Added test to ensure 'set -o pipefail' doesn't break shFlags.

1 files changed, 67 insertions, 0 deletions

diff --git a/shflags_issue_57.sh b/shflags_issue_57.sh
new file mode 100755
index 0000000..2969f5f
--- /dev/null
+++ b/shflags_issue_57.sh
@@ -0,0 +1,67 @@
+#! /bin/sh
+# vim:et:ft=sh:sts=2:sw=2
+#
+# shFlags unit test for Issue #57.
+# https://github.com/kward/shflags/issues/57
+#
+# Copyright 2023 Kate Ward. All Rights Reserved.
+# Released under the Apache 2.0 license.
+#
+# Author: kate.ward@forestent.com (Kate Ward)
+# https://github.com/kward/shflags
+#
+### ShellCheck (http://www.shellcheck.net/)
+# Disable source following.
+#   shellcheck disable=SC1090,SC1091
+# $() are not fully portable (POSIX != portable).
+#   shellcheck disable=SC2006
+
+# These variables will be overridden by the test helpers.
+returnF="${TMPDIR:-/tmp}/return"
+stdoutF="${TMPDIR:-/tmp}/STDOUT"
+stderrF="${TMPDIR:-/tmp}/STDERR"
+
+# Load test helpers.
+. ./shflags_test_helpers
+
+# Test proper functionality with 'set -o pipefail' enabled.
+testIssue57() {
+  set -o pipefail
+
+  th_clearReturn
+  (
+    FLAGS -h >"${stdoutF}" 2>"${stderrF}"
+    echo $? >"${returnF}"
+  )
+
+  assertFalse \
+      'short help request should have returned a false exit code.' \
+      "$(th_queryReturn)"
+  ( grep 'show this help' "${stderrF}" >/dev/null )
+  r3turn=$?
+  assertTrue \
+      'short request for help should have produced some help output.' \
+      ${r3turn}
+  [ ${r3turn} -ne "${FLAGS_TRUE}" ] && th_showOutput
+
+  return ${SHUNIT_TRUE}
+}
+
+oneTimeSetUp() {
+  th_oneTimeSetUp
+
+  if flags_getoptIsStd; then
+    th_warn 'Standard version of getopt found. Enhanced tests will be skipped.'
+    return
+  fi
+  th_warn 'Enhanced version of getopt found. Standard tests will be skipped.'
+}
+
+setUp() {
+  flags_reset
+}
+
+# Load and run shUnit2.
+# shellcheck disable=SC2034
+[ -n "${ZSH_VERSION:-}" ] && SHUNIT_PARENT=$0
+. "${TH_SHUNIT}"