@Test
  public void nullManagerShouldReturnNull() throws Exception {
    assertThat(securityProps).doesNotContainKey(SECURITY_MANAGER);
    String result =
        authenticator.authenticate(member, securityProps, securityProps);
    assertThat(result).isNull();
  }
Unit tests GMSAuthenticator using new integrated security.
geode-core/src/test/java/org/apache/geode/distributed/internal/membership/adapter/auth/GMSAuthenticatorWithSecurityManagerTest.java