New upstream version 1.51.0+dfsg1

[rustc.git] / vendor / smallvec / src / tests.rs

diff --git a/vendor/smallvec/src/tests.rs b/vendor/smallvec/src/tests.rs
index 0452ae856f5133de4a6370be14c9d1b618e2c6a4..19f6da85dd403d83214b60af0d4dd84a74035e6b 100644 (file)
--- a/vendor/smallvec/src/tests.rs
+++ b/vendor/smallvec/src/tests.rs
@@ -905,3 +905,16 @@ fn empty_macro() {
 fn zero_size_items() {
     SmallVec::<[(); 0]>::new().push(());
 }
+
+#[test]
+fn test_insert_many_overflow() {
+    let mut v: SmallVec<[u8; 1]> = SmallVec::new();
+    v.push(123);
+
+    // Prepare an iterator with small lower bound
+    let iter = (0u8..5).filter(|n| n % 2 == 0);
+    assert_eq!(iter.size_hint().0, 0);
+
+    v.insert_many(0, iter);
+    assert_eq!(&*v, &[0, 2, 4, 123]);
+}