shred: fails in case of permissions issue

tests/by-util/test_shred.rs

@@ -6,6 +6,7 @@
 // spell-checker:ignore wipesync
 
 use crate::common::util::TestScenario;
+use std::path::Path;
 
 #[test]
 fn test_invalid_arg() {
@@ -163,3 +164,26 @@ fn test_shred_empty() {
 
     assert!(!at.file_exists(file_a));
 }
+
+#[test]
+#[cfg(all(unix, feature = "chmod"))]
+fn test_shred_fail_no_perm() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+    let dir = "dir";
+
+    let file = "test_shred_remove_a";
+
+    let binding = Path::new("dir").join(file);
+    let path = binding.to_str().unwrap();
+    at.mkdir(dir);
+    at.touch(path);
+    scene.ccmd("chmod").arg("a-w").arg(dir).succeeds();
+
+    scene
+        .ucmd()
+        .arg("-uv")
+        .arg(path)
+        .fails()
+        .stderr_contains("Couldn't rename to");
+}