beve 1.3.0

#![deny(warnings)]

use serde::{Deserialize, Serialize};

// Minimal SIZE encoder for tests (matches src/size.rs behavior)
fn write_size_for_test(mut n: u64, out: &mut Vec<u8>) {
    if n < (1 << 6) {
        out.push((n as u8) << 2);
        return;
    }
    if n < (1 << 14) {
        out.push((((n & 0x3f) as u8) << 2) | 0b01);
        n >>= 6;
        out.push(n as u8);
        return;
    }
    if n < (1 << 30) {
        out.push((((n & 0x3f) as u8) << 2) | 0b10);
        n >>= 6;
        out.push(n as u8);
        out.push((n >> 8) as u8);
        out.push((n >> 16) as u8);
        return;
    }
    out.push((((n & 0x3f) as u8) << 2) | 0b11);
    n >>= 6;
    for i in 0..7 {
        out.push((n >> (i * 8)) as u8);
    }
}

#[test]
fn fast_numeric_vs_serde() {
    macro_rules! check {
        ($t:ty, $val:expr) => {
            let v: Vec<$t> = $val;
            let fast = beve::to_vec_typed_slice(&v);
            let via_serde = beve::to_vec(&v).unwrap();
            assert_eq!(
                fast,
                via_serde,
                "mismatch for {}",
                std::any::type_name::<$t>()
            );
        };
    }
    check!(u8, vec![1, 2, 3, 4, 5]);
    check!(u16, vec![1, 512, 1024]);
    check!(u32, vec![1, 2, 3, 4]);
    check!(u64, vec![9, 10, 11]);
    check!(i8, vec![-1, 0, 1]);
    check!(i16, vec![-1, 0, 1, 1024]);
    check!(i32, vec![-1, 0, 1, 1_000_000]);
    check!(i64, vec![-1, 0, 1]);
    check!(f32, vec![1.0, -2.5, 3.25]);
    check!(f64, vec![1.0, -2.5, 3.25]);
}

#[test]
fn fast_bool_vs_serde() {
    let v = vec![
        true, false, true, true, false, true, false, true, false, true,
    ];
    let fast = beve::to_vec_bool_slice(&v);
    let via_serde = beve::to_vec(&v).unwrap();
    assert_eq!(fast, via_serde);

    // Ensure deserialization from fast-path bytes matches original
    let back: Vec<bool> = beve::from_slice(&fast).unwrap();
    assert_eq!(v, back);
}

#[test]
fn bool_packing_uses_lsb_order() {
    let bytes = beve::to_vec_bool_slice(&[true, false, true]);
    assert_eq!(bytes, vec![0x1c, 0x0c, 0x05]);
}

#[test]
fn fast_string_vs_serde() {
    let v = vec!["a".to_string(), "bb".to_string(), "ccc".to_string()];
    let fast = beve::to_vec_string_slice(&v);
    let via_serde = beve::to_vec(&v).unwrap();
    assert_eq!(fast, via_serde);

    let v2: Vec<&str> = vec!["x", "yy", "zzz"];
    let fast2 = beve::to_vec_str_slice(&v2);
    let via_serde2 = beve::to_vec(&v2).unwrap();
    assert_eq!(fast2, via_serde2);
}

#[test]
fn fast_bool_in_struct_vs_serde() {
    #[derive(Serialize, Deserialize, Debug, PartialEq)]
    struct S {
        flags: Vec<bool>,
    }

    let v = vec![true, false, true, true, false, false, true, false, true];

    // Build expected struct bytes manually using fast-path for the field value
    let mut expected = Vec::new();
    expected.push(0x03); // string-keyed object header
    write_size_for_test(1, &mut expected); // one field
    let key = "flags";
    write_size_for_test(key.len() as u64, &mut expected);
    expected.extend_from_slice(key.as_bytes());
    expected.extend_from_slice(&beve::to_vec_bool_slice(&v));

    // Compare to serde-produced bytes
    let s = S { flags: v.clone() };
    let via_serde = beve::to_vec(&s).unwrap();
    assert_eq!(expected, via_serde);

    // And ensure from_slice can read the same payload back
    let back: S = beve::from_slice(&expected).unwrap();
    assert_eq!(back, s);
}

#[test]
fn fast_numeric_in_struct_vs_serde() {
    #[derive(Serialize, Deserialize, Debug, PartialEq)]
    struct S<T> {
        data: Vec<T>,
    }

    macro_rules! check {
        ($t:ty, $val:expr) => {
            let v: Vec<$t> = $val;
            // Build expected object with typed array as the field value
            let mut expected = Vec::new();
            expected.push(0x03); // string-keyed object header
            write_size_for_test(1, &mut expected); // one field
            let key = "data";
            write_size_for_test(key.len() as u64, &mut expected);
            expected.extend_from_slice(key.as_bytes());
            expected.extend_from_slice(&beve::to_vec_typed_slice(&v));

            let s = S { data: v.clone() };
            let via_serde = beve::to_vec(&s).unwrap();
            assert_eq!(
                expected,
                via_serde,
                "mismatch for {}",
                std::any::type_name::<$t>()
            );

            // Deserialization roundtrip
            let back: S<$t> = beve::from_slice(&expected).unwrap();
            assert_eq!(back, s);
        };
    }

    check!(u8, vec![1, 2, 3, 4, 5]);
    check!(u16, vec![1, 512, 1024]);
    check!(u32, vec![1, 2, 3, 4]);
    check!(u64, vec![9, 10, 11]);
    check!(i8, vec![-1, 0, 1]);
    check!(i16, vec![-1, 0, 1, 1024]);
    check!(i32, vec![-1, 0, 1, 1_000_000]);
    check!(i64, vec![-1, 0, 1]);
    check!(f32, vec![1.0, -2.5, 3.25]);
    check!(f64, vec![1.0, -2.5, 3.25]);
}

#[test]
fn fast_string_in_struct_vs_serde() {
    #[derive(Serialize, Deserialize, Debug, PartialEq)]
    struct S {
        labels: Vec<String>,
    }

    let v = vec!["alpha".to_string(), "beta".to_string(), "gamma".to_string()];

    let mut expected = Vec::new();
    expected.push(0x03); // string-keyed object header
    write_size_for_test(1, &mut expected); // one field
    let key = "labels";
    write_size_for_test(key.len() as u64, &mut expected);
    expected.extend_from_slice(key.as_bytes());
    expected.extend_from_slice(&beve::to_vec_string_slice(&v));

    let s = S { labels: v.clone() };
    let via_serde = beve::to_vec(&s).unwrap();
    assert_eq!(expected, via_serde);

    let back: S = beve::from_slice(&expected).unwrap();
    assert_eq!(back, s);
}