Extend the test for `EscapeUnicode`

to also check that it is legitimately an `ExactSizeIterator`.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/libcoretest/char.rs b/src/libcoretest/char.rs
index e959e71daf7..7da876b9459 100644
--- a/src/libcoretest/char.rs
+++ b/src/libcoretest/char.rs
@@ -276,6 +276,12 @@ fn eu_iterator_specializations() {
             // Check last
             assert_eq!(iter.clone().last(), Some('}'));
 
+            // Check len
+            assert_eq!(iter.len(), len - offset);
+
+            // Check size_hint (= len in ExactSizeIterator)
+            assert_eq!(iter.size_hint(), (iter.len(), Some(iter.len())));
+
             // Check counting
             assert_eq!(iter.clone().count(), len - offset);