1 files changed, 27 insertions, 0 deletions
diff --git a/library/alloc/tests/string.rs b/library/alloc/tests/string.rs
index f3d74e0514d..9ec0ee97ab9 100644
--- a/library/alloc/tests/string.rs
+++ b/library/alloc/tests/string.rs
@@ -366,6 +366,33 @@ fn remove_bad() {
 }
 
 #[test]
+fn test_remove_matches() {
+    let mut s = "abc".to_string();
+
+    s.remove_matches('b');
+    assert_eq!(s, "ac");
+    s.remove_matches('b');
+    assert_eq!(s, "ac");
+
+    let mut s = "abcb".to_string();
+
+    s.remove_matches('b');
+    assert_eq!(s, "ac");
+
+    let mut s = "ศไทย中华Việt Nam; foobarศ".to_string();
+    s.remove_matches('ศ');
+    assert_eq!(s, "ไทย中华Việt Nam; foobar");
+
+    let mut s = "".to_string();
+    s.remove_matches("");
+    assert_eq!(s, "");
+
+    let mut s = "aaaaa".to_string();
+    s.remove_matches('a');
+    assert_eq!(s, "");
+}
+
+#[test]
 fn test_retain() {
     let mut s = String::from("α_β_γ");