}{
		{
			name:              "no cgroups",
			cgroupPaths:       []string{},
			expectPodUID:      "",
			expectContainerID: "",
		},
		{
			name: "no container ID in cgroups",
			cgroupPaths: []string{
				"/user.slice",
			},
			expectPodUID:      "",
			expectContainerID: "",
		},
		{
			name: "one container ID in cgroups",
			cgroupPaths: []string{
				"/user.slice",

	// we don't have to muck with greediness. TrimSuffix is no-copy so this
	// is cheap.
	cgroupPath = strings.TrimSuffix(cgroupPath, ".scope")

	var matchResults map[string]string
	for _, regex := range cgroupREs {
		matches := reSubMatchMap(regex, cgroupPath)
		if isValidCGroupPathMatches(matches) {
			if matchResults != nil {
				return "", "", false
			}
			matchResults = matches