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use super::*;
use crate::Flags;
#[test]
fn cases() {
case(
TestFlags::empty(),
&[(TestFlags::empty(), 0), (TestFlags::all(), 0)],
TestFlags::intersection,
);
case(
TestFlags::all(),
&[
(TestFlags::all(), 1 | 1 << 1 | 1 << 2),
(TestFlags::A, 1),
(TestFlags::from_bits_retain(1 << 3), 0),
],
TestFlags::intersection,
);
case(
TestFlags::from_bits_retain(1 << 3),
&[(TestFlags::from_bits_retain(1 << 3), 1 << 3)],
TestFlags::intersection,
);
case(
TestOverlapping::AB,
&[(TestOverlapping::BC, 1 << 1)],
TestOverlapping::intersection,
);
}
#[track_caller]
fn case<T: Flags + std::fmt::Debug + std::ops::BitAnd<Output = T> + std::ops::BitAndAssign + Copy>(
value: T,
inputs: &[(T, T::Bits)],
mut inherent: impl FnMut(T, T) -> T,
) where
T::Bits: std::fmt::Debug + PartialEq + Copy,
{
for (input, expected) in inputs {
assert_eq!(
*expected,
inherent(value, *input).bits(),
"{:?}.intersection({:?})",
value,
input
);
assert_eq!(
*expected,
Flags::intersection(value, *input).bits(),
"Flags::intersection({:?}, {:?})",
value,
input
);
assert_eq!(
*expected,
(value & *input).bits(),
"{:?} & {:?}",
value,
input
);
assert_eq!(
*expected,
{
let mut value = value;
value &= *input;
value
}
.bits(),
"{:?} &= {:?}",
value,
input,
);
}
}