1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/rust/tokio-timer/tests/interval.rs b/third_party/rust/tokio-timer/tests/interval.rs
new file mode 100644
index 0000000000..27828fc83a
--- /dev/null
+++ b/third_party/rust/tokio-timer/tests/interval.rs
@@ -0,0 +1,46 @@
+extern crate futures;
+extern crate tokio_executor;
+extern crate tokio_timer;
+
+#[macro_use]
+mod support;
+use support::*;
+
+use tokio_timer::*;
+
+use futures::Stream;
+
+#[test]
+#[should_panic]
+fn interval_zero_duration() {
+    mocked(|_, time| {
+        let _ = Interval::new(time.now(), ms(0));
+    });
+}
+
+#[test]
+fn usage() {
+    mocked(|timer, time| {
+        let start = time.now();
+        let mut int = Interval::new(start, ms(300));
+
+        assert_ready_eq!(int, Some(start));
+        assert_not_ready!(int);
+
+        advance(timer, ms(100));
+        assert_not_ready!(int);
+
+        advance(timer, ms(200));
+        assert_ready_eq!(int, Some(start + ms(300)));
+        assert_not_ready!(int);
+
+        advance(timer, ms(400));
+        assert_ready_eq!(int, Some(start + ms(600)));
+        assert_not_ready!(int);
+
+        advance(timer, ms(500));
+        assert_ready_eq!(int, Some(start + ms(900)));
+        assert_ready_eq!(int, Some(start + ms(1200)));
+        assert_not_ready!(int);
+    });
+}