1 files changed, 66 insertions, 0 deletions
diff --git a/tests/atomic_cell.rs b/tests/atomic_cell.rs
index 28208ee..da7a6e1 100644
--- a/tests/atomic_cell.rs
+++ b/tests/atomic_cell.rs
@@ -264,3 +264,69 @@ fn const_atomic_cell_new() {
     CELL.store(1);
     assert_eq!(CELL.load(), 1);
 }
+
+// https://github.com/crossbeam-rs/crossbeam/pull/767
+macro_rules! test_arithmetic {
+    ($test_name:ident, $ty:ident) => {
+        #[test]
+        fn $test_name() {
+            let a: AtomicCell<$ty> = AtomicCell::new(7);
+
+            assert_eq!(a.fetch_add(3), 7);
+            assert_eq!(a.load(), 10);
+
+            assert_eq!(a.fetch_sub(3), 10);
+            assert_eq!(a.load(), 7);
+
+            assert_eq!(a.fetch_and(3), 7);
+            assert_eq!(a.load(), 3);
+
+            assert_eq!(a.fetch_or(16), 3);
+            assert_eq!(a.load(), 19);
+
+            assert_eq!(a.fetch_xor(2), 19);
+            assert_eq!(a.load(), 17);
+
+            assert_eq!(a.fetch_max(18), 17);
+            assert_eq!(a.load(), 18);
+
+            assert_eq!(a.fetch_min(17), 18);
+            assert_eq!(a.load(), 17);
+
+            assert_eq!(a.fetch_nand(7), 17);
+            assert_eq!(a.load(), !(17 & 7));
+        }
+    };
+}
+test_arithmetic!(arithmetic_u8, u8);
+test_arithmetic!(arithmetic_i8, i8);
+test_arithmetic!(arithmetic_u16, u16);
+test_arithmetic!(arithmetic_i16, i16);
+test_arithmetic!(arithmetic_u32, u32);
+test_arithmetic!(arithmetic_i32, i32);
+test_arithmetic!(arithmetic_u64, u64);
+test_arithmetic!(arithmetic_i64, i64);
+test_arithmetic!(arithmetic_u128, u128);
+test_arithmetic!(arithmetic_i128, i128);
+
+// https://github.com/crossbeam-rs/crossbeam/issues/748
+#[cfg_attr(miri, ignore)] // TODO
+#[rustversion::since(1.37)] // #[repr(align(N))] requires Rust 1.37
+#[test]
+fn issue_748() {
+    #[allow(dead_code)]
+    #[repr(align(8))]
+    #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+    enum Test {
+        Field(u32),
+        FieldLess,
+    }
+
+    assert_eq!(mem::size_of::<Test>(), 8);
+    assert_eq!(
+        AtomicCell::<Test>::is_lock_free(),
+        cfg!(not(crossbeam_no_atomic_64))
+    );
+    let x = AtomicCell::new(Test::FieldLess);
+    assert_eq!(x.load(), Test::FieldLess);
+}