obj:                     &v1.Pod{},
			expectedMessageFragment: "fieldPath \"metadata.notexisting['something']\" does not support subscript",
		},
	}

	for _, tc := range cases {
		actual, err := ExtractFieldPathAsString(tc.obj, tc.fieldPath)
		if err != nil {
			if tc.expectedMessageFragment != "" {
				if !strings.Contains(err.Error(), tc.expectedMessageFragment) {

		} else {
			fileProjection.Mode = *defaultMode
		}
		if fileInfo.FieldRef != nil {
			// TODO: unify with Kubelet.podFieldSelectorRuntimeValue
			if values, err := fieldpath.ExtractFieldPathAsString(pod, fileInfo.FieldRef.FieldPath); err != nil {
				klog.Errorf("Unable to extract field %s: %s", fileInfo.FieldRef.FieldPath, err.Error())
				errlist = append(errlist, err)
			} else {