From 59da0d8cd685150b32f91e1010e5096156443a6a Mon Sep 17 00:00:00 2001
From: Sylvestre Ledru <sylvestre@debian.org>
Date: Sun, 19 Dec 2021 18:19:48 +0100
Subject: [PATCH] cp: add a unit test for issue 1665

---
 tests/by-util/test_cp.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tests/by-util/test_cp.rs b/tests/by-util/test_cp.rs
index fc9dd589c..65d89b163 100644
--- a/tests/by-util/test_cp.rs
+++ b/tests/by-util/test_cp.rs
@@ -731,6 +731,15 @@ fn test_cp_writable_special_file_permissions() {
     new_ucmd!().arg("/dev/null").arg("/dev/zero").succeeds();
 }
 
+#[test]
+#[cfg(unix)]
+fn test_cp_issue_1665() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    ucmd.arg("/dev/null").arg("foo").succeeds();
+    assert!(at.file_exists("foo"));
+    assert_eq!(at.read("foo"), "");
+}
+
 #[test]
 fn test_cp_preserve_no_args() {
     new_ucmd!()