tests: Add vmxnet3 qtest

Note that this will emit a warning:
[vmxnet3][WR][vmxnet3_peer_has_vnet_hdr]: Peer has no virtio extension.
Task offloads will be emulated.

Reviewed-by: Dmitry Fleytman <dmitry@daynix.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>

tests/vmxnet3-test.c

@@ -0,0 +1,33 @@
+/*
+ * QTest testcase for vmxnet3 NIC
+ *
+ * Copyright (c) 2013-2014 SUSE LINUX Products GmbH
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include <glib.h>
+#include <string.h>
+#include "libqtest.h"
+#include "qemu/osdep.h"
+
+/* Tests only initialization so far. TODO: Replace with functional tests */
+static void nop(void)
+{
+}
+
+int main(int argc, char **argv)
+{
+    int ret;
+
+    g_test_init(&argc, &argv, NULL);
+    qtest_add_func("/vmxnet3/nop", nop);
+
+    qtest_start("-device vmxnet3");
+    ret = g_test_run();
+
+    qtest_end();
+
+    return ret;
+}