From 4c7d8f8253f74994ca7314944ae4a24548d40294 Mon Sep 17 00:00:00 2001
From: Fuad Ismail <fuad1502@gmail.com>
Date: Sun, 24 Nov 2024 23:12:26 +0700
Subject: [PATCH] tests/dmesg: add invalid time-format test.

---
 tests/by-util/test_dmesg.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/by-util/test_dmesg.rs b/tests/by-util/test_dmesg.rs
index c174518..f8c6df5 100644
--- a/tests/by-util/test_dmesg.rs
+++ b/tests/by-util/test_dmesg.rs
@@ -46,3 +46,13 @@ fn test_kmsg_time_format() {
             .stdout_is_fixture(expected_output);
     }
 }
+
+#[test]
+fn test_invalid_time_format() {
+    new_ucmd!()
+        .arg("--time-format=definitely-invalid")
+        .fails()
+        .code_is(1)
+        .no_stdout()
+        .stderr_is("dmesg: unknown time format: definitely-invalid");
+}