Revision control
Copy as Markdown
Other Tools
use super::*;
use crate::Flags;
#[test]
fn cases() {
case(
TestFlags::empty(),
&[
(TestFlags::empty(), 0),
(TestFlags::all(), 1 | 1 << 1 | 1 << 2),
(TestFlags::from_bits_retain(1 << 3), 1 << 3),
],
TestFlags::symmetric_difference,
TestFlags::toggle,
);
case(
TestFlags::A,
&[
(TestFlags::empty(), 1),
(TestFlags::A, 0),
(TestFlags::all(), 1 << 1 | 1 << 2),
],
TestFlags::symmetric_difference,
TestFlags::toggle,
);
case(
TestFlags::A | TestFlags::B | TestFlags::from_bits_retain(1 << 3),
&[
(TestFlags::ABC, 1 << 2 | 1 << 3),
(TestFlags::from_bits_retain(1 << 3), 1 | 1 << 1),
],
TestFlags::symmetric_difference,
TestFlags::toggle,
);
}
#[track_caller]
fn case<T: Flags + std::fmt::Debug + std::ops::BitXor<Output = T> + std::ops::BitXorAssign + Copy>(
value: T,
inputs: &[(T, T::Bits)],
mut inherent_sym_diff: impl FnMut(T, T) -> T,
mut inherent_toggle: impl FnMut(&mut T, T),
) where
T::Bits: std::fmt::Debug + PartialEq + Copy,
{
for (input, expected) in inputs {
assert_eq!(
*expected,
inherent_sym_diff(value, *input).bits(),
"{:?}.symmetric_difference({:?})",
value,
input
);
assert_eq!(
*expected,
Flags::symmetric_difference(value, *input).bits(),
"Flags::symmetric_difference({:?}, {:?})",
value,
input
);
assert_eq!(
*expected,
(value ^ *input).bits(),
"{:?} ^ {:?}",
value,
input
);
assert_eq!(
*expected,
{
let mut value = value;
value ^= *input;
value
}
.bits(),
"{:?} ^= {:?}",
value,
input,
);
assert_eq!(
*expected,
{
let mut value = value;
inherent_toggle(&mut value, *input);
value
}
.bits(),
"{:?}.toggle({:?})",
value,
input,
);
assert_eq!(
*expected,
{
let mut value = value;
Flags::toggle(&mut value, *input);
value
}
.bits(),
"{:?}.toggle({:?})",
value,
input,
);
}
}