add sleep_until test

Author: dvdsk

src/tools/miri/tests/pass/shims/time.rs

@@ -1,4 +1,5 @@
 //@compile-flags: -Zmiri-disable-isolation
+#![feature(thread_sleep_until)]
 
 use std::time::{Duration, Instant, SystemTime};
 
@@ -15,6 +16,14 @@ fn test_sleep() {
     assert!((after - before).as_millis() >= 100);
 }
 
+fn test_sleep_until() {
+    let before = Instant::now();
+    let one_second_from_now = before + Duration::from_millis(100);
+    std::thread::sleep_until(one_second_from_now);
+    let after = Instant::now();
+    assert!((after - before).as_millis() >= 100);
+}
+
 fn main() {
     // Check `SystemTime`.
     let now1 = SystemTime::now();
@@ -49,4 +58,5 @@ fn main() {
     duration_sanity(diff);
 
     test_sleep();
+    test_sleep_until();
 }