Add test for io::Error's size.

rust-lang · Mar 21, 2021 · f398a49 · f398a49
1 parent f293f70
commit f398a49
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/library/std/src/io/error/tests.rs b/library/std/src/io/error/tests.rs
@@ -1,9 +1,15 @@
 use super::{Custom, Error, ErrorKind, Repr};
 use crate::error;
 use crate::fmt;
+use crate::mem::size_of;
 use crate::sys::decode_error_kind;
 use crate::sys::os::error_string;
 
+#[test]
+fn test_size() {
+    assert!(size_of::<Error>() <= size_of::<[usize; 2]>());
+}
+
 #[test]
 fn test_debug_error() {
     let code = 6;