Add tests for AsRef, AsMut, Borrow, BorrowMut, From and ExactSizeIterator

Author: Marwes

lib.rs

@@ -935,4 +935,69 @@ pub mod tests {
             assert_eq!(a.hash(&mut hasher), b.hash(&mut hasher));
         }
     }
+
+    #[test]
+    fn test_as_ref() {
+        let mut a: SmallVec<[u32; 2]> = SmallVec::new();
+        a.push(1);
+        assert_eq!(a.as_ref(), [1]);
+        a.push(2);
+        assert_eq!(a.as_ref(), [1, 2]);
+        a.push(3);
+        assert_eq!(a.as_ref(), [1, 2, 3]);
+    }
+
+    #[test]
+    fn test_as_mut() {
+        let mut a: SmallVec<[u32; 2]> = SmallVec::new();
+        a.push(1);
+        assert_eq!(a.as_mut(), [1]);
+        a.push(2);
+        assert_eq!(a.as_mut(), [1, 2]);
+        a.push(3);
+        assert_eq!(a.as_mut(), [1, 2, 3]);
+        a.as_mut()[1] = 4;
+        assert_eq!(a.as_mut(), [1, 4, 3]);
+    }
+
+    #[test]
+    fn test_borrow() {
+        use std::borrow::Borrow;
+
+        let mut a: SmallVec<[u32; 2]> = SmallVec::new();
+        a.push(1);
+        assert_eq!(a.borrow(), [1]);
+        a.push(2);
+        assert_eq!(a.borrow(), [1, 2]);
+        a.push(3);
+        assert_eq!(a.borrow(), [1, 2, 3]);
+    }
+
+    #[test]
+    fn test_borrow_mut() {
+        use std::borrow::BorrowMut;
+
+        let mut a: SmallVec<[u32; 2]> = SmallVec::new();
+        a.push(1);
+        assert_eq!(a.borrow_mut(), [1]);
+        a.push(2);
+        assert_eq!(a.borrow_mut(), [1, 2]);
+        a.push(3);
+        assert_eq!(a.borrow_mut(), [1, 2, 3]);
+        BorrowMut::<[u32]>::borrow_mut(&mut a)[1] = 4;
+        assert_eq!(a.borrow_mut(), [1, 4, 3]);
+    }
+
+    #[test]
+    fn test_from() {
+        assert_eq!(&SmallVec::<[u32; 2]>::from(&[1][..])[..], [1]);
+        assert_eq!(&SmallVec::<[u32; 2]>::from(&[1, 2, 3][..])[..], [1, 2, 3]);
+    }
+
+    #[test]
+    fn test_exact_size_iterator() {
+        let mut vec = SmallVec::<[u32; 2]>::from(&[1, 2, 3][..]);
+        assert_eq!(vec.clone().into_iter().len(), 3);
+        assert_eq!(vec.drain().len(), 3);
+    }
 }