func TestPrepareForCreate(t *testing.T) {
	valid := getValidCSINode("foo")
	emptyAllocatable := &storage.CSINode{
		ObjectMeta: metav1.ObjectMeta{
			Name: "foo",
		},
		Spec: storage.CSINodeSpec{
			Drivers: []storage.CSINodeDriver{
				{
					Name:         "valid-driver-name",
					NodeID:       "valid-node",
					TopologyKeys: []string{"company.com/zone1", "company.com/zone2"},
				},
			},
		},
	}

		Spec: storage.CSINodeSpec{
			Drivers: []storage.CSINodeDriver{{
				Name:         "io.kubernetes.storage.csi.driver",
				NodeID:       nodeID,
				TopologyKeys: []string{"company.com/zone1", "company.com/zone2"},
			}},
		},
	}, {
		// driver name: dash only
		ObjectMeta: metav1.ObjectMeta{Name: "foo2"},
		Spec: storage.CSINodeSpec{
			Drivers: []storage.CSINodeDriver{{
				Name:         "io-kubernetes-storage-csi-driver",

	}
	if err := s.AddGeneratedConversionFunc((*v1.CSINodeDriver)(nil), (*storage.CSINodeDriver)(nil), func(a, b interface{}, scope conversion.Scope) error {
		return Convert_v1_CSINodeDriver_To_storage_CSINodeDriver(a.(*v1.CSINodeDriver), b.(*storage.CSINodeDriver), scope)
	}); err != nil {
		return err
	}
	if err := s.AddGeneratedConversionFunc((*storage.CSINodeDriver)(nil), (*v1.CSINodeDriver)(nil), func(a, b interface{}, scope conversion.Scope) error {

	}
	if err := s.AddGeneratedConversionFunc((*v1beta1.CSINodeDriver)(nil), (*storage.CSINodeDriver)(nil), func(a, b interface{}, scope conversion.Scope) error {
		return Convert_v1beta1_CSINodeDriver_To_storage_CSINodeDriver(a.(*v1beta1.CSINodeDriver), b.(*storage.CSINodeDriver), scope)
	}); err != nil {
		return err
	}

	return string(b)
}

func generateCSINode(nodeIDs nodeIDMap, volumeLimits *storage.VolumeNodeResources, topologyKeys topologyKeyMap) *storage.CSINode {
	nodeDrivers := []storage.CSINodeDriver{}
	for k, nodeID := range nodeIDs {
		dspec := storage.CSINodeDriver{
			Name:        k,
			NodeID:      nodeID,
			Allocatable: volumeLimits,
		}
		if top, exists := topologyKeys[k]; exists {
			dspec.TopologyKeys = top
		}

		(*in).DeepCopyInto(*out)
	}
	return
}

// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new CSINodeDriver.
func (in *CSINodeDriver) DeepCopy() *CSINodeDriver {
	if in == nil {
		return nil
	}
	out := new(CSINodeDriver)
	in.DeepCopyInto(out)
	return out
}

		(*in).DeepCopyInto(*out)
	}
	return
}

// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new CSINodeDriver.
func (in *CSINodeDriver) DeepCopy() *CSINodeDriver {
	if in == nil {
		return nil
	}
	out := new(CSINodeDriver)
	in.DeepCopyInto(out)
	return out
}

		(*in).DeepCopyInto(*out)
	}
	return
}

// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new CSINodeDriver.
func (in *CSINodeDriver) DeepCopy() *CSINodeDriver {
	if in == nil {
		return nil
	}
	out := new(CSINodeDriver)
	in.DeepCopyInto(out)
	return out
}

	// Validate modifying fields inside an existing CSINodeDriver entry is not allowed
	for _, oldDriver := range old.Spec.Drivers {
		for _, newDriver := range new.Spec.Drivers {
			if oldDriver.Name == newDriver.Name {
				if !apiequality.Semantic.DeepEqual(oldDriver, newDriver) {
					allErrs = append(allErrs, field.Invalid(field.NewPath("CSINodeDriver"), newDriver, "field is immutable"))
				}
			}
		}
	}

}

func validNewCSINode(name string) *storageapi.CSINode {
	return &storageapi.CSINode{
		ObjectMeta: metav1.ObjectMeta{
			Name: name,
		},
		Spec: storageapi.CSINodeSpec{
			Drivers: []storageapi.CSINodeDriver{
				{
					Name:         "valid-driver-name",
					NodeID:       "valid-node",
					TopologyKeys: []string{"company.com/zone1", "company.com/zone2"},
				},
			},
		},
	}
}