Add drain_filter_unconsumed test

1 files changed, 8 insertions, 0 deletions

diff --git a/src/liballoc/tests/vec.rs b/src/liballoc/tests/vec.rs
index c0967cd374d..a89b8aa4a71 100644
--- a/src/liballoc/tests/vec.rs
+++ b/src/liballoc/tests/vec.rs
@@ -1045,6 +1045,14 @@ fn drain_filter_unconsumed_panic() {
 }
 
 #[test]
+fn drain_filter_unconsumed() {
+    let mut vec = vec![1, 2, 3, 4];
+    let drain = vec.drain_filter(|&mut x| x % 2 != 0);
+    drop(drain);
+    assert_eq!(vec, [2, 4]);
+}
+
+#[test]
 fn test_reserve_exact() {
     // This is all the same as test_reserve