func (pSlice MessageSlice) MarshalJSON() ([]byte, error) {
	buffer := bytes.NewBufferString("[")
	sliceLength := len(pSlice)
	for index, msg := range pSlice {
		b, err := protomarshal.Marshal(msg)
		if err != nil {
			return nil, err
		}
		buffer.Write(b)
		if index < sliceLength-1 {
			buffer.WriteString(",")
		}
	}
	buffer.WriteString("]")
	return buffer.Bytes(), nil

	return &ExecList{
		Cmd:  cmd,
		Args: args,
	}
}

func ExecuteOutput(cmd string, args ...string) (string, error) {
	externalCommand := exec.Command(cmd, args...)
	stdout := &bytes.Buffer{}
	stderr := &bytes.Buffer{}
	externalCommand.Stdout = stdout
	externalCommand.Stderr = stderr

	err := externalCommand.Run()

	if err != nil || len(stderr.Bytes()) != 0 {
		return stderr.String(), err
	}

	"istio.io/istio/pkg/util/protomarshal"
)

// ClusterDiff prints a diff between Istiod and Envoy clusters to the passed writer
func (c *Comparator) ClusterDiff() error {
	envoyBytes, istiodBytes := &bytes.Buffer{}, &bytes.Buffer{}
	envoyClusterDump, err := c.envoy.GetDynamicClusterDump(true)
	if err != nil {
		envoyBytes.WriteString(err.Error())
	} else {

	"istio.io/istio/pkg/util/protomarshal"
)

// ListenerDiff prints a diff between Istiod and Envoy listeners to the passed writer
func (c *Comparator) ListenerDiff() error {
	envoyBytes, istiodBytes := &bytes.Buffer{}, &bytes.Buffer{}
	envoyListenerDump, err := c.envoy.GetDynamicListenerDump(true)
	if err != nil {
		envoyBytes.WriteString(err.Error())
	} else {

		},
		{
			name:    "errors if config dump is not primed",
			wantErr: true,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			gotOut := &bytes.Buffer{}
			cw := &ConfigWriter{Stdout: gotOut}
			cd, _ := os.ReadFile("testdata/configdump.json")
			if tt.callPrime {
				cw.Prime(cd)
			}
			err := cw.PrintBootstrapDump("json")
			if tt.wantOutputFile != "" {

	tests := []struct {
		name    string
		input   map[string]*discovery.DiscoveryResponse
		want    string
		wantErr bool
	}{
		{
			name: "prints multiple istiod inputs to buffer in alphabetical order by pod name",
			input: map[string]*discovery.DiscoveryResponse{
				"istiod1": xdsResponseInput("istiod1", []clientConfigInput{
					{
						proxyID:        "proxy1",
						clusterID:      "cluster1",

	WantException bool
}

func VerifyOutput(t *testing.T, cmd *cobra.Command, c TestCase) {
	t.Helper()

	cmd.SetArgs(c.Args)

	var out bytes.Buffer
	cmd.SetOut(&out)
	cmd.SetErr(&out)
	cmd.SilenceUsage = true

	fErr := cmd.Execute()
	output := out.String()

	if c.ExpectedOutput != "" && c.ExpectedOutput != output {

	_ = parent.PersistentFlags().String(parentFlag0, "", parentFlag0)
	_ = parent.PersistentFlags().String(parentFlag1, "", parentFlag1)
	_ = parent.PersistentFlags().String(parentFlag2, "", parentFlag2)
	var out bytes.Buffer
	parent.SetOut(&out)
	parent.SetErr(&out)

	child := &cobra.Command{
		Use: "child",
		Run: func(c *cobra.Command, args []string) {},
	}
	_ = parent.PersistentFlags().String(childFlag2, "", childFlag2)

					},
					LastUpdated: timestamppb.Now(),
				},
				ClientStatus: 453,
			},
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			var buf bytes.Buffer
			a.Print(&buf)
			expectedOutput := "ACTION   AuthorizationPolicy   RULES\n"
			actualOutput := buf.String()
			if !reflect.DeepEqual(expectedOutput, actualOutput) {

)

func TestPrintEcdsSummary(t *testing.T) {
	gotOut := &bytes.Buffer{}
	cw := &ConfigWriter{Stdout: gotOut}
	cd, _ := os.ReadFile("testdata/ecds/configdump.json")
	cw.Prime(cd)
	err := cw.PrintEcdsSummary()
	assert.NoError(t, err)

	util.CompareContent(t, gotOut.Bytes(), "testdata/ecds/output.txt")
}

func TestPrintEcdsYaml(t *testing.T) {
	gotOut := &bytes.Buffer{}
	cw := &ConfigWriter{Stdout: gotOut}