}
	}
	buffer.Write(hostsEntriesFromHostAliases(hostAliases))
	return buffer.Bytes()
}

func hostsEntriesFromHostAliases(hostAliases []v1.HostAlias) []byte {
	if len(hostAliases) == 0 {
		return []byte{}
	}

	var buffer bytes.Buffer
	buffer.WriteString("\n")
	buffer.WriteString("# Entries added by HostAliases.\n")
	// for each IP, write all aliases onto single line in hosts file

func TestNodeHostsFileContent(t *testing.T) {
	testCases := []struct {
		hostsFileName            string
		hostAliases              []v1.HostAlias
		rawHostsFileContent      string
		expectedHostsFileContent string
	}{
		{
			hostsFileName: "hosts_test_file1",
			hostAliases:   []v1.HostAlias{},
			rawHostsFileContent: `# hosts file for testing.
127.0.0.1	localhost
::1	localhost ip6-localhost ip6-loopback

		in, out := &in.Tolerations, &out.Tolerations
		*out = make([]Toleration, len(*in))
		for i := range *in {
			(*in)[i].DeepCopyInto(&(*out)[i])
		}
	}
	if in.HostAliases != nil {
		in, out := &in.HostAliases, &out.HostAliases
		*out = make([]HostAlias, len(*in))
		for i := range *in {
			(*in)[i].DeepCopyInto(&(*out)[i])
		}
	}
	if in.Priority != nil {
		in, out := &in.Priority, &out.Priority

		in, out := &in.Tolerations, &out.Tolerations
		*out = make([]Toleration, len(*in))
		for i := range *in {
			(*in)[i].DeepCopyInto(&(*out)[i])
		}
	}
	if in.HostAliases != nil {
		in, out := &in.HostAliases, &out.HostAliases
		*out = make([]HostAlias, len(*in))
		for i := range *in {
			(*in)[i].DeepCopyInto(&(*out)[i])
		}
	}
	if in.Priority != nil {
		in, out := &in.Priority, &out.Priority

          },
          "type": "array",
          "x-kubernetes-patch-merge-key": "name",
          "x-kubernetes-patch-strategy": "merge"
        },
        "hostAliases": {
          "description": "HostAliases is an optional list of hosts and IPs that will be injected into the pod's hosts file if specified. This is only valid for non-hostNetwork pods.",
          "items": {