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rust/library/core/tests/time.rs
Christiaan Dirkx 73e0a56dde Make all methods of Duration const 
Make the following methods of `Duration` unstable const under `duration_const_2`:
 - `from_secs_f64`
 - `from_secs_f32`
 - `mul_f64`
 - `mul_f32`
 - `div_f64`
 - `div_f32`

This results in all methods of `Duration` being (unstable) const.

Also adds tests for these methods in a const context, moved the test to `library` as part of #76268.

Possible because of #72449, which made the relevant `f32` and `f64` methods const.

Tracking issue: #72440
2020-09-12 15:14:58 +02:00

425 lines
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use core::time::Duration;
#[test]
fn creation() {
assert_ne!(Duration::from_secs(1), Duration::from_secs(0));
assert_eq!(Duration::from_secs(1) + Duration::from_secs(2), Duration::from_secs(3));
assert_eq!(
Duration::from_millis(10) + Duration::from_secs(4),
Duration::new(4, 10 * 1_000_000)
);
assert_eq!(Duration::from_millis(4000), Duration::new(4, 0));
}
#[test]
#[should_panic]
fn new_overflow() {
let _ = Duration::new(u64::MAX, 1_000_000_000);
}
#[test]
fn secs() {
assert_eq!(Duration::new(0, 0).as_secs(), 0);
assert_eq!(Duration::new(0, 500_000_005).as_secs(), 0);
assert_eq!(Duration::new(0, 1_050_000_001).as_secs(), 1);
assert_eq!(Duration::from_secs(1).as_secs(), 1);
assert_eq!(Duration::from_millis(999).as_secs(), 0);
assert_eq!(Duration::from_millis(1001).as_secs(), 1);
assert_eq!(Duration::from_micros(999_999).as_secs(), 0);
assert_eq!(Duration::from_micros(1_000_001).as_secs(), 1);
assert_eq!(Duration::from_nanos(999_999_999).as_secs(), 0);
assert_eq!(Duration::from_nanos(1_000_000_001).as_secs(), 1);
}
#[test]
fn millis() {
assert_eq!(Duration::new(0, 0).subsec_millis(), 0);
assert_eq!(Duration::new(0, 500_000_005).subsec_millis(), 500);
assert_eq!(Duration::new(0, 1_050_000_001).subsec_millis(), 50);
assert_eq!(Duration::from_secs(1).subsec_millis(), 0);
assert_eq!(Duration::from_millis(999).subsec_millis(), 999);
assert_eq!(Duration::from_millis(1001).subsec_millis(), 1);
assert_eq!(Duration::from_micros(999_999).subsec_millis(), 999);
assert_eq!(Duration::from_micros(1_001_000).subsec_millis(), 1);
assert_eq!(Duration::from_nanos(999_999_999).subsec_millis(), 999);
assert_eq!(Duration::from_nanos(1_001_000_000).subsec_millis(), 1);
}
#[test]
fn micros() {
assert_eq!(Duration::new(0, 0).subsec_micros(), 0);
assert_eq!(Duration::new(0, 500_000_005).subsec_micros(), 500_000);
assert_eq!(Duration::new(0, 1_050_000_001).subsec_micros(), 50_000);
assert_eq!(Duration::from_secs(1).subsec_micros(), 0);
assert_eq!(Duration::from_millis(999).subsec_micros(), 999_000);
assert_eq!(Duration::from_millis(1001).subsec_micros(), 1_000);
assert_eq!(Duration::from_micros(999_999).subsec_micros(), 999_999);
assert_eq!(Duration::from_micros(1_000_001).subsec_micros(), 1);
assert_eq!(Duration::from_nanos(999_999_999).subsec_micros(), 999_999);
assert_eq!(Duration::from_nanos(1_000_001_000).subsec_micros(), 1);
}
#[test]
fn nanos() {
assert_eq!(Duration::new(0, 0).subsec_nanos(), 0);
assert_eq!(Duration::new(0, 5).subsec_nanos(), 5);
assert_eq!(Duration::new(0, 1_000_000_001).subsec_nanos(), 1);
assert_eq!(Duration::from_secs(1).subsec_nanos(), 0);
