From ff66d2f3c1f1ed1f2bfe38ede8746e694b28fcca Mon Sep 17 00:00:00 2001
From: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
Date: Sun, 8 Oct 2017 02:06:48 +0200
Subject: [PATCH] Add more `test` examples, including expression negation

Closes #4383
---
 doc_src/test.txt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/doc_src/test.txt b/doc_src/test.txt
index c5aa4b0fb..8fbc8caeb 100644
--- a/doc_src/test.txt
+++ b/doc_src/test.txt
@@ -139,6 +139,22 @@ if test $status -eq 0
 end
 \endfish
 
+The previous test can likewise be inverted:
+
+\fish
+if test ! $status -eq 0
+    echo "Previous command failed"
+end
+\endfish
+
+which is logically equivalent to the following:
+
+\fish
+if test $status -ne 0
+    echo "Previous command failed"
+end
+\endfish
+
 \subsection test-standards Standards
 
 `test` implements a subset of the <a href="http://www.unix.com/man-page/POSIX/1/test/">IEEE Std 1003.1-2008 (POSIX.1) standard</a>. The following exceptions apply: