Implement tokio_core::reactor::Interval

tests/interval.rs

@@ -0,0 +1,38 @@
+extern crate env_logger;
+extern crate futures;
+extern crate tokio_core;
+
+use std::time::{Instant, Duration};
+
+use futures::stream::{Stream};
+use tokio_core::reactor::{Core, Interval};
+
+macro_rules! t {
+    ($e:expr) => (match $e {
+        Ok(e) => e,
+        Err(e) => panic!("{} failed with {:?}", stringify!($e), e),
+    })
+}
+
+#[test]
+fn single() {
+    drop(env_logger::init());
+    let mut l = t!(Core::new());
+    let dur = Duration::from_millis(10);
+    let interval = t!(Interval::new(dur, &l.handle()));
+    let start = Instant::now();
+    t!(l.run(interval.take(1).collect()));
+    assert!(start.elapsed() >= dur);
+}
+
+#[test]
+fn two_times() {
+    drop(env_logger::init());
+    let mut l = t!(Core::new());
+    let dur = Duration::from_millis(10);
+    let interval = t!(Interval::new(dur, &l.handle()));
+    let start = Instant::now();
+    let result = t!(l.run(interval.take(2).collect()));
+    assert!(start.elapsed() >= dur*2);
+    assert_eq!(result, vec![(), ()]);
+}