cniConfigFilename: "istio-cni.conf",
			existingConfFiles: map[string]string{"istio-cni.conf": "istio-cni.conf"},
		},
	}

	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			// Create temp directory for files
			tempDir := t.TempDir()

			// Create existing config files if specified in test case
			for srcFilename, targetFilename := range c.existingConfFiles {