@Test
public void testOSListing() throws Exception{

 Set<String> actual_oslist =  os_family.os_list();
 Set<String> expected_oslist = new HashSet<String>(Arrays.asList(
    "redhat6", "oraclelinux5", "suse11", "fedora6", "opensuse11",
    "centos6", "fedora5","centos5", "ubuntu12", "redhat5", "sles11",
    "oraclelinux6", "debian12", "sled11", "win2012server6", "win2012serverr26", "win2008serverr26", "win2008server6"
 ));
 Assert.assertNotNull(actual_oslist);
 Assert.assertEquals(expected_oslist, actual_oslist);
}