assert_eq!(Duration::from_millis(999).subsec_nanos(), 999_000_000);
assert_eq!(Duration::from_millis(1001).subsec_nanos(), 1_000_000);
assert_eq!(Duration::from_micros(999_999).subsec_nanos(), 999_999_000);
assert_eq!(Duration::from_micros(1_000_001).subsec_nanos(), 1000);
assert_eq!(Duration::from_nanos(999_999_999).subsec_nanos(), 999_999_999);
assert_eq!(Duration::from_nanos(1_000_000_001).subsec_nanos(), 1);
}
#[test]
fn add() {
assert_eq!(Duration::new(0, 0) + Duration::new(0, 1), Duration::new(0, 1));
assert_eq!(Duration::new(0, 500_000_000) + Duration::new(0, 500_000_001), Duration::new(1, 1));
}
#[test]
fn checked_add() {
assert_eq!(Duration::new(0, 0).checked_add(Duration::new(0, 1)), Some(Duration::new(0, 1)));
assert_eq!(
Duration::new(0, 500_000_000).checked_add(Duration::new(0, 500_000_001)),
Some(Duration::new(1, 1))
);
assert_eq!(Duration::new(1, 0).checked_add(Duration::new(u64::MAX, 0)), None);
}
#[test]
fn saturating_add() {
assert_eq!(Duration::new(0, 0).saturating_add(Duration::new(0, 1)), Duration::new(0, 1));
assert_eq!(
Duration::new(0, 500_000_000).saturating_add(Duration::new(0, 500_000_001)),
Duration::new(1, 1)
);
assert_eq!(Duration::new(1, 0).saturating_add(Duration::new(u64::MAX, 0)), Duration::MAX);
}
#[test]
fn sub() {
assert_eq!(Duration::new(0, 1) - Duration::new(0, 0), Duration::new(0, 1));
assert_eq!(Duration::new(0, 500_000_001) - Duration::new(0, 500_000_000), Duration::new(0, 1));
assert_eq!(Duration::new(1, 0) - Duration::new(0, 1), Duration::new(0, 999_999_999));
}
#[test]
fn checked_sub() {
let zero = Duration::new(0, 0);
let one_nano = Duration::new(0, 1);
let one_sec = Duration::new(1, 0);
assert_eq!(one_nano.checked_sub(zero), Some(Duration::new(0, 1)));
assert_eq!(one_sec.checked_sub(one_nano), Some(Duration::new(0, 999_999_999)));
assert_eq!(zero.checked_sub(one_nano), None);
assert_eq!(zero.checked_sub(one_sec), None);
}
#[test]
fn saturating_sub() {
let zero = Duration::new(0, 0);
let one_nano = Duration::new(0, 1);
let one_sec = Duration::new(1, 0);
assert_eq!(one_nano.saturating_sub(zero), Duration::new(0, 1));
assert_eq!(one_sec.saturating_sub(one_nano), Duration::new(0, 999_999_999));
assert_eq!(zero.saturating_sub(one_nano), Duration::MIN);
assert_eq!(zero.saturating_sub(one_sec), Duration::MIN);
}
#[test]
#[should_panic]
fn sub_bad1() {
let _ = Duration::new(0, 0) - Duration::new(0, 1);
}
#[test]
#[should_panic]
fn sub_bad2() {
let _ = Duration::new(0, 0) - Duration::new(1, 0);
}
#[test]
fn mul() {
assert_eq!(Duration::new(0, 1) * 2, Duration::new(0, 2));
assert_eq!(Duration::new(1, 1) * 3, Duration::new(3, 3));
assert_eq!(Duration::new(0, 500_000_001) * 4, Duration::new(2, 4));
assert_eq!(Duration::new(0, 500_000_001) * 4000, Duration::new(2000, 4000));
}
#[test]
fn checked_mul() {
assert_eq!(Duration::new(0, 1).checked_mul(2), Some(Duration::new(0, 2)));
assert_eq!(Duration::new(1, 1).checked_mul(3), Some(Duration::new(3, 3)));
assert_eq!(Duration::new(0, 500_000_001).checked_mul(4), Some(Duration::new(2, 4)));
assert_eq!(Duration::new(0, 500_000_001).checked_mul(4000), Some(Duration::new(2000, 4000)));
assert_eq!(Duration::new(u64::MAX - 1, 0).checked_mul(2), None);
}
#[test]
fn saturating_mul() {
assert_eq!(Duration::new(0, 1).saturating_mul(2), Duration::new(0, 2));
