ps_uuid/implementations/
as_ref.rs

1use crate::{UUID, UUID_BYTES};
2
3impl AsRef<[u8; UUID_BYTES]> for UUID {
4    fn as_ref(&self) -> &[u8; UUID_BYTES] {
5        self.as_bytes()
6    }
7}
8
9impl AsRef<[u8]> for UUID {
10    fn as_ref(&self) -> &[u8] {
11        self.as_bytes()
12    }
13}
14
15#[cfg(test)]
16mod tests {
17    use crate::{UUID, UUID_BYTES};
18
19    #[test]
20    fn as_ref_slice_matches_as_bytes() {
21        let uuid = UUID::from(0x0123_4567_89ab_cdef_u128);
22        let slice: &[u8] = uuid.as_ref();
23        assert_eq!(slice, uuid.as_bytes().as_slice());
24    }
25
26    #[test]
27    fn as_ref_array_matches_as_bytes() {
28        let uuid = UUID::from(0x0123_4567_89ab_cdef_u128);
29        let arr: &[u8; UUID_BYTES] = uuid.as_ref();
30        assert_eq!(arr, uuid.as_bytes());
31        assert!(std::ptr::eq(arr, uuid.as_bytes()));
32    }
33
34    #[test]
35    fn as_ref_slice_length() {
36        let uuid = UUID::nil();
37        let slice: &[u8] = uuid.as_ref();
38        assert_eq!(slice.len(), UUID_BYTES);
39    }
40
41    #[test]
42    fn as_ref_nil() {
43        let uuid = UUID::nil();
44        let slice: &[u8] = uuid.as_ref();
45        assert!(slice.iter().all(|&b| b == 0));
46    }
47
48    #[test]
49    fn as_ref_max() {
50        let uuid = UUID::max();
51        let slice: &[u8] = uuid.as_ref();
52        assert!(slice.iter().all(|&b| b == 0xFF));
53    }
54
55    #[test]
56    fn works_with_generic_as_ref_u8() {
57        fn accepts_as_ref(v: &impl AsRef<[u8]>) -> usize {
58            v.as_ref().len()
59        }
60        let uuid = UUID::from(42u128);
61        assert_eq!(accepts_as_ref(&uuid), UUID_BYTES);
62    }
63
64    #[test]
65    fn works_with_generic_as_ref_array() {
66        fn accepts_as_ref(v: &impl AsRef<[u8; UUID_BYTES]>) -> u8 {
67            v.as_ref()[0]
68        }
69        let uuid = UUID::from(0xFF00_0000_0000_0000_0000_0000_0000_0000_u128);
70        assert_eq!(accepts_as_ref(&uuid), 0xFF);
71    }
72}
ps_uuid/implementations/as_ref.rs

ps_uuid/implementations/
as_ref.rs
