Extra test

rust-lang · Mar 5, 2024 · d92c600 · d92c600
1 parent 50a8fd4
commit d92c600
Showing 1 changed file with 20 additions and 0 deletions.
diff --git a/library/core/tests/mem.rs b/library/core/tests/mem.rs
@@ -451,6 +451,26 @@ fn uninit_fill_from_partial() {
     assert_eq!(remainder.len(), 16);
 }
 
+#[test]
+fn uninit_over_fill() {
+    let mut dst = [MaybeUninit::new(255); 64];
+    let src = [0; 72];
+
+    let (initted, remainder) = MaybeUninit::fill_from(&mut dst, src.into_iter());
+    assert_eq!(initted, &src[0..64]);
+    assert_eq!(remainder.len(), 0);
+}
+
+#[test]
+fn uninit_empty_fill() {
+    let mut dst = [MaybeUninit::new(255); 64];
+    let src = [0; 0];
+
+    let (initted, remainder) = MaybeUninit::fill_from(&mut dst, src.into_iter());
+    assert_eq!(initted, &src[0..0]);
+    assert_eq!(remainder.len(), 64);
+}
+
 #[test]
 #[cfg(panic = "unwind")]
 fn uninit_fill_from_mid_panic() {