tests/docker: check for an parameters not empty string

Reported-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200701135652.1366-17-alex.bennee@linaro.org>

diff --git a/tests/docker/common.rc b/tests/docker/common.rc
index 02cd67a..ebc5b97 100755 (executable)
--- a/tests/docker/common.rc
+++ b/tests/docker/common.rc
@@ -47,7 +47,7 @@ build_qemu()
 check_qemu()
 {
     # default to make check unless the caller specifies
-    if test -z "$@"; then
+    if [ $# = 0 ]; then
         INVOCATION="check"
     else
         INVOCATION="$@"