src/external/arbitrary.rs


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

//! Specialized fuzzing for flags types using `arbitrary`.

use crate::Flags;

/// Get a random known flags value.
pub fn arbitrary<'a, B: Flags>(
    u: &mut arbitrary::Unstructured<'a>,
) -> arbitrary::Result<B>
where
    B::Bits: arbitrary::Arbitrary<'a>
{
    B::from_bits(u.arbitrary()?).ok_or_else(|| arbitrary::Error::IncorrectFormat)
}

#[cfg(test)]
mod tests {
    use arbitrary::Arbitrary;

    bitflags! {
        #[derive(Arbitrary)]
        struct Color: u32 {
            const RED = 0x1;
            const GREEN = 0x2;
            const BLUE = 0x4;
        }
    }

    #[test]
    fn test_arbitrary() {
        let mut unstructured = arbitrary::Unstructured::new(&[0_u8; 256]);
        let _color = Color::arbitrary(&mut unstructured);
    }
}