cadmpeg-core 0.6.8

Bounded byte decoding primitives and codec resource policy for cadmpeg.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

// SPDX-License-Identifier: Apache-2.0

use std::io::Cursor;

use super::WholeInput;
use crate::decode::View;

#[test]
fn a_view_over_every_byte_is_whole() {
    let bytes = b"0123456789";
    let view = View::over_retained(bytes);
    let mut cursor = Cursor::new(bytes.as_slice());
    cursor.set_position(4);
    let whole = WholeInput::of_source(view, &mut cursor)
        .expect("the source length is readable")
        .expect("the view covers every byte");
    assert_eq!(whole.view().window(), bytes.as_slice());
    assert_eq!(cursor.position(), 4);
}

#[test]
fn a_shorter_view_is_not_whole() {
    let bytes = b"0123456789";
    let view = View::over_retained(&bytes[..5]);
    let mut cursor = Cursor::new(bytes.as_slice());
    cursor.set_position(4);
    let whole = WholeInput::of_source(view, &mut cursor).expect("the source length is readable");
    assert!(whole.is_none());
    assert_eq!(cursor.position(), 4);
}

#[test]
fn a_view_that_does_not_start_at_zero_is_not_whole() {
    let bytes = b"0123456789";
    let view = View::over_retained(bytes)
        .child(5, 10)
        .expect("the child range sits inside the parent");
    assert_ne!(view.start(), 0);
    assert_eq!(view.window().len(), 5);
    let mut cursor = Cursor::new(view.window());
    cursor.set_position(2);
    let whole = WholeInput::of_source(view, &mut cursor).expect("the source length is readable");
    assert!(whole.is_none());
    assert_eq!(cursor.position(), 2);
}