assert_eq!(Duration::new(1, 1).saturating_mul(3), Duration::new(3, 3));
assert_eq!(Duration::new(0, 500_000_001).saturating_mul(4), Duration::new(2, 4));
assert_eq!(Duration::new(0, 500_000_001).saturating_mul(4000), Duration::new(2000, 4000));
assert_eq!(Duration::new(u64::MAX - 1, 0).saturating_mul(2), Duration::MAX);
}
#[test]
fn div() {
assert_eq!(Duration::new(0, 1) / 2, Duration::new(0, 0));
assert_eq!(Duration::new(1, 1) / 3, Duration::new(0, 333_333_333));
assert_eq!(Duration::new(99, 999_999_000) / 100, Duration::new(0, 999_999_990));
}
#[test]
fn checked_div() {
assert_eq!(Duration::new(2, 0).checked_div(2), Some(Duration::new(1, 0)));
assert_eq!(Duration::new(1, 0).checked_div(2), Some(Duration::new(0, 500_000_000)));
assert_eq!(Duration::new(2, 0).checked_div(0), None);
}
#[test]
fn correct_sum() {
let durations = [
Duration::new(1, 999_999_999),
Duration::new(2, 999_999_999),
Duration::new(0, 999_999_999),
Duration::new(0, 999_999_999),
Duration::new(0, 999_999_999),
Duration::new(5, 0),
];
let sum = durations.iter().sum::<Duration>();
assert_eq!(sum, Duration::new(1 + 2 + 5 + 4, 1_000_000_000 - 5));
}
#[test]
fn debug_formatting_extreme_values() {
assert_eq!(
format!("{:?}", Duration::new(18_446_744_073_709_551_615, 123_456_789)),
"18446744073709551615.123456789s"
);
}
#[test]
fn debug_formatting_secs() {
assert_eq!(format!("{:?}", Duration::new(7, 000_000_000)), "7s");
assert_eq!(format!("{:?}", Duration::new(7, 100_000_000)), "7.1s");
assert_eq!(format!("{:?}", Duration::new(7, 000_010_000)), "7.00001s");
assert_eq!(format!("{:?}", Duration::new(7, 000_000_001)), "7.000000001s");
assert_eq!(format!("{:?}", Duration::new(7, 123_456_789)), "7.123456789s");
assert_eq!(format!("{:?}", Duration::new(88, 000_000_000)), "88s");
assert_eq!(format!("{:?}", Duration::new(88, 100_000_000)), "88.1s");
assert_eq!(format!("{:?}", Duration::new(88, 000_010_000)), "88.00001s");
assert_eq!(format!("{:?}", Duration::new(88, 000_000_001)), "88.000000001s");
assert_eq!(format!("{:?}", Duration::new(88, 123_456_789)), "88.123456789s");
assert_eq!(format!("{:?}", Duration::new(999, 000_000_000)), "999s");
assert_eq!(format!("{:?}", Duration::new(999, 100_000_000)), "999.1s");
assert_eq!(format!("{:?}", Duration::new(999, 000_010_000)), "999.00001s");
assert_eq!(format!("{:?}", Duration::new(999, 000_000_001)), "999.000000001s");
assert_eq!(format!("{:?}", Duration::new(999, 123_456_789)), "999.123456789s");
}
#[test]
fn debug_formatting_millis() {
assert_eq!(format!("{:?}", Duration::new(0, 7_000_000)), "7ms");
assert_eq!(format!("{:?}", Duration::new(0, 7_100_000)), "7.1ms");
assert_eq!(format!("{:?}", Duration::new(0, 7_000_001)), "7.000001ms");
assert_eq!(format!("{:?}", Duration::new(0, 7_123_456)), "7.123456ms");
assert_eq!(format!("{:?}", Duration::new(0, 88_000_000)), "88ms");
assert_eq!(format!("{:?}", Duration::new(0, 88_100_000)), "88.1ms");
assert_eq!(format!("{:?}", Duration::new(0, 88_000_001)), "88.000001ms");
assert_eq!(format!("{:?}", Duration::new(0, 88_123_456)), "88.123456ms");
assert_eq!(format!("{:?}", Duration::new(0, 999_000_000)), "999ms");
assert_eq!(format!("{:?}", Duration::new(0, 999_100_000)), "999.1ms");
assert_eq!(format!("{:?}", Duration::new(0, 999_000_001)), "999.000001ms");
