From 0f9f00b54bc9ad6462d32be6be389f263d89b72f Mon Sep 17 00:00:00 2001
From: ridiculousfish <corydoras@ridiculousfish.com>
Date: Sun, 9 Jun 2019 16:08:00 -0700
Subject: [PATCH] Add a test that verifies cd handling in pipes

---
 tests/cd.err |  3 +++
 tests/cd.in  | 19 +++++++++++++++++++
 tests/cd.out |  3 +++
 3 files changed, 25 insertions(+)

diff --git a/tests/cd.err b/tests/cd.err
index 331132ff0..ebc6ea138 100644
--- a/tests/cd.err
+++ b/tests/cd.err
@@ -13,3 +13,6 @@
 
 ####################
 # on-variable PWD
+
+####################
+# cd concurrency
diff --git a/tests/cd.in b/tests/cd.in
index 3ac2c9d02..d52c2e46d 100644
--- a/tests/cd.in
+++ b/tests/cd.in
@@ -86,3 +86,22 @@ function __fish_test_changed_pwd --on-variable PWD
    echo "Changed to $PWD"
 end
 cd /
+functions --erase __fish_test_changed_pwd
+
+logmsg cd concurrency
+# Verify that cds don't stomp on each other.
+function __fish_test_thrash_cd
+   set -l dir (mktemp -d)
+   cd $dir
+   for i in (seq 50)
+       test (/bin/pwd) = $dir
+       and test $PWD = $dir
+       or echo "cd test failed" 1>&2
+       sleep .002
+   end
+end
+__fish_test_thrash_cd |
+__fish_test_thrash_cd |
+__fish_test_thrash_cd |
+__fish_test_thrash_cd |
+__fish_test_thrash_cd
diff --git a/tests/cd.out b/tests/cd.out
index b47e701f4..d6098ed9d 100644
--- a/tests/cd.out
+++ b/tests/cd.out
@@ -34,3 +34,6 @@ No crash with ./ CDPATH
 ####################
 # on-variable PWD
 Changed to /
+
+####################
+# cd concurrency