crosvm/bit_field/tests/test_enum.rs
Stephen Barber d6945a09b8 crosvm: add license blurb to all files
A few files were missing license blurbs at the top, so update them all
to include them.

BUG=none
TEST=none

Change-Id: Ida101be2e5c255b8cffeb15f5b93f63bfd1b130b
Reviewed-on: https://chromium-review.googlesource.com/1577900
Commit-Ready: Stephen Barber <smbarber@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
2019-04-24 15:51:38 -07:00

53 lines
1.1 KiB
Rust

// Copyright 2019 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
use bit_field::*;
#[bitfield]
#[derive(Debug, PartialEq)]
enum TwoBits {
Zero = 0b00,
One = 0b01,
Two = 0b10,
Three = 0b11,
}
#[bitfield]
#[bits = 3]
#[derive(Debug, PartialEq)]
enum ThreeBits {
Zero = 0b00,
One = 0b01,
Two = 0b10,
Three = 0b111,
}
#[bitfield]
struct Struct {
prefix: BitField1,
two_bits: TwoBits,
three_bits: ThreeBits,
suffix: BitField2,
}
#[test]
fn test_enum() {
let mut s = Struct::new();
assert_eq!(s.get(0, 8), 0b_0000_0000);
assert_eq!(s.get_two_bits(), TwoBits::Zero);
s.set_two_bits(TwoBits::Three);
assert_eq!(s.get(0, 8), 0b_0000_0110);
assert_eq!(s.get_two_bits(), TwoBits::Three);
s.set(0, 8, 0b_1010_1010);
// ^^ TwoBits
// ^^_^ Three Bits.
assert_eq!(s.get_two_bits(), TwoBits::One);
assert_eq!(s.get_three_bits().unwrap_err().raw_val(), 0b101);
s.set_three_bits(ThreeBits::Two);
assert_eq!(s.get(0, 8), 0b_1001_0010);
}