From 3d14bbc4aed661e4ed45047b9ff51ed0bb352ad0 Mon Sep 17 00:00:00 2001
From: logaritmisk <anders.e.olsson@gmail.com>
Date: Thu, 4 Jan 2018 10:32:49 +0100
Subject: [PATCH] Simple test for extend_from_bitset.

---
 src/lib.rs | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index e6c2dc4..8609b6b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,7 +2,7 @@ use std::ops;
 use std::iter::FromIterator;
 use std::default::Default;
 use std::hash::{BuildHasherDefault, Hasher};
-use std::collections::{HashMap, HashSet};
+use std::collections::HashMap;
 
 const BITS: u64 = 64;
 
@@ -274,4 +274,20 @@ mod tests {
         assert_eq!(set.contains(4), true);
         assert_eq!(set.contains(5), true);
     }
+
+    #[test]
+    fn extend_from_bitset() {
+        let mut set = [1, 2, 3].iter().cloned().collect::<BitSet>();
+        let other = [3, 4, 5].iter().cloned().collect::<BitSet>();
+
+        set.extend_from_bitset(&other);
+
+        assert_eq!(set.len(), 5);
+
+        assert_eq!(set.contains(1), true);
+        assert_eq!(set.contains(2), true);
+        assert_eq!(set.contains(3), true);
+        assert_eq!(set.contains(4), true);
+        assert_eq!(set.contains(5), true);
+    }
 }