@Test
    void testEquals() {
        assertEquals(Set.of(createInstance("foo"), createInstance("bar"), createInstance("baz")),
                               new HashSet<>(List.of(createInstance("foo"), createInstance("foo"), createInstance("bar"), createInstance("baz"))));
    }
Generic test for identifiers such as {@link Environment} and {@link RegionName}.
@author Ulf Lilleengen
config-provisioning/src/test/java/com/yahoo/config/provision/IdentifierTestBase.java