if len(mockIntercept.lastRedirect) == 0 {
		t.Fatal("expected nsenterFunc to be called")
	}
	r := mockIntercept.lastRedirect[len(mockIntercept.lastRedirect)-1]
	if !r.dualStack {
		t.Fatalf("expect dualStack is true, actual %v", r.dualStack)
	}
}

func Test_dedupPorts(t *testing.T) {
	type args struct {
		ports []string
	}
	tests := []struct {
		name string
		args args
		want []string