assert_eq!(format!("{:?}", Duration::new(0, 999_123_456)), "999.123456ms");
}
#[test]
fn debug_formatting_micros() {
assert_eq!(format!("{:?}", Duration::new(0, 7_000)), "7µs");
assert_eq!(format!("{:?}", Duration::new(0, 7_100)), "7.1µs");
assert_eq!(format!("{:?}", Duration::new(0, 7_001)), "7.001µs");
assert_eq!(format!("{:?}", Duration::new(0, 7_123)), "7.123µs");
assert_eq!(format!("{:?}", Duration::new(0, 88_000)), "88µs");
assert_eq!(format!("{:?}", Duration::new(0, 88_100)), "88.1µs");
assert_eq!(format!("{:?}", Duration::new(0, 88_001)), "88.001µs");
assert_eq!(format!("{:?}", Duration::new(0, 88_123)), "88.123µs");
assert_eq!(format!("{:?}", Duration::new(0, 999_000)), "999µs");
assert_eq!(format!("{:?}", Duration::new(0, 999_100)), "999.1µs");
assert_eq!(format!("{:?}", Duration::new(0, 999_001)), "999.001µs");
assert_eq!(format!("{:?}", Duration::new(0, 999_123)), "999.123µs");
}
#[test]
fn debug_formatting_nanos() {
assert_eq!(format!("{:?}", Duration::new(0, 0)), "0ns");
assert_eq!(format!("{:?}", Duration::new(0, 1)), "1ns");
assert_eq!(format!("{:?}", Duration::new(0, 88)), "88ns");
assert_eq!(format!("{:?}", Duration::new(0, 999)), "999ns");
}
#[test]
fn debug_formatting_precision_zero() {
assert_eq!(format!("{:.0?}", Duration::new(0, 0)), "0ns");
assert_eq!(format!("{:.0?}", Duration::new(0, 123)), "123ns");
assert_eq!(format!("{:.0?}", Duration::new(0, 1_001)), "1µs");
assert_eq!(format!("{:.0?}", Duration::new(0, 1_499)), "1µs");
assert_eq!(format!("{:.0?}", Duration::new(0, 1_500)), "2µs");
assert_eq!(format!("{:.0?}", Duration::new(0, 1_999)), "2µs");
assert_eq!(format!("{:.0?}", Duration::new(0, 1_000_001)), "1ms");
assert_eq!(format!("{:.0?}", Duration::new(0, 1_499_999)), "1ms");
assert_eq!(format!("{:.0?}", Duration::new(0, 1_500_000)), "2ms");
assert_eq!(format!("{:.0?}", Duration::new(0, 1_999_999)), "2ms");
assert_eq!(format!("{:.0?}", Duration::new(1, 000_000_001)), "1s");
assert_eq!(format!("{:.0?}", Duration::new(1, 499_999_999)), "1s");
assert_eq!(format!("{:.0?}", Duration::new(1, 500_000_000)), "2s");
assert_eq!(format!("{:.0?}", Duration::new(1, 999_999_999)), "2s");
}
#[test]
fn debug_formatting_precision_two() {
assert_eq!(format!("{:.2?}", Duration::new(0, 0)), "0.00ns");
assert_eq!(format!("{:.2?}", Duration::new(0, 123)), "123.00ns");
assert_eq!(format!("{:.2?}", Duration::new(0, 1_000)), "1.00µs");
assert_eq!(format!("{:.2?}", Duration::new(0, 7_001)), "7.00µs");
assert_eq!(format!("{:.2?}", Duration::new(0, 7_100)), "7.10µs");
assert_eq!(format!("{:.2?}", Duration::new(0, 7_109)), "7.11µs");
assert_eq!(format!("{:.2?}", Duration::new(0, 7_199)), "7.20µs");
assert_eq!(format!("{:.2?}", Duration::new(0, 1_999)), "2.00µs");
assert_eq!(format!("{:.2?}", Duration::new(0, 1_000_000)), "1.00ms");
assert_eq!(format!("{:.2?}", Duration::new(0, 3_001_000)), "3.00ms");
assert_eq!(format!("{:.2?}", Duration::new(0, 3_100_000)), "3.10ms");
assert_eq!(format!("{:.2?}", Duration::new(0, 1_999_999)), "2.00ms");
assert_eq!(format!("{:.2?}", Duration::new(1, 000_000_000)), "1.00s");
assert_eq!(format!("{:.2?}", Duration::new(4, 001_000_000)), "4.00s");
assert_eq!(format!("{:.2?}", Duration::new(2, 100_000_000)), "2.10s");
assert_eq!(format!("{:.2?}", Duration::new(2, 104_990_000)), "2.10s");
