std: Clarify what timers do with zero and negative durations

Add tests. Also fix a bunch of broken time tests.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/libstd/task.rs b/src/libstd/task.rs
index 96036b54e36..9cace9c80ef 100644
--- a/src/libstd/task.rs
+++ b/src/libstd/task.rs
@@ -664,10 +664,11 @@ mod test {
 #[test]
 fn task_abort_no_kill_runtime() {
     use std::io::timer;
+    use time::Duration;
     use mem;
 
     let tb = TaskBuilder::new();
     let rx = tb.try_future(proc() {});
     mem::drop(rx);
-    timer::sleep_ms(1000);
+    timer::sleep(Duration::milliseconds(1000));
 }