1 files changed, 112 insertions, 0 deletions
diff --git a/third_party/rust/crossbeam-utils-0.6.6/tests/cache_padded.rs b/third_party/rust/crossbeam-utils-0.6.6/tests/cache_padded.rs
new file mode 100644
index 0000000000..8ad7d40a4e
--- /dev/null
+++ b/third_party/rust/crossbeam-utils-0.6.6/tests/cache_padded.rs
@@ -0,0 +1,112 @@
+extern crate crossbeam_utils;
+
+use std::cell::Cell;
+use std::mem;
+
+use crossbeam_utils::CachePadded;
+
+#[test]
+fn default() {
+    let x: CachePadded<u64> = Default::default();
+    assert_eq!(*x, 0);
+}
+
+#[test]
+fn store_u64() {
+    let x: CachePadded<u64> = CachePadded::new(17);
+    assert_eq!(*x, 17);
+}
+
+#[test]
+fn store_pair() {
+    let x: CachePadded<(u64, u64)> = CachePadded::new((17, 37));
+    assert_eq!(x.0, 17);
+    assert_eq!(x.1, 37);
+}
+
+#[test]
+fn distance() {
+    let arr = [CachePadded::new(17u8), CachePadded::new(37u8)];
+    let a = &*arr[0] as *const u8;
+    let b = &*arr[1] as *const u8;
+    assert!(unsafe { a.offset(64) } <= b);
+}
+
+#[test]
+fn different_sizes() {
+    CachePadded::new(17u8);
+    CachePadded::new(17u16);
+    CachePadded::new(17u32);
+    CachePadded::new([17u64; 0]);
+    CachePadded::new([17u64; 1]);
+    CachePadded::new([17u64; 2]);
+    CachePadded::new([17u64; 3]);
+    CachePadded::new([17u64; 4]);
+    CachePadded::new([17u64; 5]);
+    CachePadded::new([17u64; 6]);
+    CachePadded::new([17u64; 7]);
+    CachePadded::new([17u64; 8]);
+}
+
+#[test]
+fn large() {
+    let a = [17u64; 9];
+    let b = CachePadded::new(a);
+    assert!(mem::size_of_val(&a) <= mem::size_of_val(&b));
+}
+
+#[test]
+fn debug() {
+    assert_eq!(
+        format!("{:?}", CachePadded::new(17u64)),
+        "CachePadded { value: 17 }"
+    );
+}
+
+#[test]
+fn drops() {
+    let count = Cell::new(0);
+
+    struct Foo<'a>(&'a Cell<usize>);
+
+    impl<'a> Drop for Foo<'a> {
+        fn drop(&mut self) {
+            self.0.set(self.0.get() + 1);
+        }
+    }
+
+    let a = CachePadded::new(Foo(&count));
+    let b = CachePadded::new(Foo(&count));
+
+    assert_eq!(count.get(), 0);
+    drop(a);
+    assert_eq!(count.get(), 1);
+    drop(b);
+    assert_eq!(count.get(), 2);
+}
+
+#[test]
+fn clone() {
+    let a = CachePadded::new(17);
+    let b = a.clone();
+    assert_eq!(*a, *b);
+}
+
+#[test]
+fn runs_custom_clone() {
+    let count = Cell::new(0);
+
+    struct Foo<'a>(&'a Cell<usize>);
+
+    impl<'a> Clone for Foo<'a> {
+        fn clone(&self) -> Foo<'a> {
+            self.0.set(self.0.get() + 1);
+            Foo::<'a>(self.0)
+        }
+    }
+
+    let a = CachePadded::new(Foo(&count));
+    let _ = a.clone();
+
+    assert_eq!(count.get(), 1);
+}