From 924951e426f1a5b113a0475f671854d20d8edef6 Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis@chromium.org>
Date: Mon, 10 Aug 2020 15:41:49 -0400
Subject: [PATCH] Shell: Add test for 37d5e3e0df6 / #3073

---
 Shell/Tests/sigpipe.sh | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 Shell/Tests/sigpipe.sh

diff --git a/Shell/Tests/sigpipe.sh b/Shell/Tests/sigpipe.sh
new file mode 100644
index 0000000000..e24fd731fb
--- /dev/null
+++ b/Shell/Tests/sigpipe.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# `head -n 1` should close stdout of the `Shell -c` command, which means the
+# second echo should exit unsuccessfully and sigpipe.sh.out should not be
+# created.
+rm -f sigpipe.sh.out
+
+# FIXME: It'd be nice if there was a way to create a subshell that makes
+# fewer assumptions about cwd and the build directory name.
+Build/Meta/Lagom/shell -c 'echo foo && echo bar && echo baz > sigpipe.sh.out' | head -n 1 > /dev/null
+
+# Failing commands don't make the test fail, just an explicit `exit 1` does.
+# So the test only fails if sigpipe.sh.out exists (since then `exit 1` runs),
+# not if the `test` statement returns false.
+test -e sigpipe.sh.out && exit 1