From 04ab5b010860e290fa0b23b7a4cca47ce934e996 Mon Sep 17 00:00:00 2001
From: Zhuoxun Yang <Zhuoxun.Yang777@outlook.com>
Date: Tue, 17 Oct 2023 22:26:19 +0800
Subject: [PATCH] tests/expr: add tests for ""

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

diff --git a/tests/by-util/test_expr.rs b/tests/by-util/test_expr.rs
index 840e1f325..28cfcf0ec 100644
--- a/tests/by-util/test_expr.rs
+++ b/tests/by-util/test_expr.rs
@@ -143,6 +143,14 @@ fn test_or() {
         .args(&["12", "|", "9a", "+", "1"])
         .succeeds()
         .stdout_only("12\n");
+
+    new_ucmd!().args(&["", "|", ""]).run().stdout_only("0\n");
+
+    new_ucmd!().args(&["", "|", "0"]).run().stdout_only("0\n");
+
+    new_ucmd!().args(&["", "|", "00"]).run().stdout_only("0\n");
+
+    new_ucmd!().args(&["", "|", "-0"]).run().stdout_only("0\n");
 }
 
 #[test]
@@ -178,6 +186,8 @@ fn test_and() {
         .stdout_only("0\n");
 
     new_ucmd!().args(&["", "&", "1"]).run().stdout_only("0\n");
+
+    new_ucmd!().args(&["", "&", ""]).run().stdout_only("0\n");
 }
 
 #[test]