Add smoke test

Author: willglynn

tests/smoke.rs

@@ -0,0 +1,17 @@
+extern crate rudy;
+
+#[test]
+fn smoke_test() {
+    use rudy::rudymap::RudyMap;
+
+    let mut map: RudyMap<u32, u32> = RudyMap::new();
+    let n = 10_000;
+
+    for i in 0..n {
+        assert!(map.insert(i, i).is_none());
+    }
+
+    for i in 0..n {
+        assert_eq!(map.remove(i), Some(i));
+    }
+}