1 files changed, 7 insertions, 0 deletions
diff --git a/src/libcoretest/str.rs b/src/libcoretest/str.rs
index 5f44fd807cc..9574aeb3762 100644
--- a/src/libcoretest/str.rs
+++ b/src/libcoretest/str.rs
@@ -114,3 +114,10 @@ fn test_rev_split_char_iterator_no_trailing() {
     split.reverse();
     assert_eq!(split, vec!["", "Märy häd ä little lämb", "Little lämb"]);
 }
+
+#[test]
+fn test_utf16_code_units() {
+    use core::str::Utf16Encoder;
+    assert_eq!(Utf16Encoder::new(vec!['é', '\U0001F4A9'].into_iter()).collect::<Vec<u16>>(),
+               vec![0xE9, 0xD83D, 0xDCA9])
+}