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pl030: Add simple tests

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This CL justs adds two very simple tests to improve overall test coverage.

Not sure what the best practices would be for mocking out the system
time, so I have skipped that functionality for now.

BUG=b:171750410
TEST=No change in functionality, just an added test.

Change-Id: I7a4e99c9d11203c5569ff28d2a5477bf8fd1b3a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2500948
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dennis Kempin <denniskempin@google.com>
This commit is contained in:
Dennis Kempin 2020-10-26 18:02:11 -07:00 committed by Commit Bot
parent 0c47e9441e
commit 336a9ef925
1 changed files with 32 additions and 0 deletions
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32
devices/src/pl030.rs
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@ -143,3 +143,35 @@ impl BusDevice for Pl030 {
data[3] = (reg_content >> 24) as u8;
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_interrupt_status_register() {
let event = Event::new().unwrap();
let mut device = Pl030::new(event.try_clone().unwrap());
let mut register = [0, 0, 0, 0];
// set interrupt
device.write(RTCEOI, &[1, 0, 0, 0]);
device.read(RTCSTAT, &mut register);
assert_eq!(register, [1, 0, 0, 0]);
assert_eq!(event.read().unwrap(), 1);
// clear interrupt
device.write(RTCEOI, &[0, 0, 0, 0]);
device.read(RTCSTAT, &mut register);
assert_eq!(register, [0, 0, 0, 0]);
}
#[test]
fn test_match_register() {
let mut device = Pl030::new(Event::new().unwrap());
let mut register = [0, 0, 0, 0];
device.write(RTCMR, &[1, 2, 3, 4]);
device.read(RTCMR, &mut register);
assert_eq!(register, [4, 3, 2, 1]);
}
}