rol.i.setValidity({customError: true}, 'customError message');
  assert_true(validity.customError, 'customError should be true.');
  assert_false(validity.valid);
  assert_equals(control.i.validationMessage, 'customError message');

  // Set multiple flags
  control.i.setValidity({badInput: true, customError: true}, 'multiple errors');
  assert_true(validity.badInput);
  assert_true(validity.customError);
  assert_false(validity.valid);
  assert_equals(control.i.validationMessage, 'multiple errors');

  // 