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add tests for div_duration_* functions

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This commit is contained in:
Jacob Kiesel 2023-01-07 11:05:33 -07:00
parent a2112fcb0a
commit 9fd744b3e3
1 changed files with 26 additions and 0 deletions
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26
library/core/tests/time.rs
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@ -173,6 +173,32 @@ fn div() {
assert_eq!(Duration::new(99, 999_999_000) / 100, Duration::new(0, 999_999_990));
}
#[test]
fn div_duration_f32() {
assert_eq!(Duration::ZERO.div_duration_f32(Duration::MAX), 0.0);
assert_eq!(Duration::MAX.div_duration_f32(Duration::ZERO), f32::INFINITY);
assert_eq!((Duration::SECOND * 2).div_duration_f32(Duration::SECOND), 2.0);
assert!(Duration::ZERO.div_duration_f32(Duration::ZERO).is_nan());
// These tests demonstrate it doesn't panic with extreme values.
// Accuracy of the computed value is not a huge concern, we know floats don't work well
// at these extremes.
assert!((Duration::MAX).div_duration_f32(Duration::NANOSECOND) > 10.0f32.powf(28.0));
assert!((Duration::NANOSECOND).div_duration_f32(Duration::MAX) < 0.1);
}
#[test]
fn div_duration_f64() {
assert_eq!(Duration::ZERO.div_duration_f64(Duration::MAX), 0.0);
assert_eq!(Duration::MAX.div_duration_f64(Duration::ZERO), f64::INFINITY);
assert_eq!((Duration::SECOND * 2).div_duration_f64(Duration::SECOND), 2.0);
assert!(Duration::ZERO.div_duration_f64(Duration::ZERO).is_nan());
// These tests demonstrate it doesn't panic with extreme values.
// Accuracy of the computed value is not a huge concern, we know floats don't work well
// at these extremes.
assert!((Duration::MAX).div_duration_f64(Duration::NANOSECOND) > 10.0f64.powf(28.0));
assert!((Duration::NANOSECOND).div_duration_f64(Duration::MAX) < 0.1);
}
#[test]
fn checked_div() {
assert_eq!(Duration::new(2, 0).checked_div(2), Some(Duration::new(1, 0)));