if err != nil {
			return err
		}
		istiodBytes.WriteString(istiod)
	}
	diff := difflib.UnifiedDiff{
		FromFile: "Istiod Clusters",
		A:        difflib.SplitLines(istiodBytes.String()),
		ToFile:   "Envoy Clusters",
		B:        difflib.SplitLines(envoyBytes.String()),
		Context:  c.context,
	}
	text, err := difflib.GetUnifiedDiffString(diff)
	if err != nil {
		return err
	}
	if text != "" {

		if err != nil {
			return err
		}
		istiodBytes.WriteString(istiod)
	}
	diff := difflib.UnifiedDiff{
		FromFile: "Istiod Listeners",
		A:        difflib.SplitLines(istiodBytes.String()),
		ToFile:   "Envoy Listeners",
		B:        difflib.SplitLines(envoyBytes.String()),
		Context:  c.context,
	}
	text, err := difflib.GetUnifiedDiffString(diff)
	if err != nil {
		return err
	}
	if text != "" {

		if err != nil {
			return err
		}
		istiodBytes.WriteString(istiod)
	}
	diff := difflib.UnifiedDiff{
		FromFile: "Istiod Routes",
		A:        difflib.SplitLines(istiodBytes.String()),
		ToFile:   "Envoy Routes",
		B:        difflib.SplitLines(envoyBytes.String()),
		Context:  c.context,
	}
	text, err := difflib.GetUnifiedDiffString(diff)
	if err != nil {
		return err
	}
	lastUpdatedStr := ""

			specifiedConfName: "specific-name.conf",
			expectedConfName:  "specific-name.conf",
			goldenConfName:    "istio-cni.conf",
		},
	}

	for _, c := range cases {
		cfgFile := config.InstallConfig{
			CNIConfName:          c.specifiedConfName,
			ChainedCNIPlugin:     c.chainedCNIPlugin,
			CNINetworkConfigFile: cniNetworkConfigFile,
			LogLevel:             "debug",