@Test
public void testSendNxRoleRequest() throws Exception {

    doSendNxRoleRequest(Role.MASTER, OFRoleVendorData.NX_ROLE_MASTER);
    doSendNxRoleRequest(Role.SLAVE, OFRoleVendorData.NX_ROLE_SLAVE);
    doSendNxRoleRequest(Role.EQUAL, OFRoleVendorData.NX_ROLE_OTHER);
}