X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;ds=sidebyside;f=library%2Falloc%2Ftests%2Fstring.rs;h=7ba1c2c611686c8a128f66a448fdc29266e6e7cf;hb=fb9bb2b5ca517d85e1041ea9f80d06f48054624c;hp=f7f78046d089b09479a2c7067c06e7de70115d76;hpb=4f0c245429a0a42ea652b85a5390203bd6a12bbc;p=rust.git

diff --git a/library/alloc/tests/string.rs b/library/alloc/tests/string.rs
index f7f78046d08..7ba1c2c6116 100644
--- a/library/alloc/tests/string.rs
+++ b/library/alloc/tests/string.rs
@@ -1,6 +1,7 @@
 use std::borrow::Cow;
 use std::collections::TryReserveError::*;
 use std::mem::size_of;
+use std::ops::Bound::*;
 
 pub trait IntoCow<'a, B: ?Sized>
 where
@@ -467,6 +468,20 @@ fn test_drain() {
     assert_eq!(t, "");
 }
 
+#[test]
+#[should_panic]
+fn test_drain_start_overflow() {
+    let mut s = String::from("abc");
+    s.drain((Excluded(usize::MAX), Included(0)));
+}
+
+#[test]
+#[should_panic]
+fn test_drain_end_overflow() {
+    let mut s = String::from("abc");
+    s.drain((Included(0), Included(usize::MAX)));
+}
+
 #[test]
 fn test_replace_range() {
     let mut s = "Hello, world!".to_owned();
@@ -504,6 +519,20 @@ fn test_replace_range_inclusive_out_of_bounds() {
     s.replace_range(5..=5, "789");
 }
 
+#[test]
+#[should_panic]
+fn test_replace_range_start_overflow() {
+    let mut s = String::from("123");
+    s.replace_range((Excluded(usize::MAX), Included(0)), "");
+}
+
+#[test]
+#[should_panic]
+fn test_replace_range_end_overflow() {
+    let mut s = String::from("456");
+    s.replace_range((Included(0), Included(usize::MAX)), "");
+}
+
 #[test]
 fn test_replace_range_empty() {
     let mut s = String::from("12345");