Rollup merge of #101573 - lcnr:param-kind-ord, r=BoxyUwU

[rust.git] / library / core / tests / num / uint_macros.rs

diff --git a/library/core/tests/num/uint_macros.rs b/library/core/tests/num/uint_macros.rs
index 93ae620c23302413da250988dd8b0592d8c19d8a..15ae9f2324f6c8a29605576e793f9609571f42ab 100644 (file)
--- a/library/core/tests/num/uint_macros.rs
+++ b/library/core/tests/num/uint_macros.rs
@@ -230,6 +230,28 @@ fn test_checked_next_multiple_of() {
                 assert_eq!((1 as $T).checked_next_multiple_of(0), None);
                 assert_eq!(MAX.checked_next_multiple_of(2), None);
             }
+
+            #[test]
+            fn test_carrying_add() {
+                assert_eq!($T::MAX.carrying_add(1, false), (0, true));
+                assert_eq!($T::MAX.carrying_add(0, true), (0, true));
+                assert_eq!($T::MAX.carrying_add(1, true), (1, true));
+
+                assert_eq!($T::MIN.carrying_add($T::MAX, false), ($T::MAX, false));
+                assert_eq!($T::MIN.carrying_add(0, true), (1, false));
+                assert_eq!($T::MIN.carrying_add($T::MAX, true), (0, true));
+            }
+
+            #[test]
+            fn test_borrowing_sub() {
+                assert_eq!($T::MIN.borrowing_sub(1, false), ($T::MAX, true));
+                assert_eq!($T::MIN.borrowing_sub(0, true), ($T::MAX, true));
+                assert_eq!($T::MIN.borrowing_sub(1, true), ($T::MAX - 1, true));
+
+                assert_eq!($T::MAX.borrowing_sub($T::MAX, false), (0, false));
+                assert_eq!($T::MAX.borrowing_sub(0, true), ($T::MAX - 1, false));
+                assert_eq!($T::MAX.borrowing_sub($T::MAX, true), ($T::MAX, true));
+            }
         }
     };
 }