var EmptyFields = func() metav1.FieldsV1 {
	f, err := SetToFields(*fieldpath.NewSet())
	if err != nil {
		panic("should never happen")
	}
	return f
}()

// FieldsToSet creates a set paths from an input trie of fields
func FieldsToSet(f metav1.FieldsV1) (s fieldpath.Set, err error) {
	err = s.FromJSON(bytes.NewReader(f.Raw))
	return s, err
}

// SetToFields creates a trie of fields from an input set of paths

// TestFieldsToSetError tests that errors are picked up by FieldsToSet
func TestFieldsToSetError(t *testing.T) {
	tests := []struct {
		fields    metav1.FieldsV1
		errString string
	}{
		{
			fields: metav1.FieldsV1{
				Raw: []byte(`{"k:{invalid json}":{"f:name":{},".":{}}}`),
			},
			errString: "ReadObjectCB",
		},
	}

	for _, test := range tests {
		_, err := FieldsToSet(test.fields)

	fields := EmptyFields
	if encodedVersionedSet.FieldsV1 != nil {
		fields = *encodedVersionedSet.FieldsV1
	}
	set, err := FieldsToSet(fields)
	if err != nil {
		return nil, fmt.Errorf("error decoding set: %v", err)
	}