1 files changed, 46 insertions, 0 deletions
diff --git a/src/test/test-loopback.c b/src/test/test-loopback.c
new file mode 100644
index 0000000..48869ae
--- /dev/null
+++ b/src/test/test-loopback.c
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <sched.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "errno-util.h"
+#include "log.h"
+#include "loopback-setup.h"
+#include "tests.h"
+
+TEST_RET(loopback_setup) {
+        int r;
+
+        if (unshare(CLONE_NEWUSER | CLONE_NEWNET) < 0) {
+                if (ERRNO_IS_PRIVILEGE(errno) || ERRNO_IS_NOT_SUPPORTED(errno))
+                        return log_tests_skipped("lacking privileges or namespaces not supported");
+                return log_error_errno(errno, "Failed to create user+network namespace: %m");
+        }
+
+        r = loopback_setup();
+        if (r < 0)
+                return log_error_errno(r, "loopback: %m");
+
+        log_info("> ipv6 main");
+        /* <0 → fork error, ==0 → success, >0 → error in child */
+        assert_se(system("ip -6 route show table main") >= 0);
+
+        log_info("> ipv6 local");
+        assert_se(system("ip -6 route show table local") >=0);
+
+        log_info("> ipv4 main");
+        assert_se(system("ip -4 route show table main") >= 0);
+
+        log_info("> ipv4 local");
+        assert_se(system("ip -4 route show table local") >= 0);
+
+        return EXIT_SUCCESS;
+}
+
+static int intro(void) {
+        log_show_color(true);
+        return EXIT_SUCCESS;
+}
+
+DEFINE_TEST_MAIN_WITH_INTRO(LOG_INFO, intro);