cw.Prime(cd)
	err := cw.PrintEcds("yaml")
	assert.NoError(t, err)

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

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

	core "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
	"sigs.k8s.io/yaml"

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

const typeURLPrefix = "type.googleapis.com/"

func (c *ConfigWriter) PrintEcds(outputFormat string) error {
	if c.configDump == nil {
		return fmt.Errorf("config writer has not been primed")
	}

	dump, err := c.configDump.GetEcdsConfigDump()
	if err != nil {
		return err
	}

			if err != nil {
				return err
			}

			switch outputFormat {
			case summaryOutput:
				return configWriter.PrintEcdsSummary()
			case jsonOutput, yamlOutput:
				return configWriter.PrintEcds(outputFormat)
			default:
				return fmt.Errorf("output format %q not supported", outputFormat)
			}
		},
		ValidArgsFunction: completion.ValidPodsNameArgs(ctx),
	}