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Copy pathtests.rs
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176 lines (151 loc) · 3.45 KB
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//! Unit tests for bit-arrays.
#![cfg(test)]
use core::{
borrow::{
Borrow,
BorrowMut,
},
cell::Cell,
convert::TryFrom,
fmt::Debug,
hash::Hash,
ops::{
BitAnd,
BitOr,
BitXor,
Index,
IndexMut,
Range,
},
};
use static_assertions::*;
use crate::prelude::*;
#[test]
fn core_impl() {
assert_impl_all!(
BitArray: AsMut<BitSlice>,
AsRef<BitSlice>,
Borrow<BitSlice>,
BorrowMut<BitSlice>,
Debug,
Default,
Eq,
Hash,
Index<usize>,
Index<Range<usize>>,
IndexMut<Range<usize>>,
IntoIterator,
Ord,
PartialEq<&'static BitSlice>,
PartialEq<&'static mut BitSlice>,
PartialOrd<&'static BitSlice>,
TryFrom<&'static BitSlice>,
);
assert_impl_all!(&'static BitArray: TryFrom<&'static BitSlice>);
assert_impl_all!(&'static mut BitArray: TryFrom<&'static mut BitSlice>);
}
#[test]
fn bonus_impl() {
assert_impl_all!(
BitArray: BitAnd<&'static BitSlice>,
BitAnd<BitArray>,
BitOr<&'static BitSlice>,
BitOr<BitArray>,
BitXor<&'static BitSlice>,
BitXor<BitArray>,
);
}
#[test]
fn make_and_view() {
let data = [1u8, 2, 3, 4];
let bits = BitArray::<_, Msb0>::new(data);
assert_eq!(bits.as_bitslice(), data.view_bits::<Msb0>());
assert_eq!(bits.len(), data.view_bits::<Msb0>().len());
assert!(!bits.is_empty());
assert_eq!(bits.into_inner(), data);
}
#[test]
fn ops() {
let a = bitarr![0, 0, 1, 1];
let b = bitarr![0, 1, 0, 1];
let c = a & b;
assert_eq!(c, bitarr![0, 0, 0, 1]);
let d = a | b;
assert_eq!(d, bitarr![0, 1, 1, 1]);
let e = a ^ b;
assert_eq!(e, bitarr![0, 1, 1, 0]);
let mut f = !e;
assert_eq!(f[.. 4], bitarr![1, 0, 0, 1][.. 4]);
let _: &BitSlice = &*a;
let _: &mut BitSlice = &mut *f;
}
#[test]
fn traits() {
let a = BitArray::<[Cell<u16>; 3], Msb0>::default();
let b = a.clone();
assert_eq!(a, b);
let mut c = rand::random::<[u8; 4]>();
let d = c.view_bits_mut::<Lsb0>();
assert!(<&BitArray<[u8; 4], Lsb0>>::try_from(&*d).is_ok());
assert!(<&mut BitArray<[u8; 4], Lsb0>>::try_from(&mut *d).is_ok());
assert!(<&BitArray<[u8; 3], Lsb0>>::try_from(&d[4 .. 28]).is_err());
assert!(<&mut BitArray<[u8; 3], Lsb0>>::try_from(&mut d[4 .. 28]).is_err());
assert_eq!(BitArray::<[u8; 4], Lsb0>::try_from(&*d).unwrap(), *d);
}
#[test]
fn iter() {
let data = rand::random::<[u32; 4]>();
let bits = data.into_bitarray::<Lsb0>();
let view = data.view_bits::<Lsb0>();
assert!(
bits.into_iter()
.zip(view.iter().by_vals())
.all(|(a, b)| a == b)
);
let mut iter = bits.into_iter();
assert!(iter.next().is_some());
assert!(iter.next_back().is_some());
assert!(iter.nth(6).is_some());
assert!(iter.nth_back(6).is_some());
assert_eq!(iter.len(), 112);
assert_eq!(iter.as_bitslice(), &view[8 .. 120]);
assert_eq!(iter.as_mut_bitslice(), &view[8 .. 120]);
}
#[cfg(feature = "alloc")]
mod format {
#[cfg(not(feature = "std"))]
use alloc::format;
use core::{
any,
convert::TryFrom,
};
use super::{
BitArray,
Lsb0,
};
#[test]
fn render() {
let render = format!("{:?}", BitArray::<u8, Lsb0>::ZERO);
assert!(render.starts_with(&format!(
"BitArray<u8, {}>",
any::type_name::<Lsb0>(),
)));
assert!(render.ends_with("[0, 0, 0, 0, 0, 0, 0, 0]"));
assert_eq!(
format!(
"{:?}",
BitArray::<u8, Lsb0>::try_from(bits![u8, Lsb0; 0, 1])
.unwrap_err(),
),
"TryFromBitSliceError::UnequalLen(2 != 8)",
);
assert_eq!(
format!(
"{:?}",
BitArray::<u8, Lsb0>::try_from(&bits![u8, Lsb0; 0; 9][1 ..])
.unwrap_err(),
),
"TryFromBitSliceError::Misaligned",
);
}
}