assert_eq!(format!("{:.2?}", Duration::new(2, 105_000_000)), "2.11s");
assert_eq!(format!("{:.2?}", Duration::new(8, 999_999_999)), "9.00s");
}
#[test]
fn debug_formatting_precision_high() {
assert_eq!(format!("{:.5?}", Duration::new(0, 23_678)), "23.67800µs");
assert_eq!(format!("{:.9?}", Duration::new(1, 000_000_000)), "1.000000000s");
assert_eq!(format!("{:.10?}", Duration::new(4, 001_000_000)), "4.0010000000s");
assert_eq!(format!("{:.20?}", Duration::new(4, 001_000_000)), "4.00100000000000000000s");
}
#[test]
fn duration_const() {
// test that the methods of `Duration` are usable in a const context
const DURATION: Duration = Duration::new(0, 123_456_789);
const SUB_SEC_MILLIS: u32 = DURATION.subsec_millis();
assert_eq!(SUB_SEC_MILLIS, 123);
const SUB_SEC_MICROS: u32 = DURATION.subsec_micros();
assert_eq!(SUB_SEC_MICROS, 123_456);
const SUB_SEC_NANOS: u32 = DURATION.subsec_nanos();
assert_eq!(SUB_SEC_NANOS, 123_456_789);
const ZERO: Duration = Duration::zero();
assert_eq!(ZERO, Duration::new(0, 0));
const IS_ZERO: bool = ZERO.is_zero();
assert!(IS_ZERO);
const ONE: Duration = Duration::new(1, 0);
const SECONDS: u64 = ONE.as_secs();
assert_eq!(SECONDS, 1);
const FROM_SECONDS: Duration = Duration::from_secs(1);
assert_eq!(FROM_SECONDS, ONE);
const SECONDS_F32: f32 = ONE.as_secs_f32();
assert_eq!(SECONDS_F32, 1.0);
const FROM_SECONDS_F32: Duration = Duration::from_secs_f32(1.0);
assert_eq!(FROM_SECONDS_F32, ONE);
const SECONDS_F64: f64 = ONE.as_secs_f64();
assert_eq!(SECONDS_F64, 1.0);
const FROM_SECONDS_F64: Duration = Duration::from_secs_f64(1.0);
assert_eq!(FROM_SECONDS_F64, ONE);
const MILLIS: u128 = ONE.as_millis();
assert_eq!(MILLIS, 1_000);
const FROM_MILLIS: Duration = Duration::from_millis(1_000);
assert_eq!(FROM_MILLIS, ONE);
const MICROS: u128 = ONE.as_micros();
assert_eq!(MICROS, 1_000_000);
const FROM_MICROS: Duration = Duration::from_micros(1_000_000);
assert_eq!(FROM_MICROS, ONE);
const NANOS: u128 = ONE.as_nanos();
assert_eq!(NANOS, 1_000_000_000);
const FROM_NANOS: Duration = Duration::from_nanos(1_000_000_000);
assert_eq!(FROM_NANOS, ONE);
const MAX: Duration = Duration::new(u64::MAX, 999_999_999);
const CHECKED_ADD: Option<Duration> = MAX.checked_add(ONE);
assert_eq!(CHECKED_ADD, None);
const CHECKED_SUB: Option<Duration> = ZERO.checked_sub(ONE);
assert_eq!(CHECKED_SUB, None);
const CHECKED_MUL: Option<Duration> = ONE.checked_mul(1);
assert_eq!(CHECKED_MUL, Some(ONE));
const MUL_F32: Duration = ONE.mul_f32(1.0);
assert_eq!(MUL_F32, ONE);
const MUL_F64: Duration = ONE.mul_f64(1.0);
assert_eq!(MUL_F64, ONE);
const CHECKED_DIV: Option<Duration> = ONE.checked_div(1);
assert_eq!(CHECKED_DIV, Some(ONE));
const DIV_F32: Duration = ONE.div_f32(1.0);
assert_eq!(DIV_F32, ONE);
const DIV_F64: Duration = ONE.div_f64(1.0);
assert_eq!(DIV_F64, ONE);
const DIV_DURATION_F32: f32 = ONE.div_duration_f32(ONE);
assert_eq!(DIV_DURATION_F32, 1.0);
const DIV_DURATION_F64: f64 = ONE.div_duration_f64(ONE);
assert_eq!(DIV_DURATION_F64, 1.0);
const SATURATING_ADD: Duration = MAX.saturating_add(ONE);
assert_eq!(SATURATING_ADD, MAX);
const SATURATING_SUB: Duration = ZERO.saturating_sub(ONE);
assert_eq!(SATURATING_SUB, ZERO);
const SATURATING_MUL: Duration = MAX.saturating_mul(2);
assert_eq!(SATURATING_MUL, MAX);
}
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