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6e55f0c6e3
Add a new crate `deltachat_time` with a fake `struct SystemTimeTools` for mocking `SystemTime::now()` for test purposes. One still needs to use `std::time::SystemTime` as a struct representing a system time. I think such a minimalistic approach is ok -- even if somebody uses the original `SystemTime::now()` instead of the mock by mistake, that could break only tests but not the program itself. The worst thing that can happen is that tests using `SystemTime::shift()` and checking messages timestamps f.e. wouldn't catch the corresponding bugs, but now we don't have such tests at all which is much worse.
36 lines
936 B
Rust
36 lines
936 B
Rust
#![allow(missing_docs)]
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use std::sync::RwLock;
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use std::time::{Duration, SystemTime};
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static SYSTEM_TIME_SHIFT: RwLock<Duration> = RwLock::new(Duration::new(0, 0));
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/// Fake struct for mocking `SystemTime::now()` for test purposes. You still need to use
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/// `SystemTime` as a struct representing a system time.
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pub struct SystemTimeTools();
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impl SystemTimeTools {
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pub const UNIX_EPOCH: SystemTime = SystemTime::UNIX_EPOCH;
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pub fn now() -> SystemTime {
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return SystemTime::now() + *SYSTEM_TIME_SHIFT.read().unwrap();
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}
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/// Simulates a system clock forward adjustment by `duration`.
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pub fn shift(duration: Duration) {
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*SYSTEM_TIME_SHIFT.write().unwrap() += duration;
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn it_works() {
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SystemTimeTools::shift(Duration::from_secs(60));
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let t = SystemTimeTools::now();
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assert!(t > SystemTime::now());
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}
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}
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