1 files changed, 45 insertions, 0 deletions
diff --git a/vendor/rustix/tests/time/monotonic.rs b/vendor/rustix/tests/time/monotonic.rs
new file mode 100644
index 000000000..89470f2b4
--- /dev/null
+++ b/vendor/rustix/tests/time/monotonic.rs
@@ -0,0 +1,45 @@
+#[cfg(feature = "thread")]
+use rustix::thread::nanosleep;
+use rustix::time::{clock_gettime, ClockId, Timespec};
+
+/// Attempt to test that the monotonic clock is monotonic. Time may or may not
+/// advance, but it shouldn't regress.
+#[test]
+fn test_monotonic_clock() {
+    let a = clock_gettime(ClockId::Monotonic);
+    let b = clock_gettime(ClockId::Monotonic);
+    if b.tv_sec == a.tv_sec {
+        assert!(b.tv_nsec >= a.tv_nsec);
+    } else {
+        assert!(b.tv_sec > a.tv_sec);
+    }
+}
+
+/// With the "thread" feature, we can sleep so that we're guaranteed that time
+/// has advanced.
+#[cfg(feature = "thread")]
+#[test]
+fn test_monotonic_clock_with_sleep_1s() {
+    let a = clock_gettime(ClockId::Monotonic);
+    let _rem = nanosleep(&Timespec {
+        tv_sec: 1,
+        tv_nsec: 0,
+    });
+    let b = clock_gettime(ClockId::Monotonic);
+    assert!(b.tv_sec > a.tv_sec);
+}
+
+/// With the "thread" feature, we can sleep so that we're guaranteed that time
+/// has advanced.
+#[cfg(feature = "thread")]
+#[test]
+fn test_monotonic_clock_with_sleep_1ms() {
+    let a = clock_gettime(ClockId::Monotonic);
+    let _rem = nanosleep(&Timespec {
+        tv_sec: 0,
+        tv_nsec: 1_000_000,
+    });
+    let b = clock_gettime(ClockId::Monotonic);
+    assert!(b.tv_sec >= a.tv_sec);
+    assert!(b.tv_sec != a.tv_sec || b.tv_nsec > a.tv_nsec);
+}