BTreeMap: keep an eye out on the size of the main components

Dylan-DPC-zz · Sep 26, 2020 · 3e485d7 · 3e485d7
1 parent fd15e61
commit 3e485d7
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/library/alloc/src/collections/btree/node/tests.rs b/library/alloc/src/collections/btree/node/tests.rs
@@ -23,3 +23,12 @@ fn test_splitpoint() {
  assert!(left_len + right_len == CAPACITY);
  }
 }
+
+#[test]
+#[cfg(target_arch = "x86_64")]
+fn test_sizes() {
+ assert_eq!(core::mem::size_of::<LeafNode<(), ()>>(), 16);
+ assert_eq!(core::mem::size_of::<LeafNode<i64, i64>>(), 16 + CAPACITY * 8 * 2);
+ assert_eq!(core::mem::size_of::<InternalNode<(), ()>>(), 112);
+ assert_eq!(core::mem::size_of::<InternalNode<i64, i64>>(), 112 + CAPACITY * 8 * 2);
+}