From b25fa3e68e83a3c36a111bca0fc090e3bd5529db Mon Sep 17 00:00:00 2001
From: Mattia Rizzolo <mattia@mapreri.org>
Date: Fri, 13 Nov 2015 12:11:16 +0000
Subject: t/testlib: add a expect_stderr(), to explicitely test stderr

---
 t/testlib.sh | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/t/testlib.sh b/t/testlib.sh
index 7d31888..05cdfdc 100644
--- a/t/testlib.sh
+++ b/t/testlib.sh
@@ -156,3 +156,16 @@ expect_output() {
     fi
 }
 
+expect_stderr() {
+    # we need to use 2 subshells, one which discards the stdout, and the other
+    # that redirects stderr to stdout so that it can be saved to the variable
+    local val result
+    val="$1"
+    shift
+    result="$( { "$@" >/dev/null; }  2>&1)" || true
+    if [ "$result" = "$val" ]; then
+        testlib_echo "OK" "$1"
+    else
+        testlib_echo "FAIL" "$1" "expected [$val] but got [$result]"
+    fi
+}
-- 
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