FEAT: Add ArrayVec.capacity_left

2018-07-17 14:46:53 +02:00
parent d84cb377a9
commit d11c853346
2 changed files with 27 additions and 0 deletions
@@ -27,6 +27,20 @@ fn test_simple() {
    assert_eq!(sum_len, 8);
 }

+#[test]
+fn test_capacity_left() {
+    let mut vec: ArrayVec<[usize; 4]> = ArrayVec::new();
+    assert_eq!(vec.capacity_left(), 4);
+    vec.push(1);
+    assert_eq!(vec.capacity_left(), 3);
+    vec.push(2);
+    assert_eq!(vec.capacity_left(), 2);
+    vec.push(3);
+    assert_eq!(vec.capacity_left(), 1);
+    vec.push(4);
+    assert_eq!(vec.capacity_left(), 0);
+}
+
 #[test]
 fn test_u16_index() {
    const N: usize = 4096;