testcase: define a network before checks

config/etc/default.conf.lxcbr

-lxc.network.type = veth
-lxc.network.link = lxcbr0
-lxc.network.flags = up
-lxc.network.hwaddr = 00:16:3e:xx:xx:xx
+lxc.net.0.type = veth
+lxc.net.0.link = lxcbr0
+lxc.net.0.flags = up
+lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx

src/tests/get_item.c

@@ -298,6 +298,22 @@ int main(int argc, char *argv[])
 	}
 	printf("%d: get_config_item(lxc.network) returned %d %s\n", __LINE__, ret, v2);
 
+	if (!c->set_config_item(c, "lxc.network.type", "veth")) {
+		fprintf(stderr, "%d: failed to set network.type\n", __LINE__);
+		goto out;
+	}
+	if (!c->set_config_item(c, "lxc.network.link", "lxcbr0")) {
+		fprintf(stderr, "%d: failed to set network.link\n", __LINE__);
+		goto out;
+	}
+	if (!c->set_config_item(c, "lxc.network.flags", "up")) {
+		fprintf(stderr, "%d: failed to set network.flags\n", __LINE__);
+		goto out;
+	}
+	if (!c->set_config_item(c, "lxc.network.hwaddr", "00:16:3e:xx:xx:xx")) {
+		fprintf(stderr, "%d: failed to set network.hwaddr\n", __LINE__);
+		goto out;
+	}
 	if (!c->set_config_item(c, "lxc.network.ipv4", "10.2.3.4")) {
 		fprintf(stderr, "%d: failed to set ipv4\n", __LINE__);
 		goto out;