = encode_to_vec(&7u32).expect("encode u32");
let encoded_len = buf.len();
buf.extend_from_slice(&[0xAA, 0xBB, 0xCC, 0xDD]);
let (value, consumed): (u32, usize) = decode_from_slice(&buf).expect("decode u32");
assert_eq!(value, 7u32);
assert_eq!(consumed, encoded_len);
assert!(
consumed < buf.len(),
"consumed must be less than total buffer"
);
}
#[test]
fn test_encode_into_slice_u32_preallocated_buffer() {
let mut buf = [0u8; 10];
let n = encode_into_slice(100u32, &mut buf, config::standard()).expect("encode into slice");
assert!(n > 0, "must write at least one byte");
assert!(n <= 10, "must not exceed buffer size");
let (value, _): (u32, usize) = decode_from_slice(&buf[..n]).expect("decode from slice");
assert_eq!(value, 100u32);
}
#[test]
fn test_encode_into_slice_returns_bytes_written() {
let mut buf = [0u8; 32];
let n = encode_into_slice(255u8, &mut buf, config::standard()).expect("encode u8");
assert_eq!(n, 1, "u8 must encode to exactly 1 byte");
}
#[test]
fn test_encode_into_slice_buffer_too_small_returns_error() {
let long_str = "hello world this is a long string".to_string();
let mut tiny_buf = [0u8; 2];
let result = encode_into_slice(long_str, &mut tiny_buf, config::standard());
assert!(result.is_err(), "encode into too-small buffer must fail");
}
#[test]
fn test_encode_into_slice_exact_size_buffer_works() {
let val: u8 = 77;
let mut buf = [0u8; 1];
let n = encode_into_slice(val, &mut buf, config::standard()).expect("encode exact buffer");
assert_eq!(n, 1);
assert_eq!(buf[0], val, "single-byte value must equal raw byte");
}
#[test]
fn test_multiple_sequential_decode_from_slice_with_offset() {
let mut enc = Vec::new();
enc.extend_from_slice(&encode_to_vec(&42u32).expect("encode 1"));
enc.extend_from_slice(&encode_to_vec(&99u32).expect("encode 2"));
let (first, n): (u32, usize) = decode_from_slice(&enc).expect("decode 1");
let (second, _): (u32, usize) = decode_from_slice(&enc[n..]).expect("decode 2");
assert_eq!(first, 42u32);
assert_eq!(second, 99u32);
}
#[test]
fn test_decode_from_slice_concatenated_values() {
let mut enc = Vec::new();
enc.extend_from_slice(&encode_to_vec(&1000u64).expect("encode u64"));
enc.extend_from_slice(&encode_to_vec(&2000u64).expect("encode u64"));
let (first, n): (u64, usize) = decode_from_slice(&enc).expect("decode first");
let (second, _): (u64, usize) = decode_from_slice(&enc[n..]).expect("decode second");
assert_eq!(first, 1000u64);
assert_eq!(second, 2000u64);
}
#[test]
fn test_encode_to_vec_decode_from_slice_string_roundtrip() {
let original = String::from("roundtrip test string");
let encoded = encode_to_vec(&original).expect("encode String");
let (decoded, consumed): (String, usize) = decode_from_slice(&encoded).expect("decode String");
assert_eq!(decoded, original);
assert_eq!(consumed, encoded.len());
}
#[test]
fn test_batch_encode_decode_many_u32_values() {
let values: Vec<u32> = (0u32..20).collect();
let encoded = encode_to_vec(&values).expect("encode Vec<u32>");
let (decoded, consumed): (Vec<u32>, usize) =
decode_from_slice(&encoded).expect("decode Vec<u32>");
assert_eq!(decoded, values);
assert_eq!(consumed, encoded.len());
}
#[test]
fn test_decode_from_slice_with_config_fixed_int() {
let cfg = config::standard().with_fixed_int_encoding();
let encoded = encode_to_vec_with_config(&0xCAFEu32, cfg).expect("encode fixed-int");
let (decoded, consumed): (u32, usize) =
decode_from_slice_with_config(&encoded, cfg).expect("decode fixed-int");
assert_eq!(decoded, 0xCAFEu32);
assert_eq!(consumed, encoded.len());
}
#[test]
fn test_decode_from_slice_with_config_big_endian() {
let cfg = config::standard().with_big_endian();
let val = 0xDEADBEEFu32;
let encoded = encode_to_vec_with_config(&val, cfg).expect("encode big-endian");
let (decoded, consumed): (u32, usize) =
decode_from_slice_with_config(&encoded, cfg).expect("decode big-endian");
assert_eq!(decoded, val);
assert_eq!(consumed, encoded.len());
}
#[test]
fn test_encode_into_slice_fixed_int_writes_4_bytes_for_u32() {
let cfg = config::standard().with_fixed_int_encoding();
let mut buf = [0u8; 16];
let n = encode_into_slice(1u32, &mut buf, cfg).expect("encode fixed-int u32");
assert_eq!(n, 4, "fixed-int u32 must always encode to 4 bytes");
}
#[test]
fn test_encode_into_slice_bytes_match_encode_to_vec() {
let val = 0x12345678u32;
let vec_bytes = encode_to_vec(&val).expect("encode_to_vec");
let mut slice_buf = [0u8; 16];
let n = encode_into_slice(val, &mut slice_buf, config::standard()).expect("encode_into_slice");
assert_eq!(
&slice_buf[..n],
vec_bytes.as_slice(),
"slice and vec bytes must match"
);
}
#[test]
fn test_decode_from_slice_struct_roundtrip() {
let original = SimpleStruct {
a: 42,
b: 1_000_000,
};
let encoded = encode_to_vec(&original).expect("encode struct");
let (decoded, consumed): (SimpleStruct, usize) =
decode_from_slice(&encoded).expect("decode struct");
assert_eq!(decoded, original);
assert_eq!(consumed, encoded.len());
}
#[test]
fn test_decode_from_slice_enum_roundtrip() {
let variants = [
SimpleEnum::Alpha,
SimpleEnum::Beta(99),
SimpleEnum::Gamma { x: -10, y: 20 },
];
for variant in &variants {
let encoded = encode_to_vec(variant).expect("encode enum");
let (decoded, consumed): (SimpleEnum, usize) =
decode_from_slice(&encoded).expect("decode enum");
assert_eq!(&decoded, variant);
assert_eq!(consumed, encoded.len());
}
}
#[test]
fn test_decode_from_slice_zero_bytes_returns_error() {
let empty: &[u8] = &[];
let result: oxicode::Result<(u32, usize)> = decode_from_slice(empty);
assert!(result.is_err(), "decoding from empty slice must fail");
}
#[test]
fn test_decode_from_slice_one_zero_byte_as_u8() {
let buf: &[u8] = &[0u8];
let (value, consumed): (u8, usize) = decode_from_slice(buf).expect("decode single zero byte");
assert_eq!(value, 0u8);
assert_eq!(consumed, 1);
}
#[test]
fn test_encode_into_slice_writes_at_offset_zero() {
let val = 42u32;
let mut buf = [0xFFu8; 16];
let n = encode_into_slice(val, &mut buf, config::standard()).expect("encode");
let (decoded, _): (u32, usize) = decode_from_slice(&buf[..n]).expect("decode front");
assert_eq!(decoded, val, "value at offset 0 must decode correctly");
assert!(
buf[n..].iter().all(|&b| b == 0xFF),
"bytes after written region must be untouched"
);
}
#[test]
fn test_encode_into_slice_then_decode_from_slice_roundtrip() {
let original: u64 = 0xDEAD_BEEF_CAFE_BABEu64;
let mut buf = [0u8; 16];
let n = encode_into_slice(original, &mut buf, config::standard()).expect("encode");
let (decoded, consumed): (u64, usize) = decode_from_slice(&buf[..n]).expect("decode");
assert_eq!(decoded, original);
assert_eq!(consumed, n);
}
#[test]
fn test_multiple_encode_into_slice_non_overlapping_regions() {
let val_a = 111u32;
let val_b = 222u32;
let val_c = 333u32;
let mut buf = [0u8; 64];
let n_a = encode_into_slice(val_a, &mut buf, config::standard()).expect("encode a");
let n_b = encode_into_slice(val_b, &mut buf[n_a..], config::standard()).expect("encode b");
let n_c =
encode_into_slice(val_c, &mut buf[n_a + n_b..], config::standard()).expect("encode c");
let (dec_a, _): (u32, usize) = decode_from_slice(&buf[..n_a]).expect("decode a");
let (dec_b, _): (u32, usize) = decode_from_slice(&buf[n_a..n_a + n_b]).expect("decode b");
let (dec_c, _): (u32, usize) =
decode_from_slice(&buf[n_a + n_b..n_a + n_b + n_c]).expect("decode c");
assert_eq!(dec_a, val_a);
assert_eq!(dec_b, val_b);
assert_eq!(dec_c, val_c);
}
#[test]
fn test_decode_from_slice_consumed_count_for_vec_u8() {
let data: Vec<u8> = vec![10, 20, 30, 40, 50, 60, 70, 80];
let encoded = encode_to_vec(&data).expect("encode Vec<u8>");
let expected_consumed = encoded.len();
let mut buf = encoded.clone();
buf.extend_from_slice(&[0xDE, 0xAD]);
let (decoded, consumed): (Vec<u8>, usize) = decode_from_slice(&buf).expect("decode Vec<u8>");
assert_eq!(decoded, data);
assert_eq!(
consumed, expected_consumed,
"consumed must equal encoded length, not total buffer"
);
}