if seen.Has(schedulingGate.Name) {
			allErrs = append(allErrs, field.Duplicate(fldPath.Index(i), schedulingGate.Name))
		}
		seen.Insert(schedulingGate.Name)
	}
	return allErrs
}

func validatePodDNSConfig(dnsConfig *core.PodDNSConfig, dnsPolicy *core.DNSPolicy, fldPath *field.Path, opts PodValidationOptions) field.ErrorList {
	allErrs := field.ErrorList{}

			tc.dnsPolicy = &testDNSClusterFirst
		}

		errs := validatePodDNSConfig(tc.dnsConfig, tc.dnsPolicy, field.NewPath("dnsConfig"), tc.opts)
		if len(errs) != 0 && !tc.expectedError {
			t.Errorf("%v: validatePodDNSConfig(%v) = %v, want nil", tc.desc, tc.dnsConfig, errs)
		} else if len(errs) == 0 && tc.expectedError {
			t.Errorf("%v: validatePodDNSConfig(%v) = nil, want error", tc.desc, tc.dnsConfig)
		}
	}
}