@Test
public void testEquals() throws Exception {
UserGroupInformation uugi = UserGroupInformation.createUserForTesting(USER_NAME, GROUP_NAMES);
assertEquals(uugi, uugi);
// The subjects should be different, so this should fail
UserGroupInformation ugi2 = UserGroupInformation.createUserForTesting(USER_NAME, GROUP_NAMES);
assertFalse(uugi.equals(ugi2));
assertFalse(uugi.hashCode() == ugi2.hashCode());
// two ugi that have the same subject need to be equal
UserGroupInformation ugi3 = new UserGroupInformation(uugi.getSubject());
assertEquals(uugi, ugi3);
assertEquals(uugi.hashCode(), ugi3.hashCode());
// ensure that different UGI with the same subject are equal
assertEquals(uugi, new UserGroupInformation(uugi.getSubject()));
}
@Override
public int hashCode() {
return realUser.hashCode();
}