testCases := []struct {
		desc              string
		hostnetwork       bool
		dnsPolicy         v1.DNSPolicy
		dnsConfig         *v1.PodDNSConfig
		expectedDNSConfig *runtimeapi.DNSConfig
	}{
		{
			desc:              "DNSNone without DNSConfig should have empty DNS settings",
			dnsPolicy:         v1.DNSNone,
			expectedDNSConfig: &runtimeapi.DNSConfig{},

	}
	return options
}

// appendDNSConfig appends DNS servers, search paths and options given by
// PodDNSConfig to the existing DNS config. Duplicated entries will be merged.
// This assumes existingDNSConfig and dnsConfig are not nil.
func appendDNSConfig(existingDNSConfig *runtimeapi.DNSConfig, dnsConfig *v1.PodDNSConfig) *runtimeapi.DNSConfig {