return nil, nil, err
			}
		}
	}

	injector := &ExternalInjector{}
	if injectConfigFile != "" {
		injectionConfig, err := os.ReadFile(injectConfigFile) // nolint: vetshadow
		if err != nil {
			return nil, nil, err
		}
		injectConfig, err := readInjectConfigFile(injectionConfig)
		if err != nil {

				t.Fatal(err)
			}

			for _, gw := range tt.gateways {
				_, _ = client.GatewayAPI().GatewayV1().Gateways(gw.Namespace).Create(context.Background(), gw, metav1.CreateOptions{})
			}
			defaultFile, err := os.ReadFile(fmt.Sprintf("testdata/waypoint/%s", tt.expectedOutFile))
			if err != nil {
				t.Fatal(err)
			}
			expectedOut := string(defaultFile)
			if len(expectedOut) == 0 {
				t.Fatal("expected output is empty")
			}

		}
	}

	{
		buf := make([]byte, 5)
		// Test for negative offset.
		if _, err = xlStorage.ReadFile(context.Background(), volume, "myobject", -1, buf, v); err == nil {
			t.Fatalf("expected: error, got: <nil>")
		}
	}

	for l := 0; l < 2; l++ {
		// Following block validates all ReadFile test cases.
		for i, testCase := range testCases {
			var n int64
			// Common read buffer.

	return forEachLoopbackRoute(cfg, "remove", netlink.RouteDel)
}

const ipv6DisabledLo = "/proc/sys/net/ipv6/conf/lo/disable_ipv6"

func ReadSysctl(key string) (string, error) {
	data, err := os.ReadFile(key)
	if err != nil {
		return "", err
	}
	return strings.TrimSpace(string(data)), nil
}

func forEachLoopbackRoute(cfg *Config, operation string, f func(*netlink.Route) error) error {

	Fatal(args ...interface{})
}

func loadCompressed(t tester, file string) (js []byte) {
	dec, err := zstd.NewReader(nil)
	if err != nil {
		t.Fatal(err)
	}
	defer dec.Close()
	js, err = os.ReadFile(filepath.Join("testdata", file+".json.zst"))
	if err != nil {
		t.Fatal(err)
	}
	js, err = dec.DecodeAll(js, nil)
	if err != nil {
		t.Fatal(err)
	}

	return js
}

var testCases = []struct {

			return "", fmt.Errorf("CNI config file %s removed during configuration", cniConfigFilepath)
		}
		// This section overwrites an existing plugins list entry for istio-cni
		existingCNIConfig, err := os.ReadFile(cniConfigFilepath)
		if err != nil {
			return "", err
		}
		pluginConfig, err = insertCNIConfig(pluginConfig, existingCNIConfig)
		if err != nil {
			return "", err
		}
	}

	debug, err := extractConfigDump(kubeClient, podName, podNamespace, includeEds)
	if err != nil {
		return nil, err
	}
	return setupConfigdumpEnvoyConfigWriter(debug, out)
}

func readFile(filename string) ([]byte, error) {
	file := os.Stdin
	if filename != "-" {
		var err error
		file, err = os.Open(filename)
		if err != nil {
			return nil, err
		}
	}
	defer func() {

	wantException bool
}

// Tests Pilot /debug
func TestDescribe(t *testing.T) {
	productPageConfigPath := "testdata/describe/http_config.json"
	config, err := os.ReadFile(productPageConfigPath)
	if err != nil {
		t.Fatalf("failed to read %s: %v", productPageConfigPath, err)
	}
	cases := []execAndK8sConfigTestCase{
		{ // case 0
			args:           []string{},

				meta.name = decodeDirObject(meta.name)

				return send(meta)
			}
			// Check legacy.
			if HasSuffix(entry, xlStorageFormatFileV1) && legacy {
				var meta metaCacheEntry
				meta.metadata, err = xioutil.ReadFile(pathJoinBuf(sb, volumeDir, current, entry))
				diskHealthCheckOK(ctx, err)
				if err != nil {
					if !IsErrIgnored(err, io.EOF, io.ErrUnexpectedEOF) {
						internalLogIf(ctx, err)
					}
					continue

			for key, ss := range tt.input {
				input[key] = ss
			}

			err := sw.PrintAll(input)
			if tt.wantErr {
				assert.Error(t, err)
			} else {
				assert.NoError(t, err)
			}
			want, _ := os.ReadFile(tt.want)
			if err := util.Compare(got.Bytes(), want); err != nil {
				t.Error(err)
			}
		})
	}
}

const clientConfigType = "type.googleapis.com/envoy.service.status.v3.ClientConfig"