[PULL 03/13] tests: be a bit more strict cleaning up fifos

["Alex Bennée" <alex.bennee@linaro.org>]

When we re-factored we dropped the unlink() step which turns out to be
required for rmdir to do its thing. If we had been checking the return
value we would have noticed so lets do that with this fix.

Fixes: 68406d1085 (tests/unit: cleanups for test-io-channel-command)
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230221094558.2864616-5-alex.bennee@linaro.org>

diff --git a/tests/unit/test-io-channel-command.c b/tests/unit/test-io-channel-command.c
index 04b75ab3b4..c6e66a8c33 100644
--- a/tests/unit/test-io-channel-command.c
+++ b/tests/unit/test-io-channel-command.c
@@ -42,6 +42,7 @@ static void test_io_channel_command_fifo(bool async)
     g_auto(GStrv) dstargv = g_strsplit(dstargs, " ", -1);
     QIOChannel *src, *dst;
     QIOChannelTest *test;
+    int err;
 
     if (mkfifo(fifo, 0600)) {
         g_error("mkfifo: %s", strerror(errno));
@@ -61,7 +62,10 @@ static void test_io_channel_command_fifo(bool async)
     object_unref(OBJECT(src));
     object_unref(OBJECT(dst));
 
-    g_rmdir(tmpdir);
+    err = g_unlink(fifo);
+    g_assert(err == 0);
+    err = g_rmdir(tmpdir);
+    g_assert(err == 0);
 }
 
 static void test_io_channel_command_fifo_async(void)
-- 
2.39.1