From 3b9a0c32a0b87236c9397590ac93e3c8add5bcb4 Mon Sep 17 00:00:00 2001
From: Daringcuteseal <daringcuteseal@gmail.com>
Date: Fri, 3 Jan 2025 19:09:03 +0700
Subject: [PATCH] tests/cp: add test to copy from stdin

---
 tests/by-util/test_cp.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tests/by-util/test_cp.rs b/tests/by-util/test_cp.rs
index 5c9e8d5af5e..ddcc5e79af9 100644
--- a/tests/by-util/test_cp.rs
+++ b/tests/by-util/test_cp.rs
@@ -5914,3 +5914,19 @@ fn test_cp_no_file() {
         .code_is(1)
         .stderr_contains("error: the following required arguments were not provided:");
 }
+
+#[test]
+#[cfg(unix)]
+fn test_cp_from_stdin() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let target = "target";
+    let test_string = "Hello, World!\n";
+
+    ucmd.arg("/dev/fd/0")
+        .arg(target)
+        .pipe_in(test_string)
+        .succeeds();
+
+    assert!(at.file_exists(target));
+    assert_eq!(at.read(target), test_string);
+}