leyline-http 0.1.1

HTTP client that mimics browsers on the wire
Documentation 
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use super::*;

#[test]
fn encode_small_value() {
    let mut buf = Vec::new();
    encode(10, 5, 0x00, &mut buf);
    assert_eq!(buf, vec![0x0A]);
}

#[test]
fn encode_prefix_boundary() {
    let mut buf = Vec::new();
    encode(1337, 5, 0x00, &mut buf);
    assert_eq!(buf, vec![0x1F, 0x9A, 0x0A]);
}

#[test]
fn encode_at_max_prefix() {
    let mut buf = Vec::new();
    encode(42, 8, 0x00, &mut buf);
    assert_eq!(buf, vec![42]);
}

#[test]
fn decode_small_value() {
    let (val, consumed) = decode(10, 5, &[], 0).unwrap();
    assert_eq!(val, 10);
    assert_eq!(consumed, 0);
}

#[test]
fn decode_multi_byte() {
    let src = [0x9A, 0x0A];
    let (val, consumed) = decode(0x1F, 5, &src, 0).unwrap();
    assert_eq!(val, 1337);
    assert_eq!(consumed, 2);
}

#[test]
fn roundtrip_various_values() {
    for &(value, prefix_bits) in &[
        (0, 5),
        (1, 5),
        (30, 5),
        (31, 5),
        (127, 7),
        (128, 7),
        (255, 8),
        (256, 8),
        (1337, 5),
        (65535, 4),
        (0, 1),
    ] {
        let mut buf = Vec::new();
        encode(value, prefix_bits, 0x00, &mut buf);

        let first = buf[0];
        let (decoded, _) = decode(first, prefix_bits, &buf[1..], 0).unwrap();
        assert_eq!(
            decoded, value,
            "roundtrip failed for value={value}, prefix={prefix_bits}"
        );
    }
}

#[test]
fn decode_overflow_rejected() {
    let src = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x0F];
    let result = decode(0x1F, 5, &src, 0);
    assert!(result.is_err());
}

#[test]
fn decode_rejects_values_past_u31_max() {
    let mut src = Vec::new();
    let mut rem: u64 = (1u64 << 32) - 31;
    while rem >= 128 {
        src.push((rem & 0x7F) as u8 | 0x80);
        rem >>= 7;
    }
    src.push(rem as u8);
    assert!(decode(0x1F, 5, &src, 0).is_err(), "2^32 must be rejected");
}

#[test]
fn decode_accepts_max_legal_value() {
    let mut buf = Vec::new();
    encode(0x7FFF_FFFF, 5, 0x00, &mut buf);
    let (val, _) = decode(buf[0], 5, &buf[1..], 0).unwrap();
    assert_eq!(val, 0x7FFF_FFFF);
}