1 use super::*;
2
3 use crate::Flags;
4
5 #[test]
cases()6 fn cases() {
7 case(
8 TestFlags::A | TestFlags::B,
9 &[
10 (TestFlags::A, 1 << 1),
11 (TestFlags::B, 1),
12 (TestFlags::from_bits_retain(1 << 3), 1 | 1 << 1),
13 ],
14 TestFlags::difference,
15 );
16
17 case(
18 TestFlags::from_bits_retain(1 | 1 << 3),
19 &[
20 (TestFlags::A, 1 << 3),
21 (TestFlags::from_bits_retain(1 << 3), 1),
22 ],
23 TestFlags::difference,
24 );
25
26 case(
27 TestExternal::from_bits_retain(!0),
28 &[(TestExternal::A, 0b1111_1110)],
29 TestExternal::difference,
30 );
31
32 assert_eq!(
33 0b1111_1110,
34 (TestExternal::from_bits_retain(!0) & !TestExternal::A).bits()
35 );
36
37 assert_eq!(
38 0b1111_1110,
39 (TestFlags::from_bits_retain(!0).difference(TestFlags::A)).bits()
40 );
41
42 // The `!` operator unsets bits that don't correspond to known flags
43 assert_eq!(
44 1 << 1 | 1 << 2,
45 (TestFlags::from_bits_retain(!0) & !TestFlags::A).bits()
46 );
47 }
48
49 #[track_caller]
case<T: Flags + std::fmt::Debug + std::ops::Sub<Output = T> + std::ops::SubAssign + Copy>( value: T, inputs: &[(T, T::Bits)], mut inherent: impl FnMut(T, T) -> T, ) where T::Bits: std::fmt::Debug + PartialEq + Copy,50 fn case<T: Flags + std::fmt::Debug + std::ops::Sub<Output = T> + std::ops::SubAssign + Copy>(
51 value: T,
52 inputs: &[(T, T::Bits)],
53 mut inherent: impl FnMut(T, T) -> T,
54 ) where
55 T::Bits: std::fmt::Debug + PartialEq + Copy,
56 {
57 for (input, expected) in inputs {
58 assert_eq!(
59 *expected,
60 inherent(value, *input).bits(),
61 "{:?}.difference({:?})",
62 value,
63 input
64 );
65 assert_eq!(
66 *expected,
67 Flags::difference(value, *input).bits(),
68 "Flags::difference({:?}, {:?})",
69 value,
70 input
71 );
72 assert_eq!(
73 *expected,
74 (value - *input).bits(),
75 "{:?} - {:?}",
76 value,
77 input
78 );
79 assert_eq!(
80 *expected,
81 {
82 let mut value = value;
83 value -= *input;
84 value
85 }
86 .bits(),
87 "{:?} -= {:?}",
88 value,
89 input,
90 );
91 }
92 }
93