@Override
    public Set<HostLocation> locations() {
        return locations;
    }
@Test
    public void testLocations() {
        Set<HostLocation> locations = MULTI_HOMED_HOST.locations();

        assertEquals("There should be 3 locations", locations.size(), 3);
        assertTrue("Host location contains 1st location", locations.contains(LOC1));
        assertTrue("Host location contains 2nd location", locations.contains(LOC2));
        assertTrue("Host location contains 3rd location", locations.contains(LOC3